Class: ActionController::Parents

Inherits:
Module
  • Object
show all
Defined in:
lib/action_controller/parents.rb,
lib/action_controller/parents/finder.rb,
lib/action_controller/parents/methods.rb,
lib/action_controller/parents/version.rb

Overview

To be included in a controller.

Creates a parent_resource method, which will call find using an id found in the params hash.

Examples:

Organization and Group as parents


class MembersController < ActionController::Base
  include ActionController::Parents.new(Organization, Group)

  def index
    @members = parent_resource.members
  end
end

Defined Under Namespace

Modules: Methods Classes: Finder

Constant Summary collapse

NoFindMethodError = 
Class.new(StandardError)
VERSION = 
'0.3.0'.freeze

Instance Method Summary collapse

Instance Method Details

#parent_resource ⇒ ActiveRecord::Base?

Fetches the parent resource.

Returns:

  • (ActiveRecord::Base, nil) —

    The result or nil if no matching key has been found.

Raises:

  • (ActiveRecord::RecordNotFound) —

    When a parent resource key is present, but no parent resource is found for it.



28
29
30
31
32
33
34
35
36
37
 
# File 'lib/action_controller/parents.rb', line 28

class Parents < Module
  private

  def initialize(*resource_classes)
    finder = Finder.new(resource_classes)
    define_method :parent_resource do
      @parent_resource ||= finder.parent_resource(params)
    end
  end
end