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  • Le kit du bon développeur Rails, partie 3. Par l'équipe de Synbioz

    Dernière partie de notre série d'articles sur les gems à connaitre par un développeur Rails. Dans le premier article, nous nous étions attardés sur l'authentification, la recherche et la pagination. Dans la deuxième partie, ce fut au tour de l'internationalisation et de la gestion de fichiers. Dans ce dernier article, les gems concernant les tests et la gestion des tâches annexes seront à leur tour abordées.

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  • Lazy Load images on Listview in android(Beginner Level)?

    - by Praveen Chandrasekaran
    Hi all, I am working on the listview with the custom adapter. I want to load the images and text view on it. The images are load from the internet urls. I just want to show the images which are visible list item to hte user. I refered the Shelves opensource project example from romainguy, but its to complicated to understand the code. For a beginner level, I just want to know how to handle the tag between the adapter and activity. From the commonsware example I can set the tag on adapter, but can't show the corresponding image at the idle state of the listview. Please help me with your ideas. Sample codes are more understandable. Thanks. EDIT: The combination of Efficient and Slow Adapter in ApiDemos is more helpful to understand.

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  • Is Python a beginner language or is it robust?

    - by orokusaki
    I am already working on some software in Python but I'm having one of those days where I step back and reflect just to make sure I'm not spinning my wheels. I know that Twitter launched with RoR because it was fast to build. Then they almost moved into another language in 2008 because of scalability issues. This has caused me to step back and introspect for a moment to make sure I'm heading down the right path. I've read in some tutorials and other places that Python is "a great first language" or a "nice beginner language" as though it's not capable of larger tasks. I look at it as Python can do what Java or ASP can but with about 1/4th of the code, not to mention I don't have to build or compile, etc. I've read that Java runs quite a few times faster than Python which is important of course, but then I read everywhere that hardware keeps getting cheaper and there are projects like Unladen Swallow by Google to make Python faster. Should I be concerned or is this just the remnants of Java developers?

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  • any security tips for my first server? (complete beginner)

    - by Haroldo
    I'm paying for a VPS and hoping to launch my first website on it in the next few days. I'm worried there might be some glaringly obvious security holes in the standard setup, so I'm keen to get some tips About the only thing i know is turn off error reporting in PHP and create users/privilages for MySQL... any more stuff along those lines? I'm using: cpanel and WHM centos 5 php mysql google apps as mail server (so maybe i should disable built in mailer server somehow?!!) This is my first post of Server Fault (i use stack overflow alot), I hope i'm posting this in the right place, with the right tags - please feel free to edit if i'm wrong. Thanks guys!

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  • MongoMapper won't let me create an object

    - by Jade
    I'm just learning MongoDB and MongoMapper. This is on Rails 3. I created a blog in app/models/blog.rb: class Blog include MongoMapper::Document key :title, String, :required => true key :body, Text timestamps! end I go into the Rails console: rails c Loading development environment (Rails 3.0.0.beta) ruby-1.9.1-p378 > **b = Blog.new** NoMethodError: undefined method `from_mongo' for Text:Module from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/keys.rb:323:in `get' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/keys.rb:269:in `read_key' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/keys.rb:224:in `[]' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/inspect.rb:7:in `block in inspect' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/inspect.rb:6:in `collect' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/mongo_mapper-0.7.2/lib/mongo_mapper/plugins/inspect.rb:6:in `inspect' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/commands/console.rb:47:in `start' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/commands/console.rb:8:in `start' from /Users/jade/.rvm/gems/ruby-1.9.1-p378/gems/railties-3.0.0.beta/lib/rails/commands.rb:34:in `<top (required)>' from /Users/jade/code/farmerjade/script/rails:10:in `require' from /Users/jade/code/farmerjade/script/rails:10:in `<main>' Am I overlooking something really dumb, or is this something in my setup? I'm using the mongo_mapper version you get by adding it to your Gemfile, so I'm wondering if it might be that. I'd appreciate any suggestions!

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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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  • Error running heroku console. can't update heroku

    - by Omnipresent
    When I try to run heroku console I get the following error: user@omnipresent:~/rails/demo$ heroku console ! This version of the heroku gem has been deprecated. ! Please update it by running: gem update heroku When I do the update..it says there is nothing to update! user@omnipresent:~/rails/demo$ gem update heroku Updating installed gems Nothing to update Following are my versions: user@omnipresent:~/rails/demo$ heroku version heroku-gem/1.5.2 user@omnipresent:~/rails/demo$ ruby -v ruby 1.9.1p0 (2009-01-30 revision 21907) [i686-linux] user@omnipresent:~/rails/demo$ rails -v Rails 2.3.5

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  • I have the CSS & JS, how do I convert that to erb for my Rails app?

