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  • How do you pass self to class_eval in ruby?

    - by klochner
    I'm working on a metaprogramming task, where I'm trying to use a single method to define a polymorphic association in the calling class, while also defining the association in the target class. I need to pass in the name of the calling class to get the association right. Here's a snippet that should get the idea across: class SomeClass < ActiveRecord::Base has_many :join_models, :dependent=:destroy end class JoinModel < ActiveRecord::Base belongs_to :some_class belongs_to :entity, :polymorphic=true end module Foo module ClassMethods def acts_as_entity has_many :join_models, :as=:entity, :dependent=:destroy has_many :some_classes, :through=:join_models klass = self.name.tableize SomeClass.class_eval "has_many :#{klass}, :through=:join_models" end end end I'd like to eliminate the klass= line, but don't know how else to pass a reference to self from the calling class into class_eval. any suggestions?

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  • Ruby (with Rails) convert a string of time into seconds?

    - by Ryan
    So, I've got a string of time... something along the lines of '4 hours' '48 hours' '3 days' '15 minutes' I would like to convert those all into seconds. For '4 hours', this works fine Time.parse('4 hours').to_i - Time.prase('0 hours').to_i => 14400 # 4 hours in seconds, yay However, this doesn't work for 48 hours (outside of range error). It also does not work for 3 days (no information error), etc. Is there a simple way to convert these strings into seconds?

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  • How can I configure Devise for Ruby on Rails to store the emails and passwords somewhere other than in the user model?

    - by TLK
    I'd like to store emails in a separate table and allow users to save multiple emails and log in with any of them. I'd also like to store passwords in a different table. How can I configure Devise to store authentication info elsewhere? Worst case scenario, if I just have to hack into it, is there a generator to just port everything over to the app? I noticed there was a generator for the views. Thanks.

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  • Ruby on Rails: temporarily update an attribute into cache without saving it?

    - by randombits
    I have a bit of code that depicts this hypothetical setup below. A class Foo which contains many Bars. Bar belongs to one and only one Foo. At some point, Foo can do a finite loop that lapses 2+ iterations. In that loop, something like the following happens: bar = Bar.find_where_in_use_is_zero bar.in_use = 1 Basically what find_where_in_use_is_zero does something like this in as far as SQL goes: SELECT * from bars WHERE in_use = 0 Now the problem I'm facing is that I cannot run the following line of code after bar.in_use =1 is invoked: bar.save The reason is clear, I'm still looping and the new Foo hasn't been created, so we don't have a foo_id to put into bars.foo_id. Even if I set to allow foo_id to be NULL, we have a problem where one of the bars can fail validation and the existing one was saved to the database. In my application, that doesn't work. The entire request is atomic, either all succeeds or fails together. What happens next, is that in my loop, I have the potential to select the same exact bar that I did on a previous iteration of the loop since the in_use flag will not be set to 1 until @foo.save is called. Is there anyway to work around this condition and temporarily set the in_use attribute to 1 for subsequent iterations of the loop so that I retrieve an available bar instance?

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  • Pros & Cons of separating the controllers using subfolders on an ruby on rails app based?

    - by user293179
    Hi, Need some help gathering thoughts on this issue. Our team is moving ahead with the idea that separating the authenticated and public sections of our app in two separate folders will allow us to be more organized and secured. I have seen this approach for Admin apps within the site but never for authentication. We are currently using Authlogic. What would be the disadvantage of this? Thanks for your help.

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  • In ruby on rails, is it possible to do a sum query with group by using the find_each batching?

    - by BarryOg
    I'm loading data from my database and I'm doing a sum calculation with a group by. ElectricityReading.sum(:electricity_value, :group => "electricity_timestamp", :having => ["electricity_timestamp = '2010-02-14 23:30:00'"]) My data sets are extremely large, 100k upwards so I was wondering if its possible to use the find_each to batch this to help with memory overhead. I can write the batching manually use limit and offset I guess but I'd like to avoid that if the code already exists.

