...your jQuery version if desired. Here is an example how this might look: { "dependencies": { "@rails/webpacker": "4.x", "bootstrap-datepicker": "1.8.0", "bootstrap-sass": "3.4.1", "font-awesome": "4.7.x", "jquery": "2.2.4",

...be done by compiling the packs for production and search for a working example: RAILS_ENV=production bundle exec rake assets:precompile. Remember to remove the folder public/packs afterwards...

There is a way to use multiple databases in Rails. You may have asked yourself how you're able to keep your test databases clean, if you're running multiple...

...records to check if the migration works properly with those. after_initialize :readonly!, unless: -> { Rails.env.test? } end When defining multiple adapters in your database.yml, Rails needs to decide which one to...

...cloned project. The reason is your environment.rb which is loaded for Raketasks and calls Rails.application.initialize! which in turn may/will evaluate classes. If one of those classes is tries to access...

...if you don't know which one handled the request you are looking for. Rails application logs usually live in /var/www/ /shared/log. Web server logs usually live in /var/www/ /log...

...multiple servers at the same time With a custom Capistrano task: CMD='zgrep -P "..." RAILS_ROOT/log/production.log' bundle exec cap production app:run_cmd See Capistrano 3: Running a command on...

# ActiveRecord 3.2+ was activated end Detect if a gem has been required Rails will automatically require all the gems in your Gemfile, unless you pass the require: false...

...option. When working on non-Rails project (such as a gem), nothing is required automatically. To detect if a gem has been required, use defined? on one of the modules...

...into a database console, run SET GLOBAL query_cache_type=OFF; and restart your rails server. You can also disable the cache on a per query basis by saying

...SQL_NO_CACHE * FROM ... You also probably want to disable Rails internal (per-request) cache. For this, wrap your code with a call to ActiveRecord::Base.uncached. For example, as an...

...popular authentication libraries like clearance or devise for this task. Learn Read the article Rails Authentication from Scratch You don't need to do write any code, but you should...

...you have access to the database? Can you sign out a user using the Rails console? If someone can read our network traffic, can he see a user's password...

expect(time1).to eq(time2) end Note for users of #end_of_day Rails extends Time with a method #end_of_day which returns the latest possible Time on...

...ids on an ActiveRecord scope to pluck all the ids of the relation: # Modern Rails User.where("users.name LIKE 'Foo Bar'").ids # Rails 3.2+ equivalent User.where("users.name LIKE 'Foo Bar'").pluck...

# Edge rider equivalent for Rails 2+ User.where("users.name LIKE 'Foo Bar'").collect_ids

...command line flag when opening an IRB: irb --nomultiline This also works on modern Rails when using rails console like so: rails console -- --nomultiline Option 2: Disable by default

From Exploring ES6: Module imports are hoisted (internally moved to the beginning of the current scope). Therefore, it doesn’t...

...ein User ungefiltertes HTML in die Webseite einfügen kann. Danke für den interessanten Beitrag! alert('you have been hacked') Rails löst das Problem weitgehend, aber Programmierfehler weiter möglich manchmal Sicherheitslücken in Gems oder Rails

background-color: blue; } = javascript_tag nonce: true do :plain window.addEventListener('load', () => { ... }); CSP mit Rails Demo Konfiguration via config/initializer/content_security_policy.rb Überschreiben in einzelnen Controllern Nonce-Support für javascript_tag

...MySQL or PostgreSQL. Implementation examples are for the ActiveRecord ORM used with Ruby on Rails, but the techniques can be implemented in any language or framework. We will be using...

YOUR QUERY\G; \x on Further reading How to setup Ruby on Rails with PostgreSQL Connect to a Rails database with bin/rails dbconsole -p...

Rails' Strong Parameters enable you to allow only specific values from request params to e.g. avoid mass assignment. Usually, you say something like params.permit(:email, :password) and any extra parameters...

There are multiple ways to redirect URLs to a different URL in Rails, and they differ in small but important nuances. Imagine you want to redirect the following url...

When deploying Rails applications you might have noticed that JS and CSS are not cached by all browsers. In order to force Apache to add expiry dates to its response...

...when I change a file? Changed stylesheets and javascripts will always be reloaded because Rails appends a screen.css?1234567 timestamp to the paths. Background images referred to from the CSS...

...after_logout idp_sign_out] end Unsafe redirect when trying to log out Since Rails 7 you need to pass allow_other_host: true to redirect_to to allow a...

In Ruby on Rails ActiveRecord::Relation#merge overwrites existing conditions on the same column. This may cause the relation to select more records than expected: authorized_users = User.where(id...

end But how to solve the uniqueness problem? Another day, another undocumented Rails feature! This time, it’s that ActiveRecord::Base.connection.add_index supports an undocumented option to pass...

(excerpt from: Fancy Postgres indexes with ActiveRecord) So regarding to the cited site Rails 5+ allows me to use an SQL statement in my index: t.index 'shop_id, lower...

Quick reference for passing data from Rails to JavaScript via Unpoly compilers. Haml Attribute Syntax # Ising hash rockets and string symbols (method calls) = form.text_field :name, 'date-picker': true

...collectiveidea.com/blog/archives/2012/01/27/testing-file-downloads-with-capybara-and-chromedriver module DownloadHelpers TIMEOUT = 10 module_function def download_path download_path = Rails.root.join("tmp/test_downloads#{ENV['TEST_ENV_NUMBER']}") FileUtils.mkdir_p(download_path) download_path end def clear_downloads FileUtils.rm...

If you run a Rails app that is using Turbo, you might observe that your integration tests are unstable depending on the load of your machine. We have a card...

When your JavaScript bundle is so massive that you cannot load it all up front, I would recommend to load...