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  • Why is this line breaking Rails with Passenger on DreamHost?

    - by Frew
    Ok, so I have a Rails app set up on DreamHost and I had it working a while ago and now it's broken. I don't know a lot about deployment environments or anything like that so please forgive my ignorance. Anyway, it looks like the app is crashing at this line in config/environment.rb: require File.join(File.dirname(__FILE__), 'boot') config/boot.rb is pretty much normal, but I'll include it here anyway. # Don't change this file! # Configure your app in config/environment.rb and config/environments/*.rb RAILS_ROOT = "#{File.dirname(__FILE__)}/.." unless defined?(RAILS_ROOT) module Rails class << self def boot! unless booted? preinitialize pick_boot.run end end def booted? defined? Rails::Initializer end def pick_boot (vendor_rails? ? VendorBoot : GemBoot).new end def vendor_rails? File.exist?("#{RAILS_ROOT}/vendor/rails") end def preinitialize load(preinitializer_path) if File.exist?(preinitializer_path) end def preinitializer_path "#{RAILS_ROOT}/config/preinitializer.rb" end end class Boot def run load_initializer Rails::Initializer.run(:set_load_path) end end class VendorBoot < Boot def load_initializer require "#{RAILS_ROOT}/vendor/rails/railties/lib/initializer" Rails::Initializer.run(:install_gem_spec_stubs) end end class GemBoot < Boot def load_initializer self.class.load_rubygems load_rails_gem require 'initializer' end def load_rails_gem if version = self.class.gem_version gem 'rails', version else gem 'rails' end rescue Gem::LoadError => load_error $stderr.puts %(Missing the Rails #{version} gem. Please `gem install -v=#{version} rails`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.) exit 1 end class << self def rubygems_version Gem::RubyGemsVersion if defined? Gem::RubyGemsVersion end def gem_version if defined? RAILS_GEM_VERSION RAILS_GEM_VERSION elsif ENV.include?('RAILS_GEM_VERSION') ENV['RAILS_GEM_VERSION'] else parse_gem_version(read_environment_rb) end end def load_rubygems require 'rubygems' min_version = '1.1.1' unless rubygems_version >= min_version $stderr.puts %Q(Rails requires RubyGems >= #{min_version} (you have #{rubygems_version}). Please `gem update --system` and try again.) exit 1 end rescue LoadError $stderr.puts %Q(Rails requires RubyGems >= #{min_version}. Please install RubyGems and try again: http://rubygems.rubyforge.org) exit 1 end def parse_gem_version(text) $1 if text =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/ end private def read_environment_rb File.read("#{RAILS_ROOT}/config/environment.rb") end end end end # All that for this: Rails.boot! Does anyone have any ideas? I am not getting any errors in the log or on the page. -fREW

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  • Memcache on ubuntu server lucid and ruby 1.9.1

    - by Thiago
    Hi there, I'm trying to set up a memcache server on the above setup. I'm getting the following error: /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:443:in `load_missing_constant': uninitialized constant MemCache (NameError) from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:92:in `const_missing' from /root/voicegateway/vendor/plugins/workling/lib/workling/clients/memcache_queue_client.rb:18:in `<class:MemcacheQueueClient>' from /root/voicegateway/vendor/plugins/workling/lib/workling/clients/memcache_queue_client.rb:14:in `<module:Clients>' from /root/voicegateway/vendor/plugins/workling/lib/workling/clients/memcache_queue_client.rb:13:in `<module:Workling>' from /root/voicegateway/vendor/plugins/workling/lib/workling/clients/memcache_queue_client.rb:12:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /root/voicegateway/vendor/plugins/workling/lib/workling/remote/runners/client_runner.rb:2:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /root/voicegateway/vendor/plugins/workling/lib/workling/remote/runners/starling_runner.rb:1:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /root/voicegateway/vendor/plugins/workling/lib/workling/remote.rb:3:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:380:in `load' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:380:in `block in load_file' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:379:in `load_file' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:259:in `require_or_load' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:425:in `load_missing_constant' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies' from /root/voicegateway/config/environments/development.rb:20:in `block in load_environment' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:386:in `eval' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:386:in `block in load_environment' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:379:in `load_environment' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:137:in `process' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:113:in `run' from /root/voicegateway/config/environment.rb:9:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/commands/server.rb:84:in `<top (required)>' from ./server:3:in `require' from ./server:3:in `<main>' But memcache-client 1.8.3 is on the gem list. What's the problem?

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  • Memcache on ubuntu server lucid and ruby 1.9.1

    - by Thiago
    I'm trying to set up a memcache server on the above setup. I'm getting the following error: /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:443:in `load_missing_constant': uninitialized constant MemCache (NameError) from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:92:in `const_missing' from /root/voicegateway/vendor/plugins/workling/lib/workling/clients/memcache_queue_client.rb:18:in `<class:MemcacheQueueClient>' from /root/voicegateway/vendor/plugins/workling/lib/workling/clients/memcache_queue_client.rb:14:in `<module:Clients>' from /root/voicegateway/vendor/plugins/workling/lib/workling/clients/memcache_queue_client.rb:13:in `<module:Workling>' from /root/voicegateway/vendor/plugins/workling/lib/workling/clients/memcache_queue_client.rb:12:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /root/voicegateway/vendor/plugins/workling/lib/workling/remote/runners/client_runner.rb:2:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /root/voicegateway/vendor/plugins/workling/lib/workling/remote/runners/starling_runner.rb:1:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /root/voicegateway/vendor/plugins/workling/lib/workling/remote.rb:3:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:380:in `load' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:380:in `block in load_file' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:379:in `load_file' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:259:in `require_or_load' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:425:in `load_missing_constant' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies' from /root/voicegateway/config/environments/development.rb:20:in `block in load_environment' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:386:in `eval' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:386:in `block in load_environment' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:379:in `load_environment' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:137:in `process' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/initializer.rb:113:in `run' from /root/voicegateway/config/environment.rb:9:in `<top (required)>' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `block in require' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' from /var/lib/gems/1.9.1/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' from /var/lib/gems/1.9.1/gems/rails-2.3.8/lib/commands/server.rb:84:in `<top (required)>' from ./server:3:in `require' from ./server:3:in `<main>' But memcache-client 1.8.3 is on the gem list. What's the problem?

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  • WSO2 ESB on Carbon 4.2 - Did not find the desired phase 'Transport' while deploying handler 'POXSecurityHandler'

    - by user3385500
    I'm new to WSO2 ESB and would like to try it out for some external integrations. I've installed the WSO2 Carbon 4.2 server and installed the ESB feature 4.8.1. After a restart, I'm getting some errors as below. Any tips or suggestions would be gratefully accepted. Thanks. [2014-03-06 10:01:08,521] INFO {org.wso2.carbon.mediation.initializer.ServiceBusInitializer} - Initializing Apache Synapse... [2014-03-06 10:01:08,525] FATAL {org.wso2.carbon.mediation.initializer.ServiceBusInitializer} - Couldn't initialize the ESB... org.apache.synapse.SynapseException: The synapse.xml location ././ ./repository/deployment/server/synapse-configs /default doesn't exist at org.apache.synapse.SynapseControllerFactory.handleFatal(SynapseControllerFactory.java:121) at org.apache.synapse.SynapseControllerFactory.validatePath(SynapseControllerFactory.java:113) at org.apache.synapse.SynapseControllerFactory.validate(SynapseControllerFactory.java:88) at org.apache.synapse.SynapseControllerFactory.createSynapseController(SynapseControllerFactory.java:44) at org.apache.synapse.ServerManager.init(ServerManager.java:102) at org.wso2.carbon.mediation.initializer.ServiceBusInitializer.initESB(ServiceBusInitializer.java:423) at org.wso2.carbon.mediation.initializer.ServiceBusInitializer.activate(ServiceBusInitializer.java:182) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) ... ... ... [2014-03-06 10:01:08,531] INFO {org.wso2.carbon.rule.kernel.internal.ds.RuleEngineConfigDS} - Successfully registered the Rule Config service [2014-03-06 10:01:08,553] ERROR {org.wso2.carbon.security.internal.SecurityMgtServiceComponent} - Failed to activate SecurityMgtServiceComponent org.apache.axis2.phaseresolver.PhaseException: Did not find the desired phase 'Transport' while deploying handler 'POXSecurityHandler'. at org.apache.axis2.phaseresolver.PhaseHolder.addHandler(PhaseHolder.java:75) at org.apache.axis2.phaseresolver.PhaseResolver.engageModuleToFlow(PhaseResolver.java:68) at org.apache.axis2.phaseresolver.PhaseResolver.engageModuleToOperation(PhaseResolver.java:104) at org.apache.axis2.phaseresolver.PhaseResolver.engageModuleToOperation(PhaseResolver.java:110) at org.apache.axis2.description.AxisOperation.onEngage(AxisOperation.java:152) at org.apache.axis2.description.AxisDescription.engageModule(AxisDescription.java:478) at org.apache.axis2.description.AxisService.onEngage(AxisService.java:827) at org.apache.axis2.description.AxisDescription.engageModule(AxisDescription.java:478) at org.apache.axis2.description.AxisServiceGroup.onEngage(AxisServiceGroup.java:134)

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  • Error while trying to install Community Engine: NameError - "Undefined local variable or method 'map

    - by floatingfrisbee
    I'm trying to install Community Engine using the instructions here: http://github.com/bborn/communityengine At first I thought it might be because I had Rails 2.3.5 and desert 0.5.3 which were higher versions than what was mentioned on the installation site. However moving to rails 2.3.4 and desert 0.5.2 did not work. Any ideas as to what might be going on? $ script/generate plugin_migration /usr/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecat ed and will be removed on or after August 2010. Use #requirement /cygdrive/c/users/me/jesse/projects/ceng1/config/routes.rb:2: undefined local variable or method `map' for main:Object (NameError ) from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:147:in `load_without_new_constant _marking' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:147:in `load_without_desert' from /usr/lib/ruby/gems/1.8/gems/desert-0.5.2/lib/desert/ruby/object.rb:18:in `load' from /usr/lib/ruby/gems/1.8/gems/desert-0.5.2/lib/desert/ruby/object.rb:32:in `__each_matching_file' from /usr/lib/ruby/gems/1.8/gems/desert-0.5.2/lib/desert/ruby/object.rb:17:in `load' from /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/routing/route_set.rb:286:in `load_routes!' from /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/routing/route_set.rb:286:in `each' from /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/routing/route_set.rb:286:in `load_routes!' from /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/routing/route_set.rb:266:in `reload!' from /usr/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/initializer.rb:537:in `initialize_routing' from /usr/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/initializer.rb:188:in `process' from /usr/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/initializer.rb:113:in `send' from /usr/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/initializer.rb:113:in `run' from /cygdrive/c/users/me/jesse/projects/ceng1/config/environment.rb:6 from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from /usr/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/commands/generate.rb:1 from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from script/generate:3

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  • What do these errors mean? ISOC++ forbids assignment of arrays...

    - by xunlinkx
    I'm trying to compile some code on one of our systems for our DBA...I've edited the makefiles to include the pertinent libraries listed in the documentation, but I keep getting these errors... Can you discern any obvious problems from my command lines in reference to the errors listed? Thank you! make -f /u01/app/banner/ban8/TEST3/links/Makefile_tm_linux64_redhat5_ban8.mk gcc -m64 -D_NOFIXARGPTR -fpic -shared -DTMCILIB_EXPORTS -D_TMUNICODE -I/usr/local/ban_icu -I/usr/local/src/icu/source/i18n/ -I/usr/local/src/icu/source/common/ -I/usr/local/src/icu/source/extra/ustdio/ -I/usr/local/src/icu/source/io -L/usr/lib64 -L/usr/lib -L/usr/local/src/icu/source/data/ -L/usr/local/src/icu/source/data/out/ -L/usr/local/src/icu/source/tools/toolutil/ -L/usr/lib/im/icuconv/ -L/usr/local/lib/ -L. -licui18n -licudata -licuuc -licu-toolutil -licuio msgfmttm.cpp umsgtm.cpp tmcilib.cpp -o /u01/app/banner/ban8/TEST3/general/exe/libtmciuc.so umsgtm.cpp: In function ‘void fixArgPtr(const UChar*, __va_list_tag (*)[1])’: umsgtm.cpp:158: error: array must be initialized with a brace-enclosed initializer umsgtm.cpp:194: error: ISO C++ forbids assignment of arrays umsgtm.cpp: In function ‘int32_t tmumsg_vformat(void*, UChar, int32_t, __va_list_tag*, UErrorCode*)’: umsgtm.cpp:305: error: cannot convert ‘__va_list_tag**’ to ‘__va_list_tag ()[1]’ for argument ‘2’ to ‘void fixArgPtr(const UChar, __va_list_tag (*)[1])’ tmcilib.cpp: In function ‘int tmprintf(TMBundle*, const UChar*, ...)’: tmcilib.cpp:743: error: array must be initialized with a brace-enclosed initializer tmcilib.cpp: In function ‘int tmfprintf(TMBundle*, UFILE*, const UChar*, ...)’: tmcilib.cpp:757: error: array must be initialized with a brace-enclosed initializer tmcilib.cpp: In function ‘int tmsprintf(TMBundle*, UChar*, const UChar*, ...)’: tmcilib.cpp:808: error: array must be initialized with a brace-enclosed initializer

