What version of rails do you use? This setup works fine for me on 3.1.3 and 3.2.1
On Jan 30, 10:52 am, Duane Morin <li...@ruby-forum.com> wrote: > Hi. I'm hoping somebody can tell me that I've just gotten my syntax > wrong and I can in fact do what I want to do. > > I've got a Group, and a Group has_many Campaigns. > > Campaign has_and_belongs_to_many Users (and, naturally, vice versa). > > So I've got a groups table, a campaigns table (that has a group_id), a > campaigns_users join table (with campaign_id and user_id), and a users > table (who basically is left not belonging to anyone). > > My question is this -- starting from Group I want to reach through that > HABTM and point directly at the Users who belong to this Group. I've > successfully done it by writing my own finder_sql, or by just cheating > and collapsing all the camaign.users together. But I'm working on a > user interface for this and I'd like my list of users to behave just > like any other activerecord operation so that I can page through them, > sort arbitrarily on columns and so on exactly as if I'd originally just > had "Group has many Users". > > I was hoping that this would work: > > class Group > has_many :campaigns > has_many :users, :through=>:campaigns > > class Campaign > has_and_belongs_to_many :users > > But it doesn't, all I ever get is > ActiveRecord::HasManyThroughSourceAssociationMacroError: Invalid source > reflection macro :has_and_belongs_to_many for has_many :users, :through > => :campaigns. Use :source to specify the source reflection. > > However I don't understand what it wants in the :source option. It's > not like I mucked around with any class_names. (Well, technically this > is inheriting an old database so the actual table names are being > overridden, but I'm hoping that's not it! it's not as if I'm getting > bad SQL generated because an assumed table name does not exist). > > Thanks! > > -- > Posted viahttp://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
