Persisted grandchildren not loaded through child

[rwd]

Scenario:

• three RDFSource models A, B and C
• A has children of class B
• B has children of class C
• create an A with a child B having a child C
• persist the instance of A

Expectations:

1. all of A, B and C should be persisted
2. after reloading A, its child B should be accessible through it, as should B's child C

Problem:
Expectation 1 is met, but 2 is not. The grandchild C accessed through the properties on A and B is not loaded despite being present in the repository.

The failures in this spec illustrate the problem: https://github.com/rwd/ActiveTriples/blob/spec-grandchild-persistence/spec/integration/grandchild_persistence_spec.rb

Is expectation 2 valid? If so, is this a bug?

[rwd]

Changing in ActiveTriples::Relation#make_node:

node = klass.from_uri(value, parent)

to:

node = klass.from_uri(value, final_parent)

makes the above spec pass, and does not cause failure of any others.

Is this a valid solution?