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  • Qt4Dotnet on Mac OS X

    - by Tony
    Hello everyone. I'm using Qt4Dotnet project in order to port application originally written in C# on Linux and Mac. Port to Linux hasn't taken much efforts and works fine. But Mac (10.4 Tiger) is a bit more stubborn. The problem is: when I try to start my application it throws an exception. Exception states that com.trolltech.qt.QtJambi_LibraryInitializer is unable to find all necessary ibraries. QtJambi library initializer uses java.library.path VM environment variable. This variable includes current working directory. I put all necessary libraries in a working directory. When I try to run the application from MonoDevelop IDE, initializer is able to load one library, but the other libraries are 'missing': An exception was thrown by the type initializer for com.trolltech.qt.QtJambi_LibraryInitializer --- java.lang.RuntimeException: Loading library failed, progress so far: No 'qtjambi-deployment.xml' found in classpath, loading libraries via 'java.library.path' Loading library: 'libQtCore.4.dylib'... - using 'java.library.path' - ok, path was: /Users/chin/test/bin/Debug/libQtCore.4.dylib Loading library: 'libqtjambi.jnilib'... - using 'java.library.path' Both libQtCore.4.dylib and libqtjambi.jnilib are in the same directory. When I try to run it from the command prompt, the initializer is unable to load even libQtCore.4.dylib. I'm using Qt4Dotnet v4.5.0 (currently the latest) with QtJambi v4.5.2 libraries. This might be the source of the problem, but I'm neither able to compile Qt4Dotnet v4.5.2 by myself nor to find QtJambi v4.5.0 libraries. Project's page states that some sort of patch should be applied to QtJambi's source code in order to be compatible with Mono framework, but this patch hasn't been released yet. Without this patch application crashes in a strange manner (other than library seek fault). I must note that original QtJambi loads all necessary libraries perfectly, so it might be issues of IKVM compiler used to translate QtJambi into .Net library. Any suggestions how can I overcome this problem?

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  • Can't get rails app to start on heroku

    - by jonnii
    I'm trying to deploy a rails app to heroku, but keep getting the following error. I'd have thought that managing the postgres gems would be something heroku would handle. I've tried everything I can think of short of installing postgres on my local machine, which I'd need to do if I wanted to install the postgres gem. There's also no gem called activerecord-postgresql-adapter... I'm guessing this is the standard adapter that comes with rails?? Any thoughts on how to fix this? App failed to start /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_specification.rb:76:in `establish_connection': Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (no such file to load -- pg) (RuntimeError) from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_specification.rb:60:in `establish_connection' from /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_specification.rb:55:in `establish_connection' from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:438:in `initialize_database' from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:141:in `process' from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `send' from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `run' from /disk1/home/slugs/135415_c7f31f0_9f1f/mnt/config/environment.rb:9 from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' ... 14 levels... from /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/builder.rb:29:in `instance_eval' from /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/builder.rb:29:in `initialize' from /home/heroku_rack/heroku.ru:1:in `new' from /home/heroku_rack/heroku.ru:1

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  • CompliationLock throws HttpException when registering areas for ASP.NET MVC unit tests

    - by patridge
    The moment I added a unit test to my ASP.NET MVC application to test some of the area routing, I got an HttpException coming out of the System.Web.Complication.CompilationLock type initializer with the following stack trace. System.Web.HttpException : The type initializer for 'System.Web.Compilation.CompilationLock' threw an exception. ----> System.TypeInitializationException : The type initializer for 'System.Web.Compilation.CompilationLock' threw an exception. ----> System.NullReferenceException : Object reference not set to an instance of an object. at System.Web.Compilation.BuildManager.ReportTopLevelCompilationException() at System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() at System.Web.Compilation.BuildManager.GetReferencedAssemblies() at System.Web.Mvc.BuildManagerWrapper.System.Web.Mvc.IBuildManager.GetReferencedAssemblies() at System.Web.Mvc.TypeCacheUtil.FilterTypesInAssemblies(IBuildManager buildManager, Predicate`1 predicate) at System.Web.Mvc.TypeCacheUtil.GetFilteredTypesFromAssemblies(String cacheName, Predicate`1 predicate, IBuildManager buildManager) at System.Web.Mvc.AreaRegistration.RegisterAllAreas(RouteCollection routes, IBuildManager buildManager, Object state) at System.Web.Mvc.AreaRegistration.RegisterAllAreas(Object state) at System.Web.Mvc.AreaRegistration.RegisterAllAreas() at StpWeb.MvcApplication.RegisterRoutes(RouteCollection routes) in Global.asax.cs: line 16 at StpWeb.Tests.RoutesTest.TestFixtureSetUp() in RoutesTest.cs: line 11 --TypeInitializationException at System.Web.Compilation.CompilationLock.GetLock(ref Boolean gotLock) at System.Web.Compilation.BuildManager.EnsureTopLevelFilesCompiled() --NullReferenceException at System.Web.Compilation.CompilationLock..cctor()

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  • PreApplicationStartMethod Attribute causes exception

    - by Joop
    Strange thing happening to me with the PreApplicationStartMethod Attribute. I did implement it in my latest project. In the AssemblyInfo.cs I have the following line: [assembly: PreApplicationStartMethod(typeof(MyAssembly.Initializer), "Initialize")] The Type and method look like this: namespace MyAssembly { public static class Initializer { public static void Initialize() { TranslationKeys.Initialize(); } } } When I rebuild my application and load it in the browser I get the following error: The method specified by the PreApplicationStartMethodAttribute on assembly 'MyWebApp, Version=0.0.1.0, Culture=neutral, PublicKeyToken=null' cannot be resolved. Type: 'MyAssembly.Initializer', MethodName: 'Initialize'. Verify that the type is public and the method is public and static (Shared in Visual Basic). I really have no idea what the problem is.

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  • Enable Automatic Code First Migrations On SQL Database in Azure Web Sites

