Add ordering mixin for class based generic views
|Reported by:||aaugustin||Owned by:||pjrharley|
|Has patch:||yes||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
Currently, if the model used by by a date-based generic view doesn't have an ordering and pagination is enabled, results will be random. Defining an ordering on the model isn't totally satisfying because it has global effects, and it adds an overhead to every query involving the model.
Another workaround is to define queryset = MyModel.objects.order_by('-<date_field>') in every view. But CBVs are precisely about removing as much boilerplate as possible.
So here's a draft of an API for ordering:
class BaseDateListView(...): ordering = None def get_ordering(self): return self.get_date_field() if self.ordering is None else self.ordering def get_dated_queryset(self, **lookups): ... if not qs.ordered(): qs = qs.order_by(self.get_ordering()) ...
self.get_ordering() could return '-<date_field>' for the archive view for backwards compatibility.
This would be a better fix for #18354.
Change History (12)
comment:3 Changed 4 years ago by jezdez
- Summary changed from Date-based generic views should enforce ordering to Add ordering mixin for class based generic views
comment:7 Changed 3 years ago by aaugustin
- Owner aaugustin deleted
- Status changed from assigned to new
comment:8 Changed 3 years ago by anonymous
- Has patch set
- Owner set to anonymous
- Status changed from new to assigned