django objects.create()
SomeModel.objects.create(firstname='ricky', lastname='ticky')django objects.create()
SomeModel.objects.create(firstname='ricky', lastname='ticky')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'})django get or create object
try:
obj = Person.objects.get(first_name='John', last_name='Lennon')
except Person.DoesNotExist:
obj = Person(first_name='John', last_name='Lennon', birthday=date(1940, 10, 9))
obj.save()
Here, with concurrent requests, multiple attempts to save a Person with the same parameters may be made. To avoid this race condition, the above example can be rewritten using get_or_create() like so:
obj, created = Person.objects.get_or_create(
first_name='John',
last_name='Lennon',
defaults={'birthday': date(1940, 10, 9)},
)
Any keyword arguments passed to get_or_create() — except an optional one called defaults — will be used in a get() call. If an object is found, get_or_create() returns a tuple of that object and False.objects.filter django
>>> Entry.objects.filter(blog_id=4)django 3.0 queryset examples
>>> Entry.objects.filter(
... headline__startswith='What'
... ).exclude(
... pub_date__gte=datetime.date.today()
... ).filter(
... pub_date__gte=datetime.date(2005, 1, 30)
... )Copyright © 2021 Codeinu
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