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  • How to sort a hash by value in descending order and output a hash in ruby?

    - by tipsywacky
    output.sort_by {|k, v| v}.reverse and for keys h = {"a"=>1, "c"=>3, "b"=>2, "d"=>4} => {"a"=>1, "c"=>3, "b"=>2, "d"=>4} Hash[h.sort] Right now I have these two. But I'm trying to sort hash in descending order by value so that it will return => {"d"=>4, "c"=>3, "b"=>2, "a"=>1 } Thanks in advance. Edit: let me post the whole code. def count_words(str) # YOUR CODE HERE output = Hash.new(0) sentence = str.gsub(/,/, "").gsub(/'/,"").gsub(/-/, "").downcase words = sentence.split() words.each do |item| output[item] += 1 end puts Hash[output.sort_by{ |_, v| -v }] return Hash[output.sort_by{|k, v| v}.reverse] end

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  • a young intellect asks: Python or Ruby for freelance?

    - by Sophia
    Hello, I'm Sophia. I have an interest in self-learning either Python, or Ruby. The primary reason for my interest is to make my life more stable by having freelance work = $. It seems that programming offers a way for me to escape my condition of poverty (I'm on the edge of homelessness right now) while at the same time making it possible for me to go to uni. I intend on being a math/philosophy major. I have messed with Python a little bit in the past, but it didn't click super well. The people who say I should choose Python say as much because it is considered a good first language/teaching language, and that it is general-purpose. The people who say I should choose Ruby point out that I'm a very right-brained thinker, and having multiple ways to do something will make it much easier for me to write good code. So, basically, I'm starting this thread as a dialog with people who know more than I do, as an attempt to make the decision. :-) I've thought about asking this in stackoverflow, but they're much more strict about closing threads than here, and I'm sort of worried my thread will be closed. :/ TL;DR Python or Ruby for freelance work opportunities ($) as a first language? Additional question (if anyone cares to answer): I have a personal feeling that if I devote myself to learning, I'd be worth hiring for a project in about 8 weeks of work. I base this on a conservative estimate of my intellectual capacities, as well as possessing motivation to improve my life. Is my estimate necessarily inaccurate? random tidbit: I'm in Portland, OR I'll answer questions that are asked of me, if I can help the accuracy and insight contained within the dialog.

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  • vim + Ruby on Rails: how do you bounce among those 4-5 files you're currently working on?

    - by glitch
    I'm just starting to get familiar with vim, and I'd like to use it as my primary Rails development tool. As a Visual Studio and RubyMine user, I find a lot of stuff to be missing from the barebones vim installation, and therefore I went ahead and attempted to soup it up with plugins such as: rails.vim tcomment ruby-vim NERDtree and a couple of others. The issue is that I still don't quite get the average work-flow of using vim as one's Rails IDE. In RubyMine (again, similarly to Visual Studio) I have a series of tabs always open, containing the main files I'm switching among, and I additionally use NERDtree to open files from the folder structure. I tried opening them as new tabs, but the tab system in vim is just a lot more awkward than that in real IDEs. (I haven't seen vim pros in action, but I imagine that they'd not be relying on tabs, but using numerous splits instead, keeping at least a couple of files per split and switching between them with CTRL + ^. Is that the case?) So, at the end of the day, how do I really squeeze the most from vim if I want to be able to quickly access several files at once? Thank you!

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  • Should I use Windows deployment server to deploy Windows 7?