    - by Steve Michelotti
    Now that Azure supports .NET Framework 4.5, you can use all the latest and greatest available features. A common scenario is to be able to use Entity Framework Code First Migrations with a SQL Database in Azure. Prior to Code First Migrations, Entity Framework provided database initializers. While convenient for demos and prototypes, database initializers weren’t useful for much beyond that because, if you delete and re-create your entire database when the schema changes, you lose all of your operational data. This is the void that Migrations are meant to fill. For example, if you add a column to your model, Migrations will alter the database to add the column rather than blowing away the entire database and re-creating it from scratch. Azure is becoming increasingly easier to use – especially with features like Azure Web Sites. Being able to use Entity Framework Migrations in Azure makes deployment easier than ever. In this blog post, I’ll walk through enabling Automatic Code First Migrations on Azure. I’ll use the Simple Membership provider for my example. First, we’ll create a new Azure Web site called “migrationstest” including creating a new SQL Database along with it:   Next we’ll go to the web site and download the publish profile:   In the meantime, we’ve created a new MVC 4 website in Visual Studio 2012 using the “Internet Application” template. This template is automatically configured to use the Simple Membership provider. We’ll do our initial Publish to Azure by right-clicking our project and selecting “Publish…”. From the “Publish Web” dialog, we’ll import the publish profile that we downloaded in the previous step:   Once the site is published, we’ll just click the “Register” link from the default site. Since the AccountController is decorated with the [InitializeSimpleMembership] attribute, the initializer will be called and the initial database is created.   We can verify this by connecting to our SQL Database on Azure with SQL Management Studio (after making sure that our local IP address is added to the list of Allowed IP Addresses in Azure): One interesting note is that these tables got created with the default Entity Framework initializer – which is to create the database if it doesn’t already exist. However, our database did already exist! This is because there is a new feature of Entity Framework 5 where Code First will add tables to an existing database as long as the target database doesn’t contain any of the tables from the model. At this point, it’s time to enable Migrations. We’ll open the Package Manger Console and execute the command: PM> Enable-Migrations -EnableAutomaticMigrations This will enable automatic migrations for our project. Because we used the "-EnableAutomaticMigrations” switch, it will create our Configuration class with a constructor that sets the AutomaticMigrationsEnabled property set to true: 1: public Configuration() 2: { 3: AutomaticMigrationsEnabled = true; 4: } We’ll now add our initial migration: PM> Add-Migration Initial This will create a migration class call “Initial” that contains the entire model. But we need to remove all of this code because our database already exists so we are just left with empty Up() and Down() methods. 1: public partial class Initial : DbMigration 2: { 3: public override void Up() 4: { 5: } 6: 7: public override void Down() 8: { 9: } 10: } If we don’t remove this code, we’ll get an exception the first time we attempt to run migrations that tells us: “There is already an object named 'UserProfile' in the database”. This blog post by Julie Lerman fully describes this scenario (i.e., enabling migrations on an existing database). Our next step is to add the Entity Framework initializer that will automatically use Migrations to update the database to the latest version. We will add these 2 lines of code to the Application_Start of the Global.asax: 1: Database.SetInitializer(new MigrateDatabaseToLatestVersion<UsersContext, Configuration>()); 2: new UsersContext().Database.Initialize(false); Note the Initialize() call will force the initializer to run if it has not been run before. At this point, we can publish again to make sure everything is still working as we are expecting. This time we’re going to specify in our publish profile that Code First Migrations should be executed:   Once we have re-published we can once again navigate to the Register page. At this point the database has not been changed but Migrations is now enabled on our SQL Database in Azure. We can now customize our model. Let’s add 2 new properties to the UserProfile class – Email and DateOfBirth: 1: [Table("UserProfile")] 2: public class UserProfile 3: { 4: [Key] 5: [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)] 6: public int UserId { get; set; } 7: public string UserName { get; set; } 8: public string Email { get; set; } 9: public DateTime DateOfBirth { get; set; } 10: } At this point all we need to do is simply re-publish. We’ll once again navigate to the Registration page and, because we had Automatic Migrations enabled, the database has been altered (*not* recreated) to add our 2 new columns. We can verify this by once again looking at SQL Management Studio:   Automatic Migrations provide a quick and easy way to keep your database in sync with your model without the worry of having to re-create your entire database and lose data. With Azure Web Sites you can set up automatic deployment with Git or TFS and automate the entire process to make it dead simple.

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  • Don’t Program by Fear, Question Everything

    - by João Angelo
    Perusing some code base I’ve recently came across with a code comment that I would like to share. It was something like this: class Animal { public Animal() { this.Id = Guid.NewGuid(); } public Guid Id { get; private set; } } class Cat : Animal { public Cat() : base() // Always call base since it's not always done automatically { } } Note: All class names were changed to protect the innocent. To clear any possible doubts the C# specification explicitly states that: If an instance constructor has no constructor initializer, a constructor initializer of the form base() is implicitly provided. Thus, an instance constructor declaration of the form C(...) {...} is exactly equivalent to C(...): base() {...} So in conclusion it’s clearly an incorrect comment but what I find alarming is how a comment like that gets into a code base and survives the test of time. Not to forget what it can do to someone who is making a jump from other technologies to C# and reads stuff like that.

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  • Cucumber can't find installed gems

    - by artemave
    environment/cucumber.rb: ... # gem dependencies config.gem 'cucumber-rails', :lib => false, :version => '>=0.3.0' unless File.directory?(File.join(Rails.root, 'vend config.gem 'database_cleaner', :lib => false, :version => '>=0.5.0' unless File.directory?(File.join(Rails.root, 'vend config.gem 'webrat', :lib => false, :version => '>=0.7.0' unless File.directory?(File.join(Rails.root, 'vend config.gem 'spork', :lib => false, :version => '>=0.7.5' unless File.directory?(File.join(Rails.root, 'vend config.gem 'factory_girl', :source => 'http://gemcutter.org' config.gem 'selenium-client', :lib => false config.gem 'Selenium', :lib => false config.gem 'rspec', :lib => 'spec' config.gem 'rspec-rails', :lib => 'spec/rails' config.gem 'test-unit', :lib => false Running cucumber gives missing gems error: artem:~/projects/food4feed (master)$ cucumber ... no such file to load -- test-unit /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/polyglot-0.3.0/lib/polyglot.rb:65:in `require' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/polyglot-0.3.0/lib/polyglot.rb:65:in `require' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:158:in `require' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/rails-2.3.5/lib/rails/gem_dependency.rb:208:in `load' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/rails-2.3.5/lib/initializer.rb:307:in `block in load_gems' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/rails-2.3.5/lib/initializer.rb:307:in `each' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/rails-2.3.5/lib/initializer.rb:307:in `load_gems' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/rails-2.3.5/lib/initializer.rb:169:in `process' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/rails-2.3.5/lib/initializer.rb:113:in `run' /home/artem/projects/food4feed/config/environment.rb:9:in `<top (required)>' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/polyglot-0.3.0/lib/polyglot.rb:65:in `require' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/polyglot-0.3.0/lib/polyglot.rb:65:in `require' /home/artem/projects/food4feed/features/support/env.rb:12:in `block in <top (required)>' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/spork-0.8.1/lib/spork.rb:23:in `prefork' /home/artem/projects/food4feed/features/support/env.rb:10:in `<top (required)>' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/polyglot-0.3.0/lib/polyglot.rb:65:in `require' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/polyglot-0.3.0/lib/polyglot.rb:65:in `require' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/cucumber-0.6.3/lib/cucumber/rb_support/rb_language.rb:124:in `load_code_file' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/cucumber-0.6.3/lib/cucumber/step_mother.rb:85:in `load_code_file' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/cucumber-0.6.3/lib/cucumber/step_mother.rb:77:in `block in load_code_files' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/cucumber-0.6.3/lib/cucumber/step_mother.rb:76:in `each' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/cucumber-0.6.3/lib/cucumber/step_mother.rb:76:in `load_code_files' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/cucumber-0.6.3/lib/cucumber/cli/main.rb:48:in `execute!' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/cucumber-0.6.3/lib/cucumber/cli/main.rb:20:in `execute' /home/artem/.rvm/gems/ruby-1.9.1-p378/gems/cucumber-0.6.3/bin/cucumber:8:in `<top (required)>' /home/artem/.rvm/gems/ruby-1.9.1-p378/bin/cucumber:19:in `load' /home/artem/.rvm/gems/ruby-1.9.1-p378/bin/cucumber:19:in `<main>' Missing these required gems: selenium-client Selenium rspec-rails test-unit You're running: ruby 1.9.1.378 at /home/artem/.rvm/rubies/ruby-1.9.1-p378/bin/ruby rubygems 1.3.5 at /home/artem/.rvm/gems/ruby-1.9.1-p378, /home/artem/.rvm/gems/ruby-1.9.1-p378%global All gems are obviously there: artem:~/projects/food4feed (master)$ gem list | egrep "elenium|rspec|test-unit" rspec (1.3.0) rspec-rails (1.3.2) Selenium (1.1.14) selenium-client (1.2.18) test-unit (2.0.7) The even more confusing part is that it only complains about certain gems. factory_girl and rspec don't cause problems. Any idea what is going on? My environment: Rails 2.3.5 cucumber (0.6.3) cucumber-rails (0.3.0)

