You can put Rails.application.config.action_cable.allowed_request_origins = [‘http://localhost:3001’] in your development.rb See https://github.com/rails/rails/tree/master/actioncable#allowed-request-origins for more informations
If you are on rails 5 and you are using the default config/environments/development.rb file it will have this line of code in there. config.file_watcher = ActiveSupport::EventedFileUpdateChecker This requires the gem listen. This threw me for a bit as I was doing a rails 4 upgrades to a rails 5 edit: Forgot to mention that if … Read more
HTTP request methods will accept only the following keyword arguments params, headers, env, xhr, format According to the new API, you should use keyword arguments, params in this case: it ‘should show field’ do get :show, params: { id: field.id } expect(response.status).to eq(200) end
The non-deprecated way is to use render :plain Rails Guide on Layouts and Rendering: 2.2.6 Rendering Text You can send plain text – with no markup at all – back to the browser by using the :plain option to render: render plain: “OK” Bonus Instead of render nothing: true (also removed), one should now use … Read more
This is the new migration versioning introduced with Rails 5. The number indicates the migration version the migration was created with, in this case version 5.1 and should be used with Rails versions >= 5.0. This is a class function def self.[](version) of the ActiveRecord::Migration, which calls Compatibility.find(version) and is used for backward compatibility. Here … Read more
My list of changes after moving to Rails 5: Place lib dir into app because all code inside app is autoloaded in dev and eager loaded in prod and most importantly is autoreloaded in development so you don’t have to restart server each time you make changes. Remove any require statements pointing to your own … Read more
You can use helpers.<helper> in Rails 5+ (or ActionController::Base.helpers.<helper>) view_context.<helper> (Rails 4 & 3) (WARNING: this instantiates a new view instance per call) @template.<helper> (Rails 2) include helper in a singleton class and then singleton.helper include the helper in the controller (WARNING: will make all helper methods into controller actions)
Rails core team decided to have consistency by enabling rails command to support everything that rake does. For example in Rails 5 commands like db:migrate, db:setup, db:test etc which are part of rake command in Rails 4 are now being supported by rails command. However you can still choose to use rake to run those … Read more
In application_controller.rb add the following: # You want to get exceptions in development, but not in production. unless Rails.application.config.consider_all_requests_local rescue_from ActionController::RoutingError, with: -> { render_404 } end def render_404 respond_to do |format| format.html { render template: ‘errors/not_found’, status: 404 } format.all { render nothing: true, status: 404 } end end I usually also rescue following … Read more