Opened 7 years ago

Last modified 7 years ago

#28958 closed Bug

Using query expression in model Meta.ordering causes AttributeError in admin — at Initial Version

Reported by: Gabriel Amram Owned by: nobody
Component: contrib.admin Version: 2.0
Severity: Release blocker Keywords: query expresssion, ordering, admin, meta
Cc: Mariusz Felisiak Triage Stage: Accepted
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

When using the newly introduced query-expression ordering feature in either the model's Meta.ordering or in its ModelAdmin causes errors.

Steps to reproduce:
First variant - using the model's Meta.ordering option - 

//models.py
class Game(models.Model):
    score = models.IntegerField(null=True)

     class Meta:
         ordering = [F("score").desc(nulls_last=True)]
...
// admin.py
admin.site.register(Game)

Accessing the admin site will now give an AttributeError: 'OrderBy' object has no attribute 'startswith'

Variant 2 - Using the ModelAdmin ordering attribute:

//admin.py
class GameAdmin(models.ModelAdmin):
    ordering = [F("score").desc(nulls_last=True)]

runserver fails with error: TypeError: argument of type 'OrderBy' is not iterable

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