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  • "Malformed version number string mingw32" when starting rails

    - by Freewind
    My os: windows xp, ruby: 1.8.7, rails: 2.3.5 Everything was fine, but I just installed a "gcc-4.4.0-mingw32-bin", and run gem install rdiscount, then my rails can't start. Now when I run ruby script/server, or rake gems:install, the following error will occur: rake aborted! Malformed version number string mingw32 (See full trace by running task with --trace) E:\WORKSPACE_TOPCODER\wenda_ror>ruby script/server => Booting Mongrel => Rails 2.3.5 application starting on http://0.0.0.0:3000 E:/Ruby/ruby-187/lib/ruby/site_ruby/1.8/rubygems/version.rb:182:in `initialize': Malformed version number string mingw32 (ArgumentError) from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/vendor_gem_source_index.rb:105:in `new' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/vendor_gem_source_index.rb:105:in `version_for_dir' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/vendor_gem_source_index.rb:47:in `refresh!' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/vendor_gem_source_index.rb:45:in `each' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/vendor_gem_source_index.rb:45:in `refresh!' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/vendor_gem_source_index.rb:29:in `initialize' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:21:in `new' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:21:in `add_frozen_gem_path' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:298:in `add_gem_load_paths' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:132:in `process' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `send' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `run' from E:/WORKSPACE_TOPCODER/wenda_ror/config/environment.rb:9 from E:/Ruby/ruby-187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from E:/Ruby/ruby-187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from E:/Ruby/ruby-187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' Now I have re-installed my ruby and rails, but the same error still occurs. And I have searched in google, found no solution. It seems I have to re-install my windows xp. Somebody knows the reason? Help...

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  • rake db:migrate gives a uninitialized class variable @@configuration in Rails error

    - by PK
    uninitialized class variable @@configuration in Rails /usr/lib/ruby/gems/1.8/gems/rails-2.1.0/lib/initializer.rb:19:in `configuration' /usr/lib/ruby/gems/1.8/gems/thoughtbot-factory_girl-1.2.2/lib/factory_girl.rb:24 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require' This is the initial part of the enviroment.rb: RAILS_GEM_VERSION = '2.1.0' unless defined? RAILS_GEM_VERSION require File.join(File.dirname(__FILE__), 'boot') Rails::Initializer.run do |config| config.gem "oauth", :version => "0.2.7", :lib => "oauth"

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  • Returning a shared library symbol table

    - by joemoe
    For instance: void* sdl_library = dlopen("libSDL.so", RTLD_LAZY); void* initializer = dlsym(sdl_library,"SDL_Init"); Assuming no errors, initializer will point to the function SD_Init in the shared library libSDK.so. However this requires knowing the symbol "SDL_Init" exists. Is it possibly to query a library for all its symbols? Eg, in this case it would return SDL_Init, the function pointer, and any other symbols exported by libSDL.so.

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  • Format form fields for bootstrap using rails+nokogiri

    - by user1116573
    I have the following in an initializer in a rails app that uses Twitter bootstrap so that it removes the div.field_with_errors that rails applies when validation fails on a field but also the initializer adds the help/validation text after the erroneous input field: require 'nokogiri' ActionView::Base.field_error_proc = Proc.new do |html_tag, instance| html = %(<div class="field_with_errors">#{html_tag}</div>).html_safe form_fields = [ 'textarea', 'input', 'select' ] elements = Nokogiri::HTML::DocumentFragment.parse(html_tag).css("label, " + form_fields.join(', ')) elements.each do |e| if e.node_name.eql? 'label' html = %(#{e}).html_safe elsif form_fields.include? e.node_name if instance.error_message.kind_of?(Array) html = %(#{e}<span class="help-inline">&nbsp;#{instance.error_message.join(',')}</span>).html_safe else html = %(#{e}<span class="help-inline">&nbsp;#{instance.error_message}</span>).html_safe end end end html end This works fine but I also need to apply the .error class to the surrounding div.control-group for each error. My initializer currently gives the following output: <div class="control-group"> <label class="control-label" for="post_message">Message</label> <div class="controls"> <input id="post_message" name="post[message]" required="required" size="30" type="text" value="" /><span class="help-inline">&nbsp;can't be blank</span> </div> </div> but I need something adding to my initializer so that it adds the .error class to the div.control-group like so: <div class="control-group error"> <label class="control-label" for="post_message">Message</label> <div class="controls"> <input id="post_message" name="post[message]" required="required" size="30" type="text" value="" /><span class="help-inline">&nbsp;can't be blank</span> </div> </div> The solution will probably need to allow for the fact that each validation error could have more than one label and input that are all within the same div.control-group (eg radio buttons / checkboxes / 2 text fields side by side). I assume it needs some sort of e.at_xpath() to find the div.control-group parent and add the .error class to it but I'm not sure how to do this. Can anyone help? PS This may all be possible using the formtastic or simple_form gems but I'd rather just use my own html if possible. EDIT If I put e['class'] = 'foo' in the if e.node_name.eql? 'label' section then it applies the class to the label so I think I just need to find the parent tag of e and then apply an .error class to it but I can't figure out what the xpath would be to get from label to its div.control-group parent; no combination of dots, slashes or whatever seems to work but xpath isn't my strong point.

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  • These are few objective type questions which i was not able to find the solution [closed]

