There seems to be a bug while using migration with table inheritance under symfony 1.4.
Every change I make on schema.yml in a model with column_aggregation table inheritance is not identified on doctrine doctrine:generate-migrations-diff task. Even though the models are properly re-build, I cannot map the changes on the migrations classes…
Word of advice: If you need to use migrations do not use doctrine’s table inheritance.
If anyone has something to say on this topic please do so!