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Fixes issue #175 (possible exception with custom managers hiding som… #176

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@JirkaV JirkaV commented Feb 6, 2021

As promised - use Django _default_manager to prevent exceptions when custom manager excludes certain model instances.

@JirkaV JirkaV changed the title Fix for Issue 175 (possible exception with custom managers hiding som… Fix for Issue #175 (possible exception with custom managers hiding som… Feb 6, 2021
@JirkaV JirkaV changed the title Fix for Issue #175 (possible exception with custom managers hiding som… Fixes issue #175 (possible exception with custom managers hiding som… Feb 6, 2021
@@ -68,7 +68,7 @@ def pre_save(sender, instance, raw, using, update_fields, **kwargs):

# created or updated?
if not created:
old_model = sender.objects.get(pk=instance.pk)
old_model = sender._default_manager.get(pk=instance.pk)

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_base_manager i think

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It should be _base_manager which will always return all records, the _default_manager may be filtering out records and can still raise an DoesNotExist exception.

@@ -68,7 +68,7 @@ def pre_save(sender, instance, raw, using, update_fields, **kwargs):

# created or updated?
if not created:
old_model = sender.objects.get(pk=instance.pk)
old_model = sender._default_manager.get(pk=instance.pk)
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@sgordon16
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sgordon16 commented Jul 23, 2024

_base_manager will always return all records, the _default_manager may be filtering out records and can still raise an DoesNotExist exception.
https://docs.djangoproject.com/en/5.0/topics/db/managers/#django.db.models.Model._base_manager

@rgbanasiak
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Is there a chance that the pull request will be accepted?

@adam-hrb
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Hi I also encountered this - could that be fixed?

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6 participants