    - by Tarun
    1. Which of the following advantages does System.Collections.IDictionaryEnumerator provide over System.Collections.IEnumerator? a. It adds properties for direct access to both the Key and the Value b. It is optimized to handle the structure of a Dictionary. c. It provides properties to determine if the Dictionary is enumerated in Key or Value order d. It provides reverse lookup methods to distinguish a Key from a specific Value 2. When Implementing System.EnterpriseServices.ServicedComponent derived classes, which of the following statements are true? a. Enabling object pooling requires an attribute on the class and the enabling of pooling in the COM+ catalog. b. Methods can be configured to automatically mark a transaction as complete by the use of attributes. c. You can configure authentication using the AuthenticationOption when the ActivationMode is set to Library. d. You can control the lifecycle policy of an individual instance using the SetLifetimeService method. 3. Which of the following are true regarding event declaration in the code below? class Sample { event MyEventHandlerType MyEvent; } a. MyEventHandlerType must be derived from System.EventHandler or System.EventHandler<TEventArgs> b. MyEventHandlerType must take two parameters, the first of the type Object, and the second of a class derived from System.EventArgs c. MyEventHandlerType may have a non-void return type d. If MyEventHandlerType is a generic type, event declaration must use a specialization of that type. e. MyEventHandlerType cannot be declared static 4. Which of the following statements apply to developing .NET code, using .NET utilities that are available with the SDK or Visual Studio? a. Developers can create assemblies directly from the MSIL Source Code. b. Developers can examine PE header information in an assembly. c. Developers can generate XML Schemas from class definitions contained within an assembly. d. Developers can strip all meta-data from managed assemblies. e. Developers can split an assembly into multiple assemblies. 5. Which of the following characteristics do classes in the System.Drawing namespace such as Brush,Font,Pen, and Icon share? a. They encapsulate native resource and must be properly Disposed to prevent potential exhausting of resources. b. They are all MarshalByRef derived classes, but functionality across AppDomains has specific limitations. c. You can inherit from these classes to provide enhanced or customized functionality 6. Which of the following are required to be true by objects which are going to be used as keys in a System.Collections.HashTable? a. They must handle case-sensitivity identically in both the GetHashCode() and Equals() methods. b. Key objects must be immutable for the duration they are used within a HashTable. c. Get HashCode() must be overridden to provide the same result, given the same parameters, regardless of reference equalityl unless the HashTable constructor is provided with an IEqualityComparer parameter. d. Each Element in a HashTable is stored as a Key/Value pair of the type System.Collections.DictionaryElement e. All of the above 7. Which of the following are true about Nullable types? a. A Nullable type is a reference type. b. A Nullable type is a structure. c. An implicit conversion exists from any non-nullable value type to a nullable form of that type. d. An implicit conversion exists from any nullable value type to a non-nullable form of that type. e. A predefined conversion from the nullable type S? to the nullable type T? exists if there is a predefined conversion from the non-nullable type S to the non-nullable type T 8. When using an automatic property, which of the following statements is true? a. The compiler generates a backing field that is completely inaccessible from the application code. b. The compiler generates a backing field that is a private instance member with a leading underscore that can be programmatically referenced. c. The compiler generates a backing field that is accessible via reflection d. The compiler generates a code that will store the information separately from the instance to ensure its security. 9. Which of the following does using Initializer Syntax with a collection as shown below require? CollectionClass numbers = new CollectionClass { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; a. The Collection Class must implement System.Collections.Generic.ICollection<T> b. The Collection Class must implement System.Collections.Generic.IList<T> c. Each of the Items in the Initializer List will be passed to the Add<T>(T item) method d. The items in the initializer will be treated as an IEnumerable<T> and passed to the collection constructor+K110 10. What impact will using implicitly typed local variables as in the following example have? var sample = "Hello World"; a. The actual type is determined at compilation time, and has no impact on the runtime b. The actual type is determined at runtime, and late binding takes effect c. The actual type is based on the native VARIANT concept, and no binding to a specific type takes place. d. "var" itself is a specific type defined by the framework, and no special binding takes place 11. Which of the following is not supported by remoting object types? a. well-known singleton b. well-known single call c. client activated d. context-agile 12. In which of the following ways do structs differ from classes? a. Structs can not implement interfaces b. Structs cannot inherit from a base struct c. Structs cannot have events interfaces d. Structs cannot have virtual methods 13. Which of the following is not an unboxing conversion? a. void Sample1(object o) { int i = (int)o; } b. void Sample1(ValueType vt) { int i = (int)vt; } c. enum E { Hello, World} void Sample1(System.Enum et) { E e = (E) et; } d. interface I { int Value { get; set; } } void Sample1(I vt) { int i = vt.Value; } e. class C { public int Value { get; set; } } void Sample1(C vt) { int i = vt.Value; } 14. Which of the following are characteristics of the System.Threading.Timer class? a. The method provided by the TimerCallback delegate will always be invoked on the thread which created the timer. b. The thread which creates the timer must have a message processing loop (i.e. be considered a UI thread) c. The class contains protection to prevent reentrancy to the method provided by the TimerCallback delegate d. You can receive notification of an instance being Disposed by calling an overload of the Dispose method. 15. What is the proper declaration of a method which will handle the following event? Class MyClass { public event EventHandler MyEvent; } a. public void A_MyEvent(object sender, MyArgs e) { } b. public void A_MyEvent(object sender, EventArgs e) { } c. public void A_MyEvent(MyArgs e) { } d. public void A_MyEvent(MyClass sender,EventArgs e) { } 16. Which of the following scenarios are applicable to Window Workflow Foundation? a. Document-centric workflows b. Human workflows c. User-interface page flows d. Builtin support for communications across multiple applications and/or platforms e. All of the above 17. When using an automatic property, which of the following statements is true? a. The compiler generates a backing field that is completely inaccessible from the application code. b. The compiler generates a backing field that is a private instance member with a leading underscore that can be programmatically referenced. c. The compiler generates a backing field that is accessible via reflection d. The compiler generates a code that will store the information separately from the instance to ensure its security. 18 While using the capabilities supplied by the System.Messaging classes, which of the following are true? a. Information must be explicitly converted to/from a byte stream before it uses the MessageQueue class b. Invoking the MessageQueue.Send member defaults to using the System.Messaging.XmlMessageFormatter to serialize the object. c. Objects must be XMLSerializable in order to be transferred over a MessageQueue instance. d. The first entry in a MessageQueue must be removed from the queue before the next entry can be accessed e. Entries removed from a MessageQueue within the scope of a transaction, will be pushed back into the front of the queue if the transaction fails. 19. Which of the following are true about declarative attributes? a. They must be inherited from the System.Attribute. b. Attributes are instantiated at the same time as instances of the class to which they are applied. c. Attribute classes may be restricted to be applied only to application element types. d. By default, a given attribute may be applied multiple times to the same application element. 20. When using version 3.5 of the framework in applications which emit a dynamic code, which of the following are true? a. A Partial trust code can not emit and execute a code b. A Partial trust application must have the SecurityCriticalAttribute attribute have called Assert ReflectionEmit permission c. The generated code no more permissions than the assembly which emitted it. d. It can be executed by calling System.Reflection.Emit.DynamicMethod( string name, Type returnType, Type[] parameterTypes ) without any special permissions Within Windows Workflow Foundation, Compensating Actions are used for: a. provide a means to rollback a failed transaction b. provide a means to undo a successfully committed transaction later c. provide a means to terminate an in process transaction d. achieve load balancing by adapting to the current activity 21. What is the proper declaration of a method which will handle the following event? Class MyClass { public event EventHandler MyEvent; } a. public void A_MyEvent(object sender, MyArgs e) { } b. public void A_MyEvent(object sender, EventArgs e) { } c. public void A_MyEvent(MyArgs e) { } d. public void A_MyEvent(MyClass sender,EventArgs e) { } 22. Which of the following controls allows the use of XSL to transform XML content into formatted content? a. System.Web.UI.WebControls.Xml b. System.Web.UI.WebControls.Xslt c. System.Web.UI.WebControls.Substitution d. System.Web.UI.WebControls.Transform 23. To which of the following do automatic properties refer? a. You declare (explicitly or implicitly) the accessibility of the property and get and set accessors, but do not provide any implementation or backing field b. You attribute a member field so that the compiler will generate get and set accessors c. The compiler creates properties for your class based on class level attributes d. They are properties which are automatically invoked as part of the object construction process 24. Which of the following are true about Nullable types? a. A Nullable type is a reference type. b. An implicit conversion exists from any non-nullable value type to a nullable form of that type. c. A predefined conversion from the nullable type S? to the nullable type T? exists if there is a predefined conversion from the non-nullable type S to the non-nullable type T 25. When using an automatic property, which of the following statements is true? a. The compiler generates a backing field that is completely inaccessible from the application code. b. The compiler generates a backing field that is accessible via reflection. c. The compiler generates a code that will store the information separately from the instance to ensure its security. 26. When using an implicitly typed array, which of the following is most appropriate? a. All elements in the initializer list must be of the same type. b. All elements in the initializer list must be implicitly convertible to a known type which is the actual type of at least one member in the initializer list c. All elements in the initializer list must be implicitly convertible to common type which is a base type of the items actually in the list 27. Which of the following is false about anonymous types? a. They can be derived from any reference type. b. Two anonymous types with the same named parameters in the same order declared in different classes have the same type. c. All properties of an anonymous type are read/write. 28. Which of the following are true about Extension methods. a. They can be declared either static or instance members b. They must be declared in the same assembly (but may be in different source files) c. Extension methods can be used to override existing instance methods d. Extension methods with the same signature for the same class may be declared in multiple namespaces without causing compilation errors

