justaddwater.dk

I made this addition today after (once again) struggling with option groups for a nested Rails model.

My solution: create a new tag for FormOptionsHelper: grouped_select

http://gist.github.com/179075

	### lib/form_options_helper.rb
	require 'action_view/helpers/form_helper'
	module ActionView
	module Helpers
	module FormOptionsHelper
	##
	def grouped_select(object, method, choices, options = {}, html_options = {})
	InstanceTag.new(object, method, self, options.delete(:object)).to_grouped_select_tag(choices, options, html_options)
	end
	end
	class InstanceTag
	include FormOptionsHelper
	def to_grouped_select_tag(choices, options, html_options)
	html_options = html_options.stringify_keys
	add_default_name_and_id(html_options)
	value = value(object)
	selected_value = options.has_key?(:selected) ? options[:selected] : value
	disabled_value = options.has_key?(:disabled) ? options[:disabled] : nil
	content_tag("select", add_options(grouped_options_for_select(choices, :selected => selected_value, :disabled => disabled_value), options, selected_value), html_options)
	end
	end
	class FormBuilder
	def grouped_select(method, choices, options = {}, html_options = {})
	@template.grouped_select(@object_name, method, choices, objectify_options(options), @default_options.merge(html_options))
	end
	end
	end
	end
	### config/environment.rb
	require 'form_options_helper'
	### app/models/expense_type.rb
	class ExpenseType < ActiveRecord::Base
	validates_uniqueness_of :name
	#returns grouped options split in 'popular' and 'all'
	def self.groups
	all_types = self.all.map{|t| [t.name, t.id]}
	[
	['popular', all_types[0..2]],
	['all', all_types]
	]
	end
	end
	### app/views/expense_report/_expense_item.rb
	<li class="expense_item">
	<%= expense.grouped_select :expense_type_id, ExpenseType.groups, {:include_blank => true}, {:class => 'expense_type'} %>
	...
	</li>

view raw form_options_helper_to_add_grouped_select.rb hosted with by GitHub

This entry was posted by Jesper Rønn-Jensen on Tuesday, September 1st, 2009 at 14:50 (GMT-1) and is filed under Code, Ruby on Rails. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.