You might have some trouble running a Rails LTS 2 app with MySQL 5.7. If you don't want to hack Mysql 5.6 into your modern Ubuntu or use the...
...try MariaDB 10.x. MariaDB 10.x should work with both old and new Rails applications. Switch to MariaDB Remove MySQL: sudo apt remove mysql-common mysql-client mysql-server...
...the same routes, the controller paths will be different, though. In the first example rails will expect to find a Users::SignUpsController in the subdirectory controllers/users/sign_ups_controller.rb, but there has to...
...first example of this card (resource :report, only: :show, controller: 'projects/report'). Solution for legacy Rails versions What you can do instead is simple re-use the :projects symbol as both...
It sometimes happen that a database dump, that would want to insert into your development database, does not match the...
...has to wait until the thread of one of the workers is free. Threads Rails is thread-safe since version 4 (note that not all gems are thread-safe). This...
...for the related config/puma.rb: workers Integer(ENV['WEB_CONCURRENCY'] || 2) threads_count = Integer(ENV['RAILS_MAX_THREADS'] || 5) Note: Having multiple workers in development and tests might cause unexpected issues...
...prevent this, test for the right environment and place the JS-code afterwards: - if Rails.env.production? :javascript var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-XXXXXXXX-X']); _gaq.push(['_trackPageview...
See our new comprehensive guide for upgrading every Rails 2 version ever...
See our new comprehensive guide to upgrading every Rails 2 version ever...
...development, you might get an ActiveRecord::EnvironmentMismatchError when trying to replace the database (like rails db:drop, rails db:schema:load). $ rails db:drop rails aborted! ActiveRecord::EnvironmentMismatchError: You are...
...sure you want to continue, first set the environment using: bin/rails db:environment:set RAILS_ENV=development Starting with Rails 5, the ar_internal_metadata database table was introduced:
If you get an error like this ... can’t find executable rails for rails-3.2.3 (Gem::Exception) ... one of several things might be wrong. You're using RVM
...possible that you have a system-wide gem executable (like rails) that requires a gem that is not available in the current RVM Ruby or gemset. Check what Ruby you...
Using ActiveRecord's #signed_id and .find_signed methods you can create URLs that expire after some time. No conditionals...
Yesterday, Rails fixed a security issue (CVE-2014-3514) in Rails 4+. It was possible to use .where or .create_with to bypass Rails' Strong Parameters: user.blog_posts.create_with...
...know .create_with existed, have a look at the API. How this applies to Rails 3 In Rails 3, Strong Parameters did not exist, yet. Instead, you used mass assignment...
In Ruby on Rails, all the routes of a given application can be found within the config/routes.rb file. You add more and more routes in this file as your project...
...important to find a way to order and maintain your routes. See: Clean your Rails routes: grouping Sometimes the routes.rb grows very fast and each line adds more confusion to...
Rails uses a CSRF token in forms and AJAX requests to verify a user request. Internally it compares the injected CSRF token of the form data with the CSRF token...
...the CSRF token from the form data. Here is a method that works for Rails 5.2. def decode_csrf_token(csrf_token) decoded_masked_token = Base64.strict_decode64(csrf_token)
Note that this seems to affect only recent Rails 2 versions. You will not encounter this until you are writing to the cookie more than once, but when doing so...
Solution This seems to be a bug in Rails, the CookieStore (for sessions) or Rack::Utils.set_cookie_header -- I did not bother looking closer. My problems went away...
Rails flashes (FlashHash) track a list of used keys, which is not respected when comparing flash hashes. This does not concern you under most circumstances. Basics When ActionController picks up...
...method which checks for that: ActionController::Flash::FlashHash.class_eval do # This is from a Rails 2 project. For Rails 3, say: # ActionDispatch::Flash::FlashHash.class_eval do def same?(other_flash...
You may encounter problems with passenger starting an application with an updated rails. If you find an error like this in the apache error log...
...17680/7f4907ae7700 agents/HelperAgent/RequestHandler.h:2210 ]: [Client 19] Cannot checkout session. Error page: This application is a Rails 3 application, but it was wrongly detected as a Rails 1 or Rails 2 application...
Instead of cobbling together default settings in several different places as the issues arise, you can define them application-wide...
A couple of Railsconfs ago, Courtenay and I did indeed discuss
...an API which you could maybe use! You can connect to the GitLab internal Rails with executing gitlab-rails console. It might be slow at times, especially if you use...
The following code listings are expected to be entered inside the gitlab-rails console. Remove GitLab Labels from already closed Issues p = Project.find_by_id(1)
...token authenticity" even if csrf token is present? As :domain => :all is set in Rails 3, local session cookies seem not to be set unless you specify a top-level...
Solutions Use a dns wildcard service like lvh.me and set :domain => 'lvh.me' if Rails.env.development? Then you can access your local server with lvh.me:3000 or anysubdomain.lvh.me:3000. Another way is, to...
...setting the :x_sendfile option to true. This option is activated by default for Rails 3, so you need to understand this. What this option does is not to send...
...as a new response header: X-Sendfile: /opt/www/awesome-project/shared/downloads/image.png When the response comes back from Rails to Apache for delivery, Apache will detect that header and replace the empty response body...
Plugins (and gems) are typically tested using a complete sample rails application that lives in the spec folder of the plugin. If your gem is supposed to work with multiple...
...versions of Rails, you might want to use to separate apps - one for each rails version. For best practice examples that give you full coverage with minimal repitition of code...
If a model inherits from others or uses many concerns / traits, it might be hard to see in the code...
...exceptions, maybe some bot visits your site requesting silly formats like: http://www.rails-app.com/makandra.html-username-2000 # => Rails tries to retrieve 'makandra' with format 'html-username-2000' Just restrict accepted format parameters for...
...not_acceptable) end end end end Note: request.format more reliably tells the format, but includes Rails-required formats such as application/x-www-form-urlencoded (which we must not refuse). For our purposes, getting...