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  • Automatic Properties, Collection Initializers, and Implicit Line Continuation support with VB 2010

    - by ScottGu
    [In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu] This is the eighteenth in a series of blog posts I’m doing on the upcoming VS 2010 and .NET 4 release. A few days ago I blogged about two new language features coming with C# 4.0: optional parameters and named arguments.  Today I’m going to post about a few of my favorite new features being added to VB with VS 2010: Auto-Implemented Properties, Collection Initializers, and Implicit Line Continuation support. Auto-Implemented Properties Prior to VB 2010, implementing properties within a class using VB required you to explicitly declare the property as well as implement a backing field variable to store its value.  For example, the code below demonstrates how to implement a “Person” class using VB 2008 that exposes two public properties - “Name” and “Age”:   While explicitly declaring properties like above provides maximum flexibility, I’ve always found writing this type of boiler-plate get/set code tedious when you are simply storing/retrieving the value from a field.  You can use VS code snippets to help automate the generation of it – but it still generates a lot of code that feels redundant.  C# 2008 introduced a cool new feature called automatic properties that helps cut down the code quite a bit for the common case where properties are simply backed by a field.  VB 2010 also now supports this same feature.  Using the auto-implemented properties feature of VB 2010 we can now implement our Person class using just the code below: When you declare an auto-implemented property, the VB compiler automatically creates a private field to store the property value as well as generates the associated Get/Set methods for you.  As you can see above – the code is much more concise and easier to read. The syntax supports optionally initializing the properties with default values as well if you want to: You can learn more about VB 2010’s automatic property support from this MSDN page. Collection Initializers VB 2010 also now supports using collection initializers to easily create a collection and populate it with an initial set of values.  You identify a collection initializer by declaring a collection variable and then use the From keyword followed by braces { } that contain the list of initial values to add to the collection.  Below is a code example where I am using the new collection initializer feature to populate a “Friends” list of Person objects with two people, and then bind it to a GridView control to display on a page: You can learn more about VB 2010’s collection initializer support from this MSDN page. Implicit Line Continuation Support Traditionally, when a statement in VB has been split up across multiple lines, you had to use a line-continuation underscore character (_) to indicate that the statement wasn’t complete.  For example, with VB 2008 the below LINQ query needs to append a “_” at the end of each line to indicate that the query is not complete yet: The VB 2010 compiler and code editor now adds support for what is called “implicit line continuation support” – which means that it is smarter about auto-detecting line continuation scenarios, and as a result no longer needs you to explicitly indicate that the statement continues in many, many scenarios.  This means that with VB 2010 we can now write the above code with no “_” at all: The implicit line continuation feature also works well when editing XML Literals within VB (which is pretty cool). You can learn more about VB 2010’s Implicit Line Continuation support and many of the scenarios it supports from this MSDN page (scroll down to the “Implicit Line Continuation” section to find details). Summary The above three VB language features are but a few of the new language and code editor features coming with VB 2010.  Visit this site to learn more about some of the other VB language features coming with the release.  Also subscribe to the VB team’s blog to learn more and stay up-to-date with the posts they the team regularly publishes. Hope this helps, Scott

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  • Should a Perl constructor return an undef or a "invalid" object?

    - by DVK
    Question: What is considered to be "Best practice" - and why - of handling errors in a constructor?. "Best Practice" can be a quote from Schwartz, or 50% of CPAN modules use it, etc...; but I'm happy with well reasoned opinion from anyone even if it explains why the common best practice is not really the best approach. As far as my own view of the topic (informed by software development in Perl for many years), I have seen three main approaches to error handling in a perl module (listed from best to worst in my opinion): Construct an object, set an invalid flag (usually "is_valid" method). Often coupled with setting error message via your class's error handling. Pros: Allows for standard (compared to other method calls) error handling as it allows to use $obj->errors() type calls after a bad constructor just like after any other method call. Allows for additional info to be passed (e.g. 1 error, warnings, etc...) Allows for lightweight "redo"/"fixme" functionality, In other words, if the object that is constructed is very heavy, with many complex attributes that are 100% always OK, and the only reason it is not valid is because someone entered an incorrect date, you can simply do "$obj->setDate()" instead of the overhead of re-executing entire constructor again. This pattern is not always needed, but can be enormously useful in the right design. Cons: None that I'm aware of. Return "undef". Cons: Can not achieve any of the Pros of the first solution (per-object error messages outside of global variables and lightweight "fixme" capability for heavy objects). Die inside the constructor. Outside of some very narrow edge cases, I personally consider this an awful choice for too many reasons to list on the margins of this question. UPDATE: Just to be clear, I consider the (otherwise very worthy and a great design) solution of having very simple constructor that can't fail at all and a heavy initializer method where all the error checking occurs to be merely a subset of either case #1 (if initializer sets error flags) or case #3 (if initializer dies) for the purposes of this question. Obviously, choosing such a design, you automatically reject option #2.

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  • Cucumber-rails on jruby installs gem into my apps root directory with bundler

    - by brad
    Just installed cucumber 0.7.2 and cucumber-rails 0.3.1 with jruby-1.4.0 on OSX. When I run a bundle install, it places a cucumber-rails directory in my main app with all of the gem code/dependencies. First off, this is definitely not what I want and I'm not sure why this happens for cucumber-rails only. Second, if I delete this folder and just manually install cucumber-rails, when I run script/generate feature blah I get /Users/bradrobertson/.rvm/rubies/jruby-1.4.0/lib/ruby/site_ruby/1.8/rubygems/source_index.rb:344:in `refresh!': source index not created from disk (RuntimeError) from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/rails/vendor_gem_source_index.rb:34:in `refresh!' from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/rails/vendor_gem_source_index.rb:29:in `initialize' from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/rails/gem_dependency.rb:21:in `new' from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/rails/gem_dependency.rb:21:in `add_frozen_gem_path' from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/initializer.rb:298:in `add_gem_load_paths' from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/initializer.rb:132:in `process' from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/initializer.rb:113:in `run' from /Users/bradrobertson/Repos/app/source/trunk/config/environment.rb:13 from /Users/bradrobertson/Repos/app/source/trunk/config/environment.rb:1:in `require' from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/commands/generate.rb:1 from /Users/bradrobertson/.rvm/gems/jruby-1.4.0/gems/rails-2.3.5/lib/commands/generate.rb:3:in `require' from script/generate:3 Similarly running rake cucumber I get rake aborted! source index not created from disk So something obviously doesn't work. If I add that cucumber-rails directory back in, then my rake cucumber actually runs. Can someone tell me why it would need to install the gem right in my rails app? I've never seen this before. setup jruby-1.4.0 cucumber-0.7.2 cucumber-rails 0.3.1 bundler 0.9.23 webrat 0.7.1

