First, BRAVO for this wonderful plugin: has_many_polymorphs ! Now my problem:
4 models : Collection, Page, Fragment, Belonging (which is the join table):
1 class Collection < ActiveRecord::Base 2 has_many_polymorphs :elements, 3 :through => :belongings, 4 :from => [:pages, :fragments, :collections], 5 :as => :collector, 6 :parent_order => 'belongings.position' 7 end
1 class Page < ActiveRecord::Base 2 has_many :fragments 3 end
1 class Fragment < ActiveRecord::Base 2 belongs_to :page 3 end
1 class Belonging < ActiveRecord::Base 2 belongs_to :collector, 3 :class_name => "Collection", 4 :foreign_key => "collector_id" 5 belongs_to :element, :polymorphic => true 6 acts_as_list :scope => 'element_id=#{element_id} and element_type=#{quote_value element_type}' 7 end
The belongings database table structure:
collector_id (integer) ; element_id (integer) ; element_type (string) ; position (integer)
The self referential polymorphic aspect works like a charm! But the acts_as_list doesn't! Here a demonstration inside the console:
c = Collection.create(:name => "C1") c.elements << Page.create(:name => "P1") c.elements << Page.create(:name => "P2") y c
--- &id006 !ruby/object:Collection attributes: name: C1 updated_at: &id001 2007-11-14 13:17:45.877143 +01:00 id: 1 created_at: *id001 belongings: - !ruby/object:Belonging attributes: updated_at: 2007-11-14 13:18:39 element_id: "1" id: "1" collector_id: "1" element_type: Page position: "1" created_at: 2007-11-14 13:18:39 - !ruby/object:Belonging attributes: updated_at: 2007-11-14 13:19:06 element_id: "2" id: "2" collector_id: "1" element_type: Page position: "1" created_at: 2007-11-14 13:19:06 elements: - &id003 !ruby/object:Page attributes: name: P1 updated_at: &id002 2007-11-14 13:18:39.397292 +01:00 id: 1 created_at: *id002 errors: !ruby/object:ActiveRecord::Errors base: *id003 errors: {}
new_record: false new_record_before_save: true - &id005 !ruby/object:Page attributes: name: P2 updated_at: &id004 2007-11-14 13:19:06.052972 +01:00 id: 2 created_at: *id004 errors: !ruby/object:ActiveRecord::Errors base: *id005 errors: {}
new_record: false new_record_before_save: true errors: !ruby/object:ActiveRecord::Errors base: *id006 errors: {}
new_record: false new_record_before_save: true => nil
c.elements.first.move_to_bottom
NoMethodError: undefined method `move_to_bottom' for #<Page:0x3318ba4> from /opt/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/base.rb:1860:in `method_missing' from (irb):8
I would be very pleased if you could help me ...
