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Refs #18012 -- Removed special casing for proxy models deletion. 

This isn't required anymore now that reverse foreign keys
from proxy models are propagated to their concrete model.
This commit is contained in:
Simon Charette 2015-10-07 14:04:57 -04:00
parent 6c9f37ea9e
commit 8bdfabed65
1 changed files with 1 additions and 10 deletions
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11
django/db/models/deletion.py
View File

@ -1,5 +1,4 @@
from collections import Counter, OrderedDict
from itertools import chain
from operator import attrgetter
from django.db import IntegrityError, connections, transaction
@ -53,18 +52,10 @@ def DO_NOTHING(collector, field, sub_objs, using):
def get_candidate_relations_to_delete(opts):
# Collect models that contain candidate relations to delete. This may include
# relations coming from proxy models.
candidate_models = {opts}
candidate_models = candidate_models.union(opts.concrete_model._meta.proxied_children)
# For each model, get all candidate fields.
candidate_model_fields = chain.from_iterable(
opts.get_fields(include_hidden=True) for opts in candidate_models
)
# The candidate relations are the ones that come from N-1 and 1-1 relations.
# N-N (i.e., many-to-many) relations aren't candidates for deletion.
return (
f for f in candidate_model_fields
f for f in opts.get_fields(include_hidden=True)
if f.auto_created and not f.concrete and (f.one_to_one or f.one_to_many)
)