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  • action mailer gem and tlsmail gem not working in heroku after GIT PUSH HEROKU

    - by user163352
    I'm using heroku as my host..It was working fine. Then I installed action_mailer_tls and tlsmail. Then I comitted it and pushed it heroku.. After that I got error in myapp.heroku.com. The error is /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require': no such file to load -- smtp_tls (MissingSourceFile) from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:inrequire' from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.3/lib/active_support/dependencies.rb:158:in require' from /disk1/home/slugs/154378_e47562d_b59c/mnt/config/initializers/smtp_gmail.rb:3 from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.3/lib/active_support/dependencies.rb:147:inload_without_new_constant_marking' from /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.3/lib/active_support/dependencies.rb:147:in load' from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.3/lib/initializer.rb:622:inload_application_initializers' from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.3/lib/initializer.rb:621:in each' from /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.3/lib/initializer.rb:621:inload_application_initializers' ... 19 levels... from /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/builder.rb:29:in instance_eval' from /usr/local/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/builder.rb:29:ininitialize' from /home/heroku_rack/heroku.ru:1:in `new' from /home/heroku_rack/heroku.ru:1 Do I need to push the gems..If so I tried git add .gems It also gives fatal error. any suggestion would be greatly appreciated.

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  • TF30004: The New Team Project Wizard encountered an unexpected error while initializing the Microsof

    - by Frozzare
    Hello, i get this error when i trying to create a new project in team project. The server is right, i check all ports. I don't now what i should do now, can't find any good information 2009-09-19 01:45:41Z | Module: Internal | Team Foundation Server proxy retrieved | Completion time: 0.338 seconds 2009-09-19 01:45:41Z | Module: Internal | The template information for Team Foundation Server "TFSServer01" was retrieved from the Team Foundation Server. | Completion time: 0.099 seconds 2009-09-19 01:45:41Z | Module: Wizard | Retrieved IAuthorizationService proxy | Completion time: 0.404 seconds 2009-09-19 01:45:41Z | Module: Wizard | TF30227: Project creation permissions retrieved | Completion time: 0.015 seconds 2009-09-19 01:45:44Z | Module: Engine | Thread: 5 | New project will be created with the "MSF for Agile Software Development - v4.2" methodology 2009-09-19 01:45:44Z | Module: Engine | Retrieved IAuthorizationService proxy | Completion time: 0 seconds 2009-09-19 01:45:44Z | Module: Engine | TF30227: Project creation permissions retrieved | Completion time: 0.01 seconds 2009-09-19 01:45:45Z | Module: Engine | Wrote compressed process template file | Completion time: 0.001 seconds 2009-09-19 01:45:46Z | Module: Engine | Extracted process template file | Completion time: 1.428 seconds 2009-09-19 01:45:46Z | Module: Engine | Thread: 5 | Starting Project Creation for project "TestProject" in domain "TFSServer01" 2009-09-19 01:45:46Z | Module: Engine | The user identity information was retrieved from the Group Security Service | Completion time: 0.045 seconds 2009-09-19 01:45:46Z | Module: Initializer | Thread: 5 | The New Team Project Wizard is starting to initialize the plug-ins. 2009-09-19 01:45:46Z | Module: CssStructureUploader | Thread: 5 | Entering Initialize in CssStructureUploader 2009-09-19 01:45:46Z | Module: CssStructureUploader | Thread: 5 | Initialize for CssStructureUploader complete 2009-09-19 01:45:46Z | Module: Initializer | Thread: 5 | The New Team Project Wizard successfully Initialized the plug-in Microsoft.ProjectCreationWizard.Classification. 2009-09-19 01:45:46Z | Module: Rosetta | Thread: 5 | Entering Initialize in RosettaReportUploader 2009-09-19 01:45:48Z | Module: Rosetta | Thread: 5 | Exiting Initialize for RosettaReportUploader 2009-09-19 01:45:48Z | Module: Initializer | Thread: 5 | The New Team Project Wizard successfully Initialized the plug-in Microsoft.ProjectCreationWizard.Reporting. 2009-09-19 01:45:48Z | Module: WSS | Thread: 5 | Entering Initialize in WssSiteCreator 2009-09-19 01:45:48Z | Module: WSS | Thread: 5 | Site information: Title = "TestProject" Description = "This team project was created based on the 'MSF for Agile Software Development - v4.2' process template." 2009-09-19 01:45:48Z | Module: WSS | Thread: 5 | Base site url: http://TFSServer01:14143/webbplatser 2009-09-19 01:45:48Z | Module: WSS | Thread: 5 | Admin site url: http://TFSServer01:16183/_vti_adm/admin.asmx ---begin Exception entry--- Time: 2009-09-19 01:46:27 Z Module: Initialize Event Description: TF30207: Initialization for plugin "Microsoft.ProjectCreationWizard.Portal 'failed Exception Type: Microsoft.TeamFoundation.Client.PcwException Exception Message: The client discovered that content-type of request is text / html; charset = utf-8, but the text / xml expected. The request failed with error message: -- Unable to connect to the configuration database. --. Stack Trace: vid Microsoft.VisualStudio.TeamFoundation.WssSiteCreator.CheckPermissions(ProjectCreationContext ctxt) vid Microsoft.VisualStudio.TeamFoundation.WssSiteCreator.Initialize(ProjectCreationContext context) vid Microsoft.VisualStudio.TeamFoundation.EngineStarter.InitializePlugins(MsfTemplate template, PcwPluginCollection pluginCollection) -- Inner Exception -- Exception Type: System.InvalidOperationException Exception Message: The client discovered that content-type of request is text / html; charset = utf-8, but the text / xml expected. The request failed with error message: -- Unable to connect to the configuration database. --. Stack Trace: vid System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) vid System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) vid Microsoft.TeamFoundation.Proxy.Portal.Admin.GetLanguages() vid Microsoft.VisualStudio.TeamFoundation.WssSiteCreator.CheckPermissions(ProjectCreationContext ctxt) -- end Inner Exception -- --- end Exception entry --- Thanks for you help

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  • Sharepoint Document Library not receiving emails

    - by ria
    I have created a sharepoint document library which is email enabled. However when i send email to the designated email address from anywhere, i dont receive the email & attachment in the list. I have done some R&D and i hv found that in order to receive email from anywhere i have to expose my DNS of the sharepoint site to the outside world. Now i dont know whether it applies to the email address designated to me in the Active directory profile as well (my company domain email address). How to test that this email reception is working in the document library? I have tried sending an email from the sharepoint site and it works fine so the SMTP settings are correctly done.

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  • No communication on my VLAN?

    - by Donovan
    I am using a Netgear FSM7328S switch and have designated ports 19-24 as being part of VLAN # 3. I designated them all as untagged because I do not want them to switch traffic to any other port on the switch. I also removed them from the default, untagged, VLAN 1. My issue is that none of the ports 19-24 will communicate with eachother. My laptop plugged in with wireshark shows no switched traffic what so ever. Have I configured it wrong? Thanks, D

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