Module: ActionController::Macros::ManyToMany::ClassMethods

Defined in:
lib/smklib/htmlutils.rb

Overview

Example:

# Controller
class BusinessesController < ApplicationController
  many_to_many_for :business, :subcategories, :label => _('Subcategory'), :m2m_field_options => {:item_name => 'name_with_category'}
end

# View
xml.div(:id => 'm2m_business_subcategories') do
  many_to_many_field(xml, 'business', 'subcategories', _('Subcategory'), @subcategories, :item_name => 'name_with_category')
end

Instance Method Summary collapse

Instance Method Details

#many_to_many_for(object, attribute, options = {}) ⇒ Object 



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# File 'lib/smklib/htmlutils.rb', line 565

def many_to_many_for(object, attribute, options = {})
	#include SMKLib::HtmlUtils
	options = {:max_size => 10, :label => attribute.to_s.capitalize}.merge(options)
	parent_model, child_model = object.to_s.camelize.constantize, attribute.to_s.singularize.camelize.constantize
	@controller = self

	define_method("add_#{attribute.to_s.singularize}_to_#{object}") do
		instance_variable_set("@#{object}", parent_model.find(params[:business_id]))
		collection = instance_variable_get("@#{object}").send(attribute.to_s)
		if collection.size >= options[:max_size]
			flash[:alert] = _("Can't add. This %s already has %d %s.") % [object, options[:max_size], attribute]
		else
			if params[:subcategory_id].to_i > 0
				collection << child_model.find(params[:subcategory_id]) rescue flash[:alert] = _('%s already linked to this %s.') % [attribute.to_s.capitalize.singularize, object]
			else
				c = Category.find_or_create_by_name(params[:categories])
				collection << child_model.find_or_create_by_name_and_category_id(params[:subcategory_id], c[:id])
			end
		end
		redirect_to :action => 'edit', :id => instance_variable_get("@#{object}")[:id]
		# many_to_many_field(nil, object, attribute, options[:label], child_model.find_all, options[:m2m_field_options].merge(:controller => self))
	end

	define_method("remove_#{attribute.to_s.singularize}_from_#{object}") do
		instance_variable_set("@#{object}", parent_model.find(params[:business_id]))
		instance_variable_get("@#{object}").send(attribute).delete(child_model.find(params[:subcategory_id]))
		redirect_to :action => 'edit', :id => instance_variable_get("@#{object}")[:id]
		#raise many_to_many_field(nil, object, attribute, options[:label], child_model.find_all, options[:m2m_field_options].merge(:controller => self))
	end
end