    - by Scottio
    Hi all, I've installed the Windows Deployment Server role on to Windows 2008 R2, I've found the Windows PE .wim file from the Windows 7 AIK and added it to my deployment server. On a client I can now do a network boot and have the Windows PE image load, now on my previous Windows 2003 Deployment Server I'd type WDSCapture and upload the Windows client to the server but WDSCapture is no longer present. Am I missing something? Should I be using Windows Deployment Server for Windows 7? Many thanks Scott

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  • How to connect from ruby to MS Sql Server

    - by apetrov
    Hi Crowd! I'm trying to connect to the sql server 2005 database from *NIX machine: I have the following configuration: Linux 64bit ruby -v ruby 1.8.6 (2007-09-24 patchlevel 111) [x86_64-linux] important gems: dbd-odbc (0.2.4) dbi (0.4.1) active record sql server adapter - as plugin ruby-odbc 0.9996 (installed without any options.) unixODBC is installed freeTDS is installed cat /etc/odbcinst.ini [FreeTDS] Description = TDS driver (Sybase/MS SQL) Driver = /usr/lib/libtdsodbc.so Setup = /usr/lib/odbc/libtdsS.so CPTimeout = CPReuse = FileUsage = 1 DSN: DRIVER=FreeTDS;TDS_Version=8.0;SERVER=XXXX;DATABASE=XXX;Port=1433;uid=XXX;pwd=XXXX;" or DRIVER=/usr/lib/libtdsodbc.so;TDS_Version=8.0;SERVER=XXXX;DATABASE=XXX;Port=1433;uid=XXX;pwd=XXXX;" I receive the following error: >>ActiveRecord::Base.sqlserver_connection({"mode"=>"ODBC", "adapter"=>"sqlserver", "dsn"=>my_dns) DBI::DatabaseError: IM002 (0) [unixODBC][Driver Manager]Data source name not found, and no default driver specified from /usr/lib/ruby/1.8/DBD/ODBC/ODBC.rb:95:in `connect' from /usr/lib/ruby/1.8/dbi.rb:424:in `connect' from /usr/lib/ruby/1.8/dbi.rb:215:in `connect' from /opt/ublip/rails/current/vendor/plugins/activerecord-sqlserver-adapter/lib/active_record/connection_adapters/sqlserver_adapter.rb:47:in `sqlserver_connection' It looks like ODBC unable to find appropriate ODBC driver, but I have no ideas why. I had a problem with /usr/lib/libtdsodbc.so which is empty in default debian package free-tds dev, but i solved it with remove broken package and installation from sources. Will appreciate any thought! Thanks & Regards Note: I'm albe to connect using the same steps on mac 10.5

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  • Multiple Ruby versions on one webserver?

    - by Legion
    The Ideal Using rvm, it would be awesome to be able to have multiple Rubies on one webserver, and through some sort of server configuration, be able to assign Ruby versions to different Rails/Sinatra/etc apps on a per-project basis. I am aware, from rvm's documentation, that Passenger only works with one Ruby at a time. :( The Compromise Failing that, it would be nice to at least be able to concoct a way to be able to assign projects to a Ruby 1.8 or a Ruby 1.9 interpreter. I've read that using Nginx as a reverse proxy allows running Apache and Nginx on the same box. Would it then be possible to have Apache+Passenger using one Ruby, and Nginx+Passenger using a different one? Maybe use something other than Passenger with Nginx? Am I Barking Up the Wrong Tree? Am I missing a good solution to this issue? Am I walking into a nightmare configuration situation? Is what I want even viable, or is it necessary to run another box to run a separate Ruby version?

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  • Ruby Gem Install question + answer(on windows vista Home Basic environment)

    - by Vamsi
    Recently I am having problems with installing rcov gem on my windows (vista Home Basic environment), so after googling I found one solution and that is gem install rcov -v 0.8.1.1.0 #version that installs without errors gem update rcov #update to the latest version, in my case rcov-0.8.1.2.0-x86-mswin32 But this solution didn't worked on my colleague's system (windows xp) and after that we came to know about RubyInstaller devkit for winddows But that dev kit is not working on my vista, when I tried gem install rcov in my command prompt, it game me this error, C:\Users\Vamsi>gem install rcov Building native extensions. This could take a while... ERROR: Error installing rcov: ERROR: Failed to build gem native extension.ERROR: Failed to build gem native extension. D:/Spritle/Programs/Ruby/bin/ruby.exe extconf.rb creating Makefile nmake 'nmake' is not recognized as an internal or external command, operable program or batch file. Gem files will remain installed in D:/Spritle/Programs/Ruby/lib/ruby/gems/1.8/ge ms/rcov-0.9.8 for inspection. Results logged to D:/Spritle/Programs/Ruby/lib/ruby/gems/1.8/gems/rcov-0.9.8/ext /rcovrt/gem_make.out So after that my colleague tried to install nmake as well but it was throwing some other error. Can some one suggest a better solution for solving this problems for all windows environments? I am aware of cygwin for windows but I am not sure that is an 100% solution either.

