...building it yourself Also see the chapter "Owning your Stack" in the book Growing Rails Applications in Practice. Services Open-Source Maturity & Maintenance Certification Rubygems
...can specify your preferred version like so: bundle _2.1.2_ update --bundler Older Ruby and Rails cannot use the latest bundler 2 version, so you need to stay on bundler...
...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...
...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...
...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...
...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
...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...
...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
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...
RSpec Rails can automatically mix in different behaviors to your tests based on their type tag, for example enabling you to call get and post in specs with the tag...
From Exploring ES6: Module imports are hoisted (internally moved to the beginning of the current scope). Therefore, it doesn’t...
...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...
...If you trigger a COUNT query for an association of an an unsaved record, Rails will try to load all children where the foreign key IS NULL. This is not...
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...
...consume GBs of memory bringing down our servers. The solution Just use .preload instead. Rails will use separate queries to preload the data. This cannot lead to a cross product...
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...
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...
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...
...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...
When your JavaScript bundle is so massive that you cannot load it all up front, I would recommend to load...
...when your application uses time zones. Background A time-zoned Time attribute on a Rails record is converted to UTC using to_s(:db) to be stored, and converted back...