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_by_id! 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 = 
"0.2.1".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.



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# File 'lib/action_controller/parents.rb', line 28

class Parents < Module
  private

  def initialize(*resource_classes)
    @finder = Finder.new(resource_classes)
  end

  def included(base)
    finder = @finder
    base.class_eval do
      define_method :parent_resource do
        finder.parent_resource(params)
      end
    end
  end
end