Filtering objects based on two attributes being the same

Question

With regards to the below model, how could I filter through existing objects so that I find only objects where ‘Name’ contains a certain word, for example, "Green" but also where the vendor of the object may contain "Green"? I am of course referring to the value (assuming same type although in this example I am using char and text field).

class Hat(models.Model):
    Name = models.CharField(max_length=255, unique = False)
    Size = models.IntegerField(choices=list(zip(range(1, 11), range(1, 11))), unique=False)
    Vendor = models.TextField(max_length=255, unique = False)

List = [for Hat in Hat.objects.filter(Name__contain="Green")]

Asked By: Kieran

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Source

Answer 1

You can .filter(…) ^[Django-doc] with:

from django.db.models import Q

Hat.objects.filter(Name__contains='Green', Vendor__contains='Green', _connector=Q.OR)

Note: normally the name of the fields in a Django model are written in snake_case, not PascalCase, so it should be: vendor instead of ~~Vendor~~.

Note: For case-insensitive matches, you can use the __icontains lookup ^[Django-doc]. Case insitive matching is not equivalent to converting the two operands to lowercase: case insensitive matching is more sophisticated since some characters have no uppercase or lowercase variant, and there are certain rules when two characters are considered the same in an case-insenstive manner.

Answered By: Willem Van Onsem

Filtering objects based on two attributes being the same

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