[autoform] Use fieldclass from kwargs in guess_field for non-final relations
This follows up on af969080e7e6 in which a "fieldclass" kwarg has been
added in EntityFieldsForm.field_by_name() before calling guess_field().
In this changeset, this value was only used for final relation but the
way non-final relation actually also changed since we also use
guess_field from these relation (previously, the field class specified
through uicfg was instantiated directly in
EntityFieldsForm.field_by_name()). So in the non-final case in
guess_field() we simply try to retrieve "fieldclass" from kwargs and
fall back to RelationField.
from yams.buildobjs import EntityType, SubjectRelation
from cubicweb.schemas.base import in_group, RELATION_MANAGERS_PERMISSIONS
# copy __permissions__ to avoid modifying a shared dictionary
in_group.__permissions__ = in_group.__permissions__.copy()
in_group.__permissions__['read'] = ('managers',)
class CWSourceSchemaConfig(EntityType):
cw_for_source = SubjectRelation(
'CWSource', inlined=True, cardinality='1*', composite='object',
__permissions__=RELATION_MANAGERS_PERMISSIONS)
cw_for_source = CWSourceSchemaConfig.get_relation('cw_for_source')
cw_for_source.__permissions__ = {'read': ('managers', 'users'),
'add': ('managers',),
'delete': ('managers',)}