nyumbang.auth
Lamun ForeignKey dihapus dina Django, sagala rékaman pakait dina database bakal dihapus ogé.
-models foreign-key cascade I have a model with a ForeignKey to another model. When the referenced model is deleted, I want the ForeignKey to be set to NULL. How can I do that? Read this post in context
Django - how to get all objects from one table which are not in another table? django I have two models: class Product(models.Model): name = models.CharField(max_length=255) price = models.DecimalField(decimal_places=2, max_digits=10) class OrderItem(models.Model): product = models.ForeignKey('Product', on_delete=models.CASCADE) quantity = models.IntegerField() def __str__(self): return self.product How can i get all products which are not in OrderItem? Read this post in context
Django - how to create an object with a foreign key that doesn't exist yet django I am trying to create an object with a foreign key that doesn't exist yet (the user). The user will be created after the object is created and then it will be assigned as the foreign key for the object later on when it exists (in another view). This is my code: def add_to_cart(request, pk): product = get_object_or_404(Product, pk=pk) orderitem, created = OrderItem.objects ... Read this post in context
Django - kumaha carana nyieun hiji obyék kalawan konci asing nu teu acan aya Django Kuring keur nyobaan nyieun hiji obyék ku konci asing nu teu acan aya (pamaké). Pamaké bakal dijieun sanggeus obyék dijieun lajeng eta bakal ditugaskeun salaku konci asing pikeun obyék engké on nalika eta aya (dina pintonan séjén). Ieu kode kuring: def add_to_cart(request, pk): product = get_object_or_404(Product, pk=pk) orderitem, dijieun = OrderItem.objