Django query code example

Example 1: q django

from django.db.models import Q

Q(question__startswith='Who') | Q(question__startswith='What')

Example 2: how to check if given primary key exists in django model

If using the object ---
try:
   obj = model1.objects.get(pk=20)
except DoesNotExist:
   ###do something####
    
Else ----
if model1.objects.filter(pk=20).exists():
   ###do something###
else:
  ###do otherthing###

Example 3: django objects.create()

SomeModel.objects.create(firstname='ricky', lastname='ticky')

Example 4: django q objects

from django.db.models import Q

obj, created = Person.objects.filter(
    Q(first_name='Bob') | Q(first_name='Robert'),
).get_or_create(last_name='Marley', defaults={'first_name': 'Bob'})

Example 5: and in django query filter

Blog.objects.filter(entry__headline__contains='Lennon', entry__pub_date__year=2008)

Example 6: objects.filter django

>>> Entry.objects.filter(blog_id=4)