odoo/odoo — pull request #3256 by rco-odoo (2014-10-23 07:55:45+00:00)
Title: [IMP] fields: infer required=True on related fields

One can infer related=True on a non-stored related field if all fields on the
path are related. This cannot be done if the related field is stored: when you
create a record, the database row is created first, and the related field is
computed and stored afterwards. Making the field required in that case would
trigger a non-null constraint violation.

Fixes #3231