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50 lines
1.4 KiB
Ruby
50 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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module ActionController
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# Override the default form builder for all views rendered by this
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# controller and any of its descendants. Accepts a subclass of
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# +ActionView::Helpers::FormBuilder+.
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#
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# For example, given a form builder:
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#
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# class AdminFormBuilder < ActionView::Helpers::FormBuilder
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# def special_field(name)
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# end
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# end
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#
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# The controller specifies a form builder as its default:
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#
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# class AdminAreaController < ApplicationController
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# default_form_builder AdminFormBuilder
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# end
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#
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# Then in the view any form using +form_for+ will be an instance of the
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# specified form builder:
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#
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# <%= form_for(@instance) do |builder| %>
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# <%= builder.special_field(:name) %>
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# <% end %>
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module FormBuilder
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extend ActiveSupport::Concern
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included do
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class_attribute :_default_form_builder, instance_accessor: false
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end
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module ClassMethods
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# Set the form builder to be used as the default for all forms
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# in the views rendered by this controller and its subclasses.
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#
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# ==== Parameters
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# * <tt>builder</tt> - Default form builder, an instance of +ActionView::Helpers::FormBuilder+
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def default_form_builder(builder)
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self._default_form_builder = builder
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end
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end
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# Default form builder for the controller
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def default_form_builder
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self.class._default_form_builder
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end
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end
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end
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