Datamapper DataMapper

Picture, if you will, the following DM models...

class Basket has n, :apples end

class Apple belongs_to :basket end

b = Basket.new

Now I want to add some apples...

b.apples.build # or... b.apples << Apple.new

In either case, the association object inside the Basket starts with @children = nil. As soon as I do either of the Apple-adding operations, the association's 'children' method is invoked (which attempts to grab existing children in order to initialize @children).

The problem here is that both the Basket and the Apple are new_records. I cannot envisage a scenario where it is appropriate to poll the database (as DM currently ends up doing) before the parent object even has an auto ID.

The net result here is that a batch importer I've been writing is firing off millions of unneeded queries when operating.