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  • What do I need to change to get this 'acts_as_rateable' Rails plugin working with this code from the

    - by tepidsam
    Hello! I'm working my way through the 'Foundation Rails 2' book. In Chapter 9, we are building a little "plugins" app. In the book, he installs the acts_as_rateable plugin found at http://juixe.com/svn/acts_as_rateable. This plugin doesn't appear to exist in 2010 (the page for this "old" plugin seems to be working again...it was down when I tried it earlier), so I found another acts_as_rateable plugin at http://github.com/azabaj/acts_as_rateable. These plugins are different and I'm trying to get the "new" plugin working with the code/project/app from the Foudations 2 book. I was able to use the migration generator included with the "new" plugin and it worked. Now,though, I'm a bit confused. In the book, he has us create a new controller to work with the plugin (the old plugin). Here's the code for that: class RatingsController < ApplicationController def create @plugin = Plugin.find(params[:plugin_id]) rating = Rating.new(:rating => params[:rating]) @plugin.ratings << average_rating redirect_to @plugin end end Then he had us change the routing: map.resources :plugins, :has_many => :ratings map.resources :categories map.root :controller => 'plugins' Next, we modified the following to the 'show' template so that it looks like this: <div id="rate_plugin"> <h2>Rate this plugin</h2> <ul class="star-rating"> <li> <%= link_to "1", @plugin.rate_it(1), :method => :post, :title => "1 star out of 5", :class => "one-star" %> </li> <li> <%= link_to "2", plugin_ratings_path(@plugin, :rating => 2), :method => :post, :title => "2 stars out of 5", :class => "two-stars" %> </li> <li> <%= link_to "3", plugin_ratings_path(@plugin, :rating => 3), :method => :post, :title => "3 stars out of 5", :class => "three-stars" %> </li> <li> <%= link_to "4", plugin_ratings_path(@plugin, :rating => 4), :method => :post, :title => "4 stars out of 5", :class => "four-stars" %> </li> <li> <%= link_to "5", plugin_ratings_path(@plugin, :rating => 5), :method => :post, :title => "5 stars out of 5", :class => "five-stars" %> </li> </ul> </div> The problem is that we're using code for a different plugin. When I try to actually "rate" one of the plugins, I get an "unknown attribute" error. That makes sense. I'm using attribute names for the "old" plugin, but I should be using attributes names for the "new" plugin. The problem is...I've tried using a variety of different attribute names and I keep getting the same error. From the README for the "new" plugin, I think I should be using some of these but I haven't been able to get them working: Install the plugin into your vendor/plugins directory, insert 'acts_as_rateable' into your model, then restart your application. class Post < ActiveRecord::Base acts_as_rateable end Now your model is extended by the plugin, you can rate it ( 1-# )or calculate the average rating. @plugin.rate_it( 4, current_user.id ) @plugin.average_rating #=> 4.0 @plugin.average_rating_round #=> 4 @plugin.average_rating_percent #=> 80 @plugin.rated_by?( current_user ) #=> rating || false Plugin.find_average_of( 4 ) #=> array of posts See acts_as_rateable.rb for further details! I'm guessing that I might have to make some "bigger" changes to get this plugin working. I'm asking this question to learn and only learn. The book gives code to get things working with the old plugin, but if one were actually building this app today it would be necessary to use this "new" plugin, so I would like to see how it could be used. Cheers! Any ideas on what I could change to get the "new" plugin working?

