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Make all managers local for this model (ref #467)

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Sergey Tereschenko 2019-02-17 22:19:06 +02:00
parent 83005dc530
commit bbcd98d6dc
1 changed files with 3 additions and 17 deletions
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20
modeltranslation/translator.py
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@ -202,25 +202,12 @@ def add_manager(model):
""" """
if model._meta.abstract: if model._meta.abstract:
return return
# Make all managers local for this model to fix patching parent model managers
model._meta.local_managers = model._meta.managers
# Inspired by django.db.models.options.Options.managers (find all for current_manager in model._meta.local_managers:
# managers by following the normal Python MRO rules), but keeps the
# original managers instead of making copies.
managers = []
seen = set()
bases = [b for b in model.mro() if hasattr(b, '_meta')]
print("add_manager %s\n bases: %s" % (model._meta.label, bases))
for base in bases:
for manager in base._meta.local_managers:
if manager.name in seen:
continue
managers.append(manager)
seen.add(manager.name)
for current_manager in managers:
prev_class = current_manager.__class__ prev_class = current_manager.__class__
patch_manager_class(current_manager) patch_manager_class(current_manager)
print(" 1 patch_manager_class", current_manager)
if model._default_manager.__class__ is prev_class: if model._default_manager.__class__ is prev_class:
# Normally model._default_manager is a reference to one of model's managers # Normally model._default_manager is a reference to one of model's managers
# (and would be patched by the way). # (and would be patched by the way).
@ -229,7 +216,6 @@ def add_manager(model):
# share the same class. # share the same class.
model._default_manager.__class__ = current_manager.__class__ model._default_manager.__class__ = current_manager.__class__
patch_manager_class(model._base_manager) patch_manager_class(model._base_manager)
print(" 2 patch_manager_class", model._base_manager)
model._meta.base_manager_name = 'objects' model._meta.base_manager_name = 'objects'
model._meta._expire_cache() model._meta._expire_cache()