Georges Racinet

@leorochael you're right, it's better to discuss this in an open issue. PS: don't be surprised, I'll be mostly inactive till mid-september after b1 release.

The new unit test also shows that it didn't work at all for multiple databases (edited issue description as well)

This needs forward-porting to master

Do you mean for the field classes or for the fields instances in Models ? For the latter, I removed them deliberately in [4ee026ca8e92f9b8bef3cddbcb433c2b9f8774f5] to improve readability.

That'd be great, especially clarifying `configuration_groups` and the like.