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  • Troubles installing/starting Redis via Resque

    - by Craig Flannagan
    Trying to complete instructions for Resque/Redis installation here: https://github.com/defunkt/resque/blob/master/README.markdown Am stuck at where I'm trying to start up Redis via Resque at the following command: Craig:/usr/local/src/resque$ rake redis:start (in /usr/local/src/resque) Detach with Ctrl+\ Re-attach with rake redis:attach ../../bin/dtach -A /tmp/redis.dtach ../../bin/redis-server ../../../etc/redis.conf rake aborted! Command failed with status (127): [../../bin/dtach -A /tmp/redis.dtach ../../...] (See full trace by running task with --trace) Rerunning with --trace (showing only part of trace): Craig:/usr/local/src/resque$ rake redis:start --trace (in /usr/local/src/resque) ** Invoke redis:start (first_time) ** Execute redis:start Detach with Ctrl+\ Re-attach with rake redis:attach ../../bin/dtach -A /tmp/redis.dtach ../../bin/redis-server ../../../etc/redis.conf rake aborted! Command failed with status (127): [../../bin/dtach -A /tmp/redis.dtach ../../...] /Users/craigflannagan/.rvm/gems/ruby-1.9.2-head@foo/gems/rake-0.8.7/lib/rake.rb:995:in `block in sh' Not sure what is wrong here - by the way, when I did those instructions $ git clone git://github.com/defunkt/resque.git $ cd resque $ PREFIX=<your_prefix> rake redis:install dtach:install $ rake redis:start I wasn't sure whether or not I was supposed to be doing #1 from within the Rails project, or if I was supposed to have the git clone create a new folder outside the Rails project (in this case, I chose to have folder created outside the project).

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  • cfengine3 file_copy only on source side change

    - by megamic
    I am using the 'digest' copy method for all file copy promises, because of the way we package and deploy software, I cant rely on mtime for the criteria for updating files. For various reasons, I am not employing the client-server approach with a central configuration server: rather we package and deploy our entire configuration module to each server, so from cf-engine's perspective, the source and target are local on the server it is running. The problem I am having with this approach is that the source will always update the target when they differ - which is what I want most of the time, usually because the source has been updated. However, like many other cfengine users, we are running an operational environment, where occasionally emergency fixes have to be applied immediately - meaning we don't have time to rebuild and redeploy a configuration module, and the fix will often be applied by deploying a tarball with specific changes. Of course this is problematic if cf-engine comes along 5 mintues later and reverts the changes. What we would like is to be able to make small, incremental changes to our servers, without them being reverted, until the next deployment cycle at which time the new source files would be copied. We do not consider random file corruption or mistaken changes to involve enough risk to warrant having cfengine constantly revert deployments to their source copy - the ability to deploy emergency fixes and have them stay that way until the next deployment would be of much greater value and utility. So, after all that, my question is this: is cf-engine capable of detecting whether it was the source or target that changed when the files differ, and if so, is their a way to use the 'digest' copy method but only if the source side changed? I am very open to other ideas and approaches as-well, as I am still quite new to this whole configuration management thing.

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  • Reverse Proxy (mod_rewrite) and Rails (absolute paths)

    - by SooDesuNe
    I have front end rails app, that reverse proxies to any of a number of backend rails apps depending on URL, for example http://www.my_host.com/app_one reverse proxies to http://www.remote_host_running_app_one.com such that a URL like http://www.my_host.com/app_one/users will display the contents of http://www.remote_host_running_app_one.com/users I have a large, and ever expanding number of backends, so they can not be explicitly listed anywhere other than a database. This is no problem for mod_rewrite using a prg:/ rewrite map reverse proxy. The question is, the urls returned by rails helpers have the form /controller/action making them absolute to the root. This is a problem for the page served by mod_rewrite because links on the proxied page appear as absolute to the domain. i.e.: http://www.my_host.com/app_one/controller/action has links that end up looking like /controller/action/ when they need to look like /app_one/controller/action mod_proxy_html seems like the right idea, but it doesn't seem to be as dynamic as I would need, since the rules need to be hard coded into the config files. Is there a way to fix this server-side, so that the links will be routed correctly?

