#29799: Allow registration and unregistration of lookups per field instances.
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Reporter: Simon Charette | Owner: Can
| Sarıgöl
Type: New feature | Status: assigned
Component: Database layer | Version: dev
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 1
Needs tests: 0 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
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Comment (by Himanshu Balasamanta):
@carltongibson , @charettes . I wanted to clarify exactly what all the
scope of the ticket covers.
As per my understanding,
- Enable registration and remove a lookup for a particular instance as
opposed to a class.
- Enable lookups registered for the class to be unregistered (and maybe
re-registered?) for instances of that class.
Description of the functions would be as follows
- get_lookups()
- when called by a field instance, returns all class and instance
lookups currently registered for that field instance
- when called by a class, returns all class lookups currently registered
for that class
- register_lookup
- when called by a field instance, registers the lookup for that field
instance
- when called by a class, registers the lookup for that class
- unregister_lookup
1. when called by a field instance,
- if the lookup is already registered with the instance, it gets
removed,
- if the lookup is registered with the instance class, that particular
instance is exempted
- else throws error
2. when called by a class, if the lookup is already registered with the
class, it is removed. Else error is thrown.
Doubts:
1. Should class lookups that are unregistered for an instance be re-
registered using the register_lookup method itself?
2. Should there be a method to specifically get lookups that were
registered for the instance and not the class?
--
Ticket URL: <https://code.djangoproject.com/ticket/29799#comment:6>
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