BooleanField and NullBooleanField Constraint for firebird 3+ #154
Description
BooleanField in firebird versions minors to 3 which doesn't suport boolean data type, Its was emulated with a smallint field with a check constraint to alow values just 1 or 0 or NULL if field is NullBooleanField [1]
Since firebird 3 wih bool data type support the contraint is no requiered any more, therefore it is not necessary set the check contraint at table level.
[1] NullBooleanFields was marked as deprecated sice django 4
PS:
In firerbird 3.0.x there are a bug removing a field with check contraint. At least django generated boolean fields with check contraint fails with the message "no current record for fetch operation At trigger ..."