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  • reverse_proxy (mod_rewrite) and rails

    - by SooDesuNe
    I have front end rails app, that reverse proxies to any of a number of backend rails apps depending on URL, for example http://www.my_host.com/app_one reverse proxies to http://www.remote_host_running_app_one.com such that a URL like http://www.my_host.com/app_one/users will display the contents of http://www.remote_host_running_app_one.com/users I have a large, and ever expanding number of backends, so they can not be explicitly listed anywhere other than a database. This is no problem for mod_rewrite using a prg:/ rewrite map reverse proxy. The question is, the urls returned by rails helpers have the form /controller/action making them absolute to the root. This is a problem for the page served by mod_rewrite because links on the proxied page appear as absolute to the domain. i.e.: http://www.my_host.com/app_one/controller/action has links that end up looking like /controller/action/ when they need to look like /app_one/controller/action Is there a way to fix this server-side, so that the links will be routed correctly?

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  • Reverse Proxy (mod_rewrite) and Rails (absolute paths)

    - by SooDesuNe
    I have front end rails app, that reverse proxies to any of a number of backend rails apps depending on URL, for example http://www.my_host.com/app_one reverse proxies to http://www.remote_host_running_app_one.com such that a URL like http://www.my_host.com/app_one/users will display the contents of http://www.remote_host_running_app_one.com/users I have a large, and ever expanding number of backends, so they can not be explicitly listed anywhere other than a database. This is no problem for mod_rewrite using a prg:/ rewrite map reverse proxy. The question is, the urls returned by rails helpers have the form /controller/action making them absolute to the root. This is a problem for the page served by mod_rewrite because links on the proxied page appear as absolute to the domain. i.e.: http://www.my_host.com/app_one/controller/action has links that end up looking like /controller/action/ when they need to look like /app_one/controller/action mod_proxy_html seems like the right idea, but it doesn't seem to be as dynamic as I would need, since the rules need to be hard coded into the config files. Is there a way to fix this server-side, so that the links will be routed correctly?

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  • PHP Site Deployment Suggestion

    - by TheOnly92
    I'm currently quite troubled by the way of deployment my team is adopting... It's very old-fashioned and I know it doesn't work very well. But I don't exactly know how to change it, so please give some suggestions about it... Here is our current setup: 2 webservers 1 database server 1 test server Current deployment adaptation 1. We develop and work on the test server, every changes is uploaded manually to the test server. 2. When a change or feature is complete, we then commit the changes to SVN repository. 3. After committing the changes, we then upload our changes to the first webserver, where there will be a cronjob running every minute to sync the files between the servers. Something very annoying is, whenever we upload a file just as the syncing job starts, the file that is sync-ed will appear corrupted, since it is only half-uploaded. Another thing is whenever there is a deployment fault, it will be extremely difficult to revert. These are basically the problem I'm facing, what should I do?

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  • BlackBerry Deployment Strategies

    - by cagreen
    I'm new to large scale BB app deployment and I'm looking for some clarification on the various methods of deployment. Please bear with me as I'm sure there is more to it than my naive view would lead me to believe. My app is very targeted to corporate users and requires a subscription to some additional services before it can be used. In other words, it's not targeted towards the consumer market, so I'm not worried about people not being able to easily find it online. What do I need to be aware of when looking at deployment strategies? Any gotchas? From my understanding my choices are: - App World small upfront vendor fee users can easily search for and find my app billing handled by RIM 4 licensing models (static, single, pool, dynamic). Though I'm not sure I've seen enough info on the pool and dynamic to fully appreciate how it might help me. - Download from my website billing is handled by me can I enforce the number of licenses that are in use within an organization? is this easier/harder for a user? - What else am I missing?