    - by marcamillion
    So I have the foundation of my Rails app, then I went ahead and did the JS and CSS. How do I then take the CSS and JS that I have, and apply it to the app in a 'Rails Way'. i.e. a dynamic way that works nicely. Can you give me some tutorials/articles/resources that I can read up to guide me, please? I have tried the Rails guides, but I find them a bit lacking. Any other good suggestions or tips that might help get me on the right track? Thanks.

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  • Getting rails to execute root level file edits on system files without compromising security.

    - by voxobscuro
    I'm writing a Rails 3 application that needs to be able to trigger modifications to unix system config files. I'd like to insulate the file modifications from the consumer side by running them in a background process. I've considered writing out a temp file in rails and then copying the file with a bash script but that doesn't really insulate the system. I've also considered pulling from the database manually with a cron based script and updating the configs. But what I would really like is a component that can hook into the rails environment, read out what is needed from the database, and update the config files. This process needs to be run as root because the config files mostly live in /etc/whatever. Any suggestions? Thanks!

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  • How much memory should my rails stack be consuming?

    - by Hamish
    I am running my own webserver on a 384MB VPS from Slicehost to serve two Ruby on Rails applications on separate Virtual Hosts. I am running Phusion Passenger with Apache2. The following is the contents of my Passenger.conf <IfModule passenger_module> PassengerRoot /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/gems/1.8/gems/passenger-2.2.11 PassengerLogLevel 0 PassengerRuby /usr/local/bin/ruby PassengerUserSwitching on PassengerDefaultUser nobody PassengerMaxPoolSize 3 PassengerMaxInstancesPerApp 2 PassengerPoolIdleTime 300 # Ruby on Rails Options RailsAutoDetect on RailsSpawnMethod smart NameVirtualHost *:80 If i do a 'top' on my server I have 314MB used on average, this seems like too much? Am I mistaken and if not what possible steps can I take to reduce the Memory usage? Thanks!

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  • Nested Model binding in ASP.NET MVC2. fields_for from rails equivalent

    - by dagda1
    Hi, I am looking for some examples of how to do model binding in ASP.NET MVC2 for COMPLEX objects. All the exmples I can find are of simple objects with no child collections or child objects. If I have an Expense object with a child ExpensePayment object. In rails, child objects are rendered with the HTML name attributes like this: expense[expense_payment][net] Rails uses fields_for to render child objects. How can I accomplish something similar in ASP.NET MVC2? Cheers Paul

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  • rails server fails to start with mysql2 using rvm & ruby 1.9.2-p0 on OSX 10.6.5

    - by Scott
    I'm getting the following error when I start rails server: $ rails server /Users/ssmith/.rvm/gems/ruby-1.9.2-p0/gems/mysql2-0.2.6/lib/mysql2.rb:7:in `require': dlopen(/Users/ssmith/.rvm/gems/ruby-1.9.2-p0/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.16.dylib (LoadError) Referenced from: /Users/ssmith/.rvm/gems/ruby-1.9.2-p0/gems/mysql2- 0.2.6/lib/mysql2/mysql2.bundle Reason: image not found - /Users/ssmith/.rvm/gems/ruby-1.9.2-p0/gems/mysql2- 0.2.6/lib/mysql2/mysql2.bundle I've installed mysql2 with the following command after the rvm use ruby-1.9.2-p0 command: $ gem install mysql2 -- --with-mysql-dir=/usr/local/mysql --with-mysql-config=/usr/local/mysql/bin/mysql_config Building native extensions. This could take a while... Successfully installed mysql2-0.2.6 1 gem installed Installing ri documentation for mysql2-0.2.6... Enclosing class/module 'mMysql2' for class Client not known Installing RDoc documentation for mysql2-0.2.6... Enclosing class/module 'mMysql2' for class Client not known I have mysql2 in my Gemfile as well as in the database.yml file and bundle install completes fine $ bundle show mysql2 /Users/ssmith/.rvm/gems/ruby-1.9.2-p0/gems/mysql2-0.2.6 I understand the rails server error is due to it not knowing the mysql_config location on OSX, however on gem install I specified the correct location. Yet RVM's gem is not respecting that mysql_config location it seems. Anyone have a solution to this? Thanks in advance. Scott

