Submit buttons in Rails come with a useful option :disable_with which will disable the button when clicked and change its label to something like "Please wait...". An annoying side...
...is to re-enable the submit button before leaving the page. This works in Rails 3: $(window).unload(function() { $.rails.enableFormElements($($.rails.formSubmitSelector...
t.column_name, :string t.remove :first_name t.remove :last_name t.rename :cool, :awesome end Rails 2 caveats Rails 2 does not understand the extra options hash but seems to build...
...only created when you rename columns. For other operations such as add and remove Rails 2 will still give you single ALTER statements. More See RobinWu's APIdock comment for...
task :script, roles: :app, only: { primary: true } do run "cd #{current_path} && RAILS_ENV=#{rails_env} bundle exec rails runner 'ScriptRunner.go'" end becomes desc 'Run script'
on primary :app do within current_path do with rails_env: fetch(:rails_env, 'production') do execute :bundle, 'exec', "rails runner 'ScriptRunner.go'" end end end end
encoding: utf8 username: root password: secret Note if you're on an old Rails version If you're using a Rails version less than 3.1 (e.g. 2.3.x...
...Newer versions no longer include the ActiveRecord adapter (which is part of ActiveRecord since Rails .1). So your Gemfile should say:
The ActionDispatch module of Rails gives you the helper method flash to access the flash messages in a response. describe PostsController, type: :request do describe 'update' do it 'shows a...
...helps to modify the Accept-Language in tests. Here is an example for a Rails application with Cucumber integration tests: class ApplicationController OVERRIDE_HTTP_ACCEPT_LANGUAGE = nil def accept_language...
...tokens or CSP nonces. We have deprecated Rack::SteadyETag. We instead recommend reconfiguring your Rails app so two requests to the same resource produce the same HTML for a given...
You have to specify the environment with -e env_name or RAILS_ENV=env_name if you want to run a script on the server. at Rails 2 it's...
bundle exec script/runner -e env_name path/to/script.rb argument1 argument2 ... at Rails 3 it's rails runner RAILS_ENV=env_name bundle exec rails runner path/to/script.rb argument1 argument2...
User.active.to_sql Rails 2 Use either the Edge Rider or fake_arel gem to get #to_sql backported to Rails 2. If you don't want to use...
...a gem for this, you can do this with vanilla Rails 2: User.active.construct_finder_sql...
...block where you define replacements (as you already know). This issue applies to both Rails 2 (with rails_xss) as well as Rails 3 applications. Here is a fix to...
...html_safe.gsub(/(f)/) { puts $1; 'b' } f => "boo" Why? This is because of the way rails_xss implements "unsafe" methods: # vendor/plugins/rails_xss/lib/rails_xss/string_ext.rb UNSAFE_STRING_METHODS = [ ..., "gsub",...
for unsafe_method in UNSAFE...
Rails includes milliseconds in Time / DateTime objects when rendering them as JSON: JSON.parse(User.last.to_json)['created_at'] #=> "2001-01-01T00:00:00.000+00:00" In RSpec you might want...
...have to run a separate process. # You'll also benefit from code reloading. if Rails.env.development? require 'sidekiq/testing' Sidekiq::Testing.inline!
...Commit using a story title from Pivotal Tracker geordi con[sole] [TARGET] # Open a Rails console locally or on a Capistrano deploy target geordi cu[cumber] [FILES] # Run Cucumber features...
...PATH # Optimize .png files geordi ra[ke] TASK # Run a rake task in several Rails environments geordi re[move-executable-flags] # Remove executable-flags from files that should not be...
...byebug 11.1.3 (the most recent version at time of writing) when using it with Rails 6 and it's new autoloading component, zeitwerk. There already is a issue for that...
...OVER() AS full_count FROM (/* some complicated subquery */) posts LIMIT 20 OFFSET 100; In Rails with will_paginate you might use it like this: posts = scope_complicated_scope.select('posts.*, COUNT(*) OVER() AS...
...only of a single javascript file, so it does not trigger additional requests with rails it automagically provides user feedback by selecting the text it has copied it provides callbacks...
...modes like copying from a text field or from a data attribute How to (rails) Add clipboard.js to your project through bower or by downloading and adding the javascript file...
...class DynamicStylesheetsController < ApplicationController def show logical_path = RELATIVE_PATH_TO_YOUR_TEMPLATE path = File.join(Rails.root, logical_path) template = Sass::Rails::SassTemplate.new(path) environment = YourApp::Application.assets context = environment.context_class.new(environment, logical_path...
...these helper methods to your ApplicationController: class ApplicationController < ActionController::Base private def integration_test? Rails.env.test? && defined?(Cucumber::Rails) end def observable_redirect_to(url) if integration_test? render :text => "If...
The Rails asset pipeline improves delivery of application assets (javascripts, stylesheets, images, fonts). Here are some basic facts about its inner workings. No magic Manifests are the handle on your...
...results. You can do this locally using the following commands: rake assets:precompile # precompiles to Rails.root/public/assets rake assets:clobber # deletes the public/assets directory After precompilation, you can check the...
If your rails application is unable to send mails, it might be useful to debug your settings using the rails console. Here is a snippet that shows the current settings...
...entirely find out why, and we eventually did not care). This happened on a Rails 3.2 application and is likely to happen on Rails 4 applications as well. Your best...
If Rails or Rake are complaining about a missing gem that is listed in your Gemfile.lock and the listed version is properly installed, something is seriously wrong and needs to...
...seeing the gems it needs. Remove those wrong and unneccesary directories and Rake and Rails will boot again. To avoid this in the future, make sure everybody installs gems on...
...migration_user.phone ) end end end Now the best idea is to test this in the rails sandbox (so your development data stay untouched): rails console --sandbox 2.4.1 :003 > DataMigration.new.run
...more unreadable to more attributes you delegate. Alternative to def_delegators When working with Rails, use delegate...
...:to =>...
class Post < ActiveRecord::Base belongs_to :topic delegate :title, :category, :to...
end Looks a lot like the above def_delegators call but behaves differently. Rails does not provide a pretty solution to this, but simply write a method for it...