Module: ActionController::FormBuilder

Relationships & Source Files
Namespace Children
Modules: `ClassMethods`
Extension / Inclusion / Inheritance Descendants
Included In: `Base`, `::ActionView::TestCase::TestController`, Rails::ApplicationController, Rails::InfoController, Rails::MailersController, Rails::WelcomeController
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, `::ActiveSupport::Concern`
Defined in:	actionpack/lib/action_controller/form_builder.rb

Overview

Override the default form builder for all views rendered by this controller and any of its descendants. Accepts a subclass of ::ActionView::Helpers::FormBuilder.

For example, given a form builder:

class AdminFormBuilder < ActionView::Helpers::FormBuilder
  def special_field(name)
  end
end

The controller specifies a form builder as its default:

class AdminAreaController < ApplicationController
  default_form_builder AdminFormBuilder
end

Then in the view any form using form_for will be an instance of the specified form builder:

<%= form_for(@instance) do |builder| %>
  <%= builder.special_field(:name) %>
<% end %>

Class Method Summary

`::ActiveSupport::Concern` - Extended

append_features, class_methods, included

Instance Method Summary

#default_form_builder

Default form builder for the controller.

DSL Calls

included

[ GitHub ]



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# File 'actionpack/lib/action_controller/form_builder.rb', line 30


included do
  class_attribute :_default_form_builder, instance_accessor: false
end

Instance Method Details

#default_form_builder

Default form builder for the controller