Hello Everyone, I was having some problems with many to many relationships. To make things simpler, I tried the examples from the datamapper website (http://datamapper.org/doku.php?id=docs:associations), modifying the code a little bit:
class Photo include DataMapper::Resource property :photo_id, Serial property :name, String has n, :taggings has n, :tags, :through => :taggings, :mutable => true end class Tag include DataMapper::Resource property :tag_id, Serial property :name, String has n, :taggings has n, :photos, :through => :taggings, :mutable => true end class Tagging include DataMapper::Resource property :tagging_id, Serial belongs_to :tag belongs_to :photo end When I try to do the following in irb: p = Photo.new(:name => 'First Photo') => #<Photo photo_id=nil name="First Photo"> irb(main):002:0> p.save => true irb(main):003:0> t = Tag.new(:name => 'cool') => #<Tag tag_id=nil name="cool"> irb(main):004:0> t.save => true irb(main):005:0> p.tags << t => [#<Tag tag_id=1 name="cool">] irb(main):006:0> p.save After the last line, I get the following error: undefined method `attach_parent' for #<DataMapper::Associations::RelationshipChain:0xb73274d8> Is this a bug or am I doing something wrong? I'm using MySQL and my DataMapper version is 0.9.10. Thanks for the help guys! --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "DataMapper" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/datamapper?hl=en -~----------~----~----~----~------~----~------~--~---
