module ActionController::FormBuilder
Action Controller Form Builder
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_with or form_for will be an instance of the specified form builder:
<%= form_with(model: @instance) do |builder| %>
<%= builder.special_field(:name) %>
<% end %>
Public instance methods
default_form_builder()
Default form builder for the controller
Source code GitHub
# File actionpack/lib/action_controller/form_builder.rb, line 51
def default_form_builder
self.class._default_form_builder
end