I am trying to get the latest Django model object but cannot seem to succeed.
Neither of these are working:
obj = Model.objects.filter(testfield=12).latest()
obj = Model.objects.latest().filter(testfield=12)
This question is related to
python
django
django-models
django-queryset
See the docs from django: https://docs.djangoproject.com/en/dev/ref/models/querysets/#latest
You need to specify a field in latest(). eg.
obj= Model.objects.filter(testfield=12).latest('testfield')
Or if your model’s Meta specifies get_latest_by, you can leave off the field_name
argument to earliest() or latest()
. Django will use the field specified in get_latest_by
by default.
latest
is really designed to work with date fields (it probably does work with other total-ordered types too, but not sure). And the only way you can use it without specifying the field name is by setting the get_latest_by
meta attribute, as mentioned here.
obj= Model.objects.filter(testfield=12).order_by('-id')[:1]
is the right solution
Source: Stackoverflow.com