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...
...can remove conditions, order, etc by using the unscope method. It is available on Rails 4+. Examples Consider an exemplary User class as follows. For the examples below, we will...
...scope of any constraints. users.unscoped ^ SELECT "users".* FROM "users" While unscope was introduced with Rails 4, the unscoped method has been around since Rails...
...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...
...have to run a separate process. # You'll also benefit from code reloading. if Rails.env.development? require 'sidekiq/testing' Sidekiq::Testing.inline!
...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...
...performance due to the cost of reindexing. Minidusen is currently compatible with MySQL, PostgreSQL, Rails 3.2, Rails 4.2 and Rails 5.0. Basic Usage Our example will be a simple address...
...Note that #origin_class it roughly equivalent to the blockless form of #unscoped from Rails 3.2+, but it works consistently across all Rails versions. #unscoped does not exist for Rails...
...and is broken in Rails...
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...
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...
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
Why is it often fine to memoize instance methods? Resources Speeding up Rails with Memoization 4 Simple Memoization Patterns in Ruby (And One Gem)
website_sizer = WebsiteSizer.new website_sizer.size_of('https://makandra.com') # => 27448 website_sizer.size_of('https://railslts.com') # => 2145364 You can use any library to perform the actual HTTP request. The class should...
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:
...Note.all.preload(:attachments).ids.size # => 8 Note I created a bug report for this in the Rails project: https://github.com/rails/rails/issues/46455
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...
top Also see: How to get a rough picture about a Rails project How to examine an unknown Ruby object
...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...
...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...
...all styling inline, which means you'll have to do your styling inline. For Rails applications, you can use Roadie or premailer, which lets you keep your well-structured CSS...
...litmus during rendering. For a preview during develoment, you can also use your local Rails mailer previews. Take the preview HTML source and paste it to Litmus. When the builder...
You may disable multi-line autocomplete by using the --nomultiline commandline switch (for Rails, use bin/rails console -- --nomultiline), or specifying IRB.conf[:USE_MULTILINE] = false in your ~/.irbrc.
...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...
...part is a bit lengthy, but it allows you to debug strange bugs with Rails autoloading the wrong constants. Due to the constant lookup rules above, Rails sometimes guesses wrong...
...in development and production, but the problem exist for both environment. Development During development, Rails unloads all classes after every request. This way code changes take effect immediately, without requiring...
...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...