[server] commit after serializing schema
Use separate transactions for schema serialization and postcreate
scripts execution, so that the latter can rely on the schema being
persistently stored. This matters e.g. if something in a postcreate
violates a unique_together constraint, we need the constraint persisted
in order to raise a meaningful error. See #4525069.
from cubicweb.schemas.base import in_group, CWSourceSchemaConfig
# copy __permissions__ to avoid modifying a shared dictionary
in_group.__permissions__ = in_group.__permissions__.copy()
in_group.__permissions__['read'] = ('managers',)
cw_for_source = CWSourceSchemaConfig.get_relation('cw_for_source')
cw_for_source.__permissions__ = {'read': ('managers', 'users'),
'add': ('managers',),
'delete': ('managers',)}