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  • EPM System Standard Deployment Video Series

    - by Paul Anderson -Oracle
    (in via Jan) A four-part video series on deploying Enterprise Performance Management (EPM) System Products has been made available within the Oracle EPMWebcasts YouTube channel. This video series is designed for system administrators. It provides an overview of how to deploy EPM System products using the standard deployment methodology. Deploying EPM System Using Standard Deployment video series: Part 1 - Overview [3:12] Describes the EPM standard deployment and details each of the videos in the series. Part 2 - Preparing for Deployment [3:41] Discusses how to prepare for an EPM standard deployment. Part 3 - Installing and Configuring an Initial Instance of EPM System [4:11] Outlines the steps to install and configure an initial instance of EPM System components.. Part 4 - Scaling Out and Installing EPM System Clients [4:00] Provides an overview of the steps to scale out EPM System components and install EPM System client software. More information is available within the PDF document: EPM System Standard Deployment Guide 11.1.2.3 To view and and access other Oracle EPM Webcast videos visit: Oracle EPM Webcasts YouTube Channel To view and download all of the EPM product documentation visit the Oracle Technology Network (OTN) EPM Documentation Library. In addition to the Oracle EPM Webcasts YouTube channel these videos along with other EPM related product videos and information are available in the Oracle Learning Library (OLL) - visit: Oracle Learning Library - EPM Consolidation and Planning Videos

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  • Creating a multi-tenant application using PostgreSQL's schemas and Rails

    - by ramon.tayag
    Stuff I've already figured out I'm learning how to create a multi-tenant application in Rails that serves data from different schemas based on what domain or subdomain is used to view the application. I already have a few concerns answered: How can you get subdomain-fu to work with domains as well? Here's someone that asked the same question which leads you to this blog. What database, and how will it be structured? Here's an excellent talk by Guy Naor, and good question about PostgreSQL and schemas. I already know my schemas will all have the same structure. They will differ in the data they hold. So, how can you run migrations for all schemas? Here's an answer. Those three points cover a lot of the general stuff I need to know. However, in the next steps I seem to have many ways of implementing things. I'm hoping that there's a better, easier way. Finally, to my question When a new user signs up, I can easily create the schema. However, what would be the best and easiest way to load the structure that the rest of the schemas already have? Here are some questions/scenarios that might give you a better idea. Should I pass it on to a shell script that dumps the public schema into a temporary one, and imports it back to my main database (pretty much like what Guy Naor says in his video)? Here's a quick summary/script I got from the helpful #postgres on freenode. While this will probably work, I'm gonna have to do a lot of stuff outside of Rails, which makes me a bit uncomfortable.. which also brings me to the next question. Is there a way to do this straight from Ruby on Rails? Like create a PostgreSQL schema, then just load the Rails database schema (schema.rb - I know, it's confusing) into that PostgreSQL schema. Is there a gem/plugin that has these things already? Methods like "create_pg_schema_and_load_rails_schema(the_new_schema_name)". If there's none, I'll probably work at making one, but I'm doubtful about how well tested it'll be with all the moving parts (especially if I end up using a shell script to create and manage new PostgreSQL schemas). Thanks, and I hope that wasn't too long! UPDATE May 11, 2010 11:26 GMT+8 Since last night I've been able to get a method to work that creates a new schema and loads schema.rb into it. Not sure if what I'm doing is correct (seems to work fine, so far) but it's a step closer at least. If there's a better way please let me know. module SchemaUtils def self.add_schema_to_path(schema) conn = ActiveRecord::Base.connection conn.execute "SET search_path TO #{schema}, #{conn.schema_search_path}" end def self.reset_search_path conn = ActiveRecord::Base.connection conn.execute "SET search_path TO #{conn.schema_search_path}" end def self.create_and_migrate_schema(schema_name) conn = ActiveRecord::Base.connection schemas = conn.select_values("select * from pg_namespace where nspname != 'information_schema' AND nspname NOT LIKE 'pg%'") if schemas.include?(schema_name) tables = conn.tables Rails.logger.info "#{schema_name} exists already with these tables #{tables.inspect}" else Rails.logger.info "About to create #{schema_name}" conn.execute "create schema #{schema_name}" end # Save the old search path so we can set it back at the end of this method old_search_path = conn.schema_search_path # Tried to set the search path like in the methods above (from Guy Naor) # conn.execute "SET search_path TO #{schema_name}" # But the connection itself seems to remember the old search path. # If set this way, it works. conn.schema_search_path = schema_name # Directly from databases.rake. # In Rails 2.3.5 databases.rake can be found in railties/lib/tasks/databases.rake file = "#{Rails.root}/db/schema.rb" if File.exists?(file) Rails.logger.info "About to load the schema #{file}" load(file) else abort %{#{file} doesn't exist yet. It's possible that you just ran a migration!} end Rails.logger.info "About to set search path back to #{old_search_path}." conn.schema_search_path = old_search_path end end

