How to use "AND" in a Django filter?

Question

How do I create an "AND" filter to retrieve objects in Django? e.g I would like to retrieve a row which has a combination of two words in a single field.

For example the following SQL query does exactly that when I run it on mysql database:

SELECT * FROM myapp_question
WHERE ((question LIKE '%software%') AND (question LIKE '%java%'))

How do you accomplish this in Django using filters?

Asked By: gath

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Source

Answer 1

(update: this answer will not work anymore and give the syntax error keyword argument repeated)

mymodel.objects.filter(first_name__icontains="Foo", first_name__icontains="Bar")

update: Long time since I wrote this answer and done some django, but I am sure to this days the best approach is to use the Q object method like David Berger shows here: How do I use AND in a Django filter?

Answered By: Andrea Di Persio

Answer 2

You can chain filter expressions in Django:

q = Question.objects.filter(question__contains='software').filter(question__contains='java')

You can find more info in the Django docs at “Chaining Filters“.

Answered By: mipadi

Answer 3

For thoroughness sake, let’s just mention the Q object method:

from django.db.models import Q
criterion1 = Q(question__contains="software")
criterion2 = Q(question__contains="java")
q = Question.objects.filter(criterion1 & criterion2)

Note the other answers here are simpler and better adapted for your use case, but if anyone with a similar but slightly more complex problem (such as needing "not" or "or") sees this, it’s good to have the reference right here.

Answered By: David Berger

Answer 4

You can use AND with filter() using & or Q() and & as shown below:

# "store/views.py"

from .models import Question
from django.db.models import Q
from django.http import HttpResponse

def test(request):

    # With "&"
                                                              # ↓ Here
    qs = Question.objects.filter(question__contains="software") &  
         Question.objects.filter(question__contains="java")
    print(qs)

    # With "Q()" and "&"
                               # ↓ Here                         # ↓ Here
    qs = Question.objects.filter(Q(question__contains="software") & 
                                 Q(question__contains="java"))
    print(qs)                  # ↑ Here

    return HttpResponse("Test")

Answered By: Kai – Kazuya Ito

How to use "AND" in a Django filter?

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