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  • apache2 server running ruby on rails application has go daddy cert that works in chrome/firefox and ie 9 but not ie 8

    - by ryan
    I have a rails application up on a linode ubuntu 11 server, running apache2. I have a cert purchased from godaddy, (where we also bought our domain) and the cert is installed on my server. Part of my virtual host file: ServerName my_site.com ServerAlias www.my_site.com SSLEngine On SSLCertificateFile /path/my_site.com.crt SSLCertificateKeyFile /path/my_site.com.key SSLCertificateChainFile /path/gd_bundle.crt The cert works fine in Chrome, FireFox and IE 9+ but in IE 8- I get this error: There is a problem with this website's security certificate. The security certificate presented by this website was issued for a different website's address. I'm hosting multiple rails apps on this same server (4 right now plus some old php sites that don't need ssl). I have tried googling every possible combination of the error/situation that I could think of but at this point I'm shooting in the dark. The closest I could come up with is that some versions if IE don't support SNI. But that doesn't apply here because I am getting the warning on windows 7 machines running IE 8, and the SNI only seemed to apply to IE 8 if the operating system was windows XP. So why is this cert being accepted by all browsers but giving me a warning in IE 8? Edit: So doing a little more digging and I figured out some more. It turns out this is effecting IE 9 as well. However the problem seems to be that IE is not traversing the ssl chain to get to the right cert. FireFox and Chrome when I go to view certificate show the correct one, but IE is showing one of our other sites certificates. REAL QUESTION HERE: That being the case why is IE not getting the right certificate when others are and how do I fix it?

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  • Beginner WPF/XML question: How to get an <element> in an <element>?

    - by Niels
    I have a rather simple question. I'm trying to get information out of an XML file, and now I need to get the that's inside another This is my XML code: <author> <name>Random_name1 (Random Name)</name> <uri>http://thisisanrandomurl.com</uri> </author> I can get the info with this code: Name = item.Element(ns + "author").Value, But this gives me: "Random_name1 (Random Name) http://thisisanrandomurl.com" I only want the info inside the tags. Any ideas? Thanks a lot, - Niels

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  • Problem with Python 3.1(syntax error). Im a beginner please help!

    - by Jonathan
    Hi there, im new to pragraming :) I got a problem with sytax error while making a guessing game. the problem is in (if Gender = boy or Boy), the equal(=) letter is a syntax error. Please help! Answer = 23 Guess = () Gender = input("Are you a boy, a girl or an alien? ") if Gender = boy or Boy: print("Nice!", Gender) if Gender = girl or Girl: print("Prepare do die!", Gender) if Gender = alien or Alien: print("AWESOME my", Gender, "Friend!") While Guess != Answer: if Guess < Answer: print("Too low! try again") else: print("too high!" print("Congratulations you guessed correct!", Gender, "Have fun!" Thank

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  • Issues loading Jquery (Galleria) script from inside an i-frame (beginner javascript?)

    - by 103188530284789248582
    Hello, first of all - I'm not entirely new to javascript, but am not fluent in it as I am with html and css, and am especially new to jQuery... so please excuse me if this questions seems easy or obvious, but after days of google I still have no solution to the problem... using jQuery 1.4.2.min, jQuery-ui-1.8.1 .... the site in question: http://homecapture.ca/sets/project_index.html The scenario: I have a tabbed menu generated from an unordered list, when a menu item is clicked it reveals an iframe which links to the page containing an image gallery. I am using jQuery UI tabs for the tabbed menu, and the galleries to which I'm linking are jQuery Galleria pages, automatically generated with Jalbum. The problem: The galleria plug-in only works normally from inside of the containing iframe in Chrome, has inconsistent behaviour in IE8 (seems to work in my local copy, but won't load properly online), and is not loaded properly in Firefox. Instead of displaying a thumbnail area and the first large image, the Galleria page shows the first thumbnail only, then when it is clicked the image it links to, but if you right-click and go Back, the iframe content shows up as a properly rendered Galleria page. Jalbum generates more script in the < head of the page in addition to linking to jquery and the galleria plug-in. All of it seems to be in charge of the gallery navigation , and I have relocated it to the < body of the page, in an effort to make it load after the parent page scripts, and together with the gallery content. At this point I am not sure what else I could do to solve the problem, without digging around in all or some of the library and pluging .js files (which I am not knowledgeable enough to do without some pointers). Has anyone dealt with a similar issue? I'm seeing some solutions for manipulating iframe content from a parent page with jQuery on here, is that what I should be researching instead? Thanks in advance for all the help! ps. I tried posting some code, but it seems I do not have enough 'reputation' for things to work right on here either :)

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  • So many technologies to choose from. Where does the beginner start?

