Hi Michael On Apr 20, 1:11 am, Michael Kebbekus <[email protected]> wrote: > Isn't this supposed to be a more efficient way of saying > Membership.all(:project_id => []).map(&:user) which returns []?
Yes it is. I don't know how your relationships are set up exactly, but the following example works for me: class Project include DataMapper::Resource property :id, Serial has n, :memberships has n, :users, :through => :memberships end class Membership include DataMapper::Resource belongs_to :project, :key => true belongs_to :user, :key => true end class User include DataMapper::Resource property :id, Serial has n, :memberships has n, :projects, :through => :memberships, :via => :project end DataMapper.finalize DataMapper.auto_migrate! project = Project.create user = User.create project.users << user project.save # you can grab users either via project: Project.all(:id => [project.id]).users # or membership Membership.all(:project_id => [project.id]).user Hope this helps Cheers! # solnic -- 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.
