I have been able to create a 1:M relationship using DataMapper and update the child items as well after creation. However, I have been unable to add to that collection.
Let's say I have class Parent include DataMapper::Resource property :id, Serial ... has n, :children end class Child include DataMapper::Resource property :id, Serial ... belongs_to :parent end Whenever I try to add to the child collection belonging to a certain parent instance, I get either DataMapper::UpdateConflictError or "DataObjects::IntegrityError: ERROR: duplicate key value violates unique constraint "children_pkey" DETAIL: Key (id)=(1) already exists. I have tried a whole host of approaches. The most promising seemed parent.children.create(attributes), but that led to the IntegrityError. What is the preferred approach for adding a new item to the collection? Thanks. -- 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.
