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Added a compatibility function to support versions prior to Django 1.9

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This commit is contained in:
Justin Plock 2016-02-06 09:02:01 -05:00
parent 004408a9e8
commit 83e73cd5bb
2 changed files with 25 additions and 11 deletions
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13
rest_framework/compat.py
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@ -268,3 +268,16 @@ def get_all_related_many_to_many_objects(opts):
return opts.get_all_related_many_to_many_objects()
else:
return [r for r in opts.related_objects if r.field.many_to_many]
def get_remote_field(field):
"""
Django 1.9 removed usage of Rel objects, see
https://github.com/django/django/pull/4241
:param field: Field
:return: remote field
"""
if django.VERSION < (1, 9):
return field.rel
else:
return field.remote_field

23
rest_framework/utils/model_meta.py
View File

@ -14,7 +14,8 @@ from django.db import models
from django.utils import six
from rest_framework.compat import (
get_all_related_many_to_many_objects, get_all_related_objects
get_all_related_many_to_many_objects, get_all_related_objects,
get_remote_field
)
FieldInfo = namedtuple('FieldResult', [
@ -80,16 +81,16 @@ def get_field_info(model):
def _get_pk(opts):
pk = opts.pk
while pk.remote_field and pk.remote_field.parent_link:
while get_remote_field(pk) and get_remote_field(pk).parent_link:
# If model is a child via multi-table inheritance, use parent's pk.
pk = pk.remote_field.to._meta.pk
pk = get_remote_field(pk).to._meta.pk
return pk
def _get_fields(opts):
fields = OrderedDict()
for field in [field for field in opts.fields if field.serialize and not field.remote_field]:
for field in [field for field in opts.fields if field.serialize and not get_remote_field(field)]:
fields[field.name] = field
return fields
@ -104,10 +105,10 @@ def _get_forward_relationships(opts):
Returns an `OrderedDict` of field names to `RelationInfo`.
"""
forward_relations = OrderedDict()
for field in [field for field in opts.fields if field.serialize and field.remote_field]:
for field in [field for field in opts.fields if field.serialize and get_remote_field(field)]:
forward_relations[field.name] = RelationInfo(
model_field=field,
related_model=_resolve_model(field.remote_field.to),
related_model=_resolve_model(get_remote_field(field).to),
to_many=False,
to_field=_get_to_field(field),
has_through_model=False
@ -117,12 +118,12 @@ def _get_forward_relationships(opts):
for field in [field for field in opts.many_to_many if field.serialize]:
forward_relations[field.name] = RelationInfo(
model_field=field,
related_model=_resolve_model(field.remote_field.to),
related_model=_resolve_model(get_remote_field(field).to),
to_many=True,
# manytomany do not have to_fields
to_field=None,
has_through_model=(
not field.remote_field.through._meta.auto_created
not get_remote_field(field).through._meta.auto_created
)
)
@ -144,7 +145,7 @@ def _get_reverse_relationships(opts):
reverse_relations[accessor_name] = RelationInfo(
model_field=None,
related_model=related,
to_many=relation.field.remote_field.multiple,
to_many=get_remote_field(relation.field).multiple,
to_field=_get_to_field(relation.field),
has_through_model=False
)
@ -160,8 +161,8 @@ def _get_reverse_relationships(opts):
# manytomany do not have to_fields
to_field=None,
has_through_model=(
(getattr(relation.field.remote_field, 'through', None) is not None) and
not relation.field.remote_field.through._meta.auto_created
(getattr(get_remote_field(relation.field), 'through', None) is not None) and
not get_remote_field(relation.field).through._meta.auto_created
)
)