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  • Exception Errno::EPIPE in Passenger RequestHandler (Broken pipe)

    - by Millisami
    Hi, Upgraded to Rails 2.3.2 and Passenger 2.2.4 on Ubuntu hardy slice at slicehost with Apache2 I'm getting this same above discussed error in my Apache error.log of system /var/logs/apache2/ [ pid=4249 file=ext/apache2/Hooks.cpp:638 time=2009-07-04 11:47:32.752 ]: No data received from the backend application (process 4383) within 45000 msec. Either the backend application is frozen, or your TimeOut value of 45 seconds is too low. Please check whether your application is frozen, or increase the value of the TimeOut configuration directive. *** Exception Errno::EPIPE in Passenger RequestHandler (Broken pipe) (process 4391): from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/rack/request_handler.rb:93:in `write' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/rack/request_handler.rb:93:in `process_request' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_request_handler.rb:206:in `main_loop' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/railz/application_spawner.rb:376:in `start_request_handler' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/railz/application_spawner.rb:334:in `handle_spawn_application' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/utils.rb:182:in `safe_fork' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/railz/application_spawner.rb:332:in `handle_spawn_application' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server.rb:351:in `__send__' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server.rb:351:in `main_loop' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server.rb:195:in `start_synchronously' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server.rb:162:in `start' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/railz/application_spawner.rb:213:in `start' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/spawn_manager.rb:261:in `spawn_rails_application' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/spawn_manager.rb:255:in `spawn_rails_application' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server_collection.rb:80:in `synchronize' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server_collection.rb:79:in `synchronize' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/spawn_manager.rb:254:in `spawn_rails_application' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/spawn_manager.rb:153:in `spawn_application' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/spawn_manager.rb:286:in `handle_spawn_application' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server.rb:351:in `__send__' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server.rb:351:in `main_loop' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/ phusion_passenger/abstract_server.rb:195:in `start_synchronously' from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/bin/passenger-spawn- server:61 *** Exception Errno::EPIPE in Passenger RequestHandler (Broken pipe) (process 4383): and these too. pid=4362 file=ext/apache2/Hooks.cpp:638 time=2009-07-04 11:55:19.251 ]: No data received from the backend application (process 4383) within 45000 msec. Either the backend application is frozen, or your TimeOut value of 45 seconds is too low. Please check whether your application is frozen, or increase the value of the TimeOut configuration directive. [ pid=4298 file=ext/apache2/Hooks.cpp:638 time=2009-07-04 11:55:19.255 ]: No data received from the backend application (process 4252) within 45000 msec. Either the backend application is frozen, or your TimeOut value of 45 seconds is too low. Please check whether your application is frozen, or increase the value of the TimeOut configuration directive. [Sat Jul 04 11:55:19 2009] [error] [client 86.96.226.13] Premature end of script headers: 41, referer: http://domain.com/ [ pid=4373 file=ext/apache2/Hooks.cpp:638 time=2009-07-04 11:55:19.559 ]: Its getting me mad and on the browser, sometimes its show and when refreshed, Application Error 500 shows up in frequent basis. any directions??

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