Sending raw JSON data to a member action in a controller spec

In moderately complex authorization scenarios you will often find yourself writing a map like this:

class NotesController < ApplicationController
  power :notes, :map => {
    [:edit, :update] => :updatable_notes
    [:new, :creat...

There are many approaches out there how you can import data from a legacy application to a new application. Here is an approach which opens two database connections and uses active record for the legacy system, too:

1. Add you database informati...

The ActionDispatch module of Rails gives you the helper method flash to access the flash messages in a response.

describe PostsController, type: :request do

  descr...

The method cookies is defined in the ActionController and should never be overwritten.

Bad example

class StaticPagesController < ApplicationController

  def imprint
  end

  def cookies
    redirect_to '/'
  end

end

If you cr...

At makandra, we've built a few gems over the years. Some of these are quite popular: spreewald (> 1M downloads), active_type (> 1M downloads), and geordi (> 200k downloads)

Developing a Ruby gem is different from developing Rails applications, w...

It most cases it's not necessary to add a version constraint next to your packages in the package.json. Since all versions are saved in a lockfile, everyone running yarn install will get exactly the same versions. Yarn saves this lockfile as `...

Remember that your controller actions share the same method space with private methods defined in ActionController::Base. If your controller behaves in super-weird ways, check that you don't overwrite some internal method with a controller action.

The parallel-gem is quite easy to use and can speed up rendering time if you want to render the same partial multiple times (e.g. for rendering long lists of things).
If your parallelized code talks to the da...

Rails 3+

view_context.helper_method('args')

Rails 2

ApplicationController.helpers.helper_method('args')

Also see [How to use helper methods inside a model](https://makandracards.com/makandra/1307-how-to-use-hel...

Code snippet tested with Rails 2.3

  def index
    # ...
    if request.xhr?
      html = render_to_string(:partial => "list", :layout => false)
      respond_to do |format|
        format.html { render :text => html }
        format.json {...