When you need to use diff in either some Ruby code or your Rails app, use the differ gem. puts Differ.diff "foo", "boo" # => {"boo" >> "foo"} Usage There are several variants...
Remember how Rails 2 came with an awesome feature that broke all code using Time.now or Time.parse? This behavior is now the default for Rails 3. Disable it by adding...
Using Scenic, you can bring the power of SQL views to your Rails application without having to switch your schema format to SQL. Scenic provides a convention for versioning views...
...these styles, and system will fail when passing it invalid arguments: system 'bundle exec rails server', '-p 3000' # fails and returns nil This is equivalent to running a command called...
...bundle exec rails" (including spaces in its filename). There is usually no such command anywhere on the $PATH. Note that you should prefer the 2nd approach (list of arguments instead...
...opensource.zalando.com/restful-api-guidelines https://www.merixstudio.com/blog/best-practices-rest-api-development/ https://www.oreilly.com/library/view/rest-api-design/9781449317904/ More topics in our deck: Rails: Rest API post-mortem analysis InfoQ: How to Design a Good API & Why it Matters
When your Rails controller action responds with only a simple text, render text: 'Hello' may not be what you want. You should not even use it on Rails 4.1+ any...
By default, a "text" response from a Rails controller will still be a sent as text/html: render text: 'Hello' response.body # => "Hello" response.content_type # => "text/html" While this may not be...
Katapult was an endeavor to dramatically speed up starting a new Rails application. However, it turned out to save less time than expected, while requiring more time for maintenance than...
...code antiquated. Nevertheless, its architecture may remain an inspiration on how to use the Rails generators programmatically...
Obviously, this leads to problems when comparing strings: "Über".downcase == "über" => false In Rails you can use ActiveSupports' multibyte chars to avoid that problem. It gives you a wrapped...
view_context.helper_method('args') Rails 2 ApplicationController.helpers.helper_method('args') Also see How to use helper methods inside a model...
...iconfont-plugin-webpack that automate the font building. If you're still using the Rails asset pipeline, try the half-automatic approach. Webpacker Rails: How to integrate the plugin
[mysqld] sql_mode="" Now restart MySQL: sudo service mysql restart For a single Rails project If you only want to change the SQL mode for one project, you can...
...last_synchronized_at: nil, } } ) def validate_analytic_stats_against_json_schema @schema ||= File.read(File.join(Rails.root, 'app', 'models', 'project', "analytic_stats_schema_v#{analytics_stats_version}.json")) analytic_stats_errors = JSON...
...You can "fix" this in multiple ways: Update your drivers on your machine with RAILS_ENV=test rake webdrivers:chromedriver:update Ignore the driver update-URL in your VCR configuration...
...and see if VCR complains: WD_CACHE_TIME=1 bundle exec cucumber Note: Newer Rails versions come with the webdrivers gem automatically...
With Rails 4, Concerns have become the “official” solution to the big-models problem. However, there’s a fair amount of controversy about this topic in the community. Not everyone...
...problem of AR models becoming too big. In this talk we will see what Rails Concerns are and how can we use them to keep our models fit. More interestingly...
...49/65) travis-lint... Slow requires: 110.21 render_anywhere 147.33 nokogiri 173.83 haml 179.62 sass-rails 205.04 delayed_job_active_record 286.76 rails 289.36 mail 291.98 capistrano 326.05 delayed_job...
...for your application's bit of metaprogramming. It may matter for a framework like Rails, and for methods that are called really often, but that is not your everyday code...
Now supports RSpec 3 and Rails 4 Drops support for state_machine, which has some issues with Rails 4 and isn't actively maintained
...cassette for the request that fails Copy the request with all parameters Open a rails console, assign the request to a variable and unescape it: my_project> var = "%5B%7B...
...LIKE only takes a fraction of a second. This means when optimizing a typical Rails action, you should probably look further than the database. A view can easily take many...
...often times the results of such subtractions go into a view. When upgrading a Rails application from Ruby 1.8 to 1.9, this will cause significant pain, and under most circumstances...
...a model Signature with name: string, signature: text, you can use it with regular rails form like this: - form_for @signature, :html => { :class => 'signature_form' } do |form| %dl %dt = form.label...
...cache_or_resolve :var, :some_expensive_calculation end This is what "memoize" in earlier rails versions did. There is a gem that reintroduces this behavior, but this is the essential...
In Ruby on Rails, all objects have a useful blank? method. It returns true for nil but also for empty strings or empty arrays. There is also a universal method...
...When dealing with geo data, you'd often use acts_as_geocodable for your Rails applications. There you can just use your model's upgraded find to achieve the same...