#22492: provide a way to prevent database queries on model objects
-------------------------------------+-------------------------------------
Reporter: Chris Jerdonek | Owner: Raúl
| Cumplido
Type: New feature | Status: assigned
Component: Database layer | Version: dev
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
model,queryset,defer,only |
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Andrea F):
I want a feature that is similar to what was original described but for a
different use case: I have a Celery task that needs a model object in the
state it was when the task was enqueued, ''not'' in a state reflecting the
corresponding database row(s) when the task is processed. I pass the
object to the Celery task by serializing the entity (using
`django.serializers`) and saving exactly the information I want to make
available to the task.
This object model has complex inner workings and multiple foreign keys. I
want to be able to use the object model functionality and custom logic we
have implemented in the model class, but I do _not_ want it reading (or
writing) anything from the database after deserialization in the Celery
task.
For this I want something less "smart" than a feature that knows about
`only` and `defer` and `QuerySet` objects. For this I want to be able to
set a flag on an object that would disable any further database
interactions originating from that object.
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Ticket URL: <https://code.djangoproject.com/ticket/22492#comment:10>
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