Question

I have a Task model where every task has deadline.

class Tasks(models.Model):
    assigned_to = models.ForeignKey('Users', related_name='user_assigned_to')
    deadline = models.DateTimeField()
    status = models.CharField(max_length=20,null=True)

I need to filter out task that has deadline date earlier than today’s date with other filters.So I used this query:

all_task = Tasks.objects.filter(Q(assigned_to = i),Q(deadline<datetime.datetime.today()),~Q(status="Done"))

But this give me error:

NameError: name ‘deadline’ is not defined

If i changed the query to(just changing < sign to = ) :

all_task = Tasks.objects.filter(Q(assigned_to = i),Q(deadline=datetime.datetime.today()),~Q(status="Done"))

The above query returns me objects , but why it is not returning objects in case I use < or > with datetime?

Answer 1

Because using < is trying to use it as a name instead of a keyword argument.

..., Q(deadline__lt=datetime.datetime.today()), ....

“Field lookups”