    - by Sahat
    WPF Silverlight Windows phone 7 w/ Silverlight iPhone OS w/ Objective-C Cocoa w/ Objective-C ASP.NET Android Facebook FBML HTML5 I will be graduating with B.S. in Computer Science soon and have to decide what do I want to learn from this list. I believe it's better to focus on one thing, master it and build up a portfolio to enhance my resume. Bachelor's Degree with no experience, no portfolio won't do me any good. It won't get me a job by itself. I need to have something that will greatly boost my resume. What would it be? iPhone development? ASP.NET web development? Facebook development? Or completely something else that I haven't listed? I understand it's natural for silverlight developers to say "Learn Silverlight", and iPhone developers say "Learn iPhone SDK and Objective-C". So please try to give a constructive, non-biased, non-objective opinion on which technology should I focus on. Please don't close the topic for "subjective/argumentative" reasons. I am just looking for some guidance.

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  • Where can an absolute beginner of Kohana PHP go to learn how to use it from the ground up?

    - by Sergio Tapia
    Hi guys! I have a month of free time and I've decided to launch my own website. It's going to be big and have dymanic content where different users with different roles can perform modifications to the site. Place comments, rate stores, list items, etc. This sound like a perfect opportunity for me to expand my horizons and learn a PHP Framework. I've used PHP bare bones before but nothing too complex. As of now, do you think Kohana is a mature framework to use? I've used Zend in the past for a course in Uni but it sucked horribly, I was new to the MVC model, but Zend had pretty much zero workable tutorials and guides for newbies. That's why I hated it. Where can I go to learn how to use Kohana from a retarded starting point? Thank you very much for your time.

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  • Beginner problem / error with ansi-c and gcc under ubuntu.

    - by Framester
    Hi, I am just starting programming ansi c with gcc under ubuntu (9.04). I get following error messages: error messages: main.c:6: error: expected identifier or ‘(’ before ‘/’ token In file included from /usr/include/stdio.h:75, from main.c:9: /usr/include/libio.h:332: error: expected specifier-qualifier-list before ‘size_t’ /usr/include/libio.h:364: error: expected declaration specifiers or ‘...’ before ‘size_t’ /usr/include/libio.h:373: error: expected declaration specifiers or ‘...’ before ‘size_t’ /usr/include/libio.h:493: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘_IO_sgetn’ In file included from main.c:9: /usr/include/stdio.h:314: error: expected declaration specifiers or ‘...’ before ‘size_t’ /usr/include/stdio.h:682: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fread’ /usr/include/stdio.h:688: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘fwrite’ main.c:12: error: expected identifier or ‘(’ before ‘/’ token I assume it is a very simple problem, maybe in the configuration of ubuntu or gcc. I am new to programming under linux as well. I googled for help and went through a tutorial but could not find an answer. Thank you! code: #include <stdio.h> #include <math.h> int main() { printf("TestOutput\n"); return (0); } command: ~/Documents/projects/Trials$ gcc -Wall -ansi main.c

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  • Jquery Basic Beginner Question: How do i make my function reusable?

    - by obikodi
    I have spent the last few hours attempting to do this on my own, and using Google to find a solution but to no avail. So if you can help out i would super appreciate it! Basically I have a page which has 3 separate biographies in 'preview mode', which shows only the first paragraph of each bio. When you click on 'read more' for one bio it opens up the 'full mode'. What is happening at the moment, is if i click on one 'read more' link, it opens up the full mode on all 3 bio's. How do i edit the following code so; It only opens the full mode bio of the link i click on Make it reusable so i don't have to duplicate the code 3 times for each bio $("a#btnReadMore").click(function(){ $('.readMoreSlider').slideToggle("fast"); $(this).toggleClass("readMoreSliderActive"); return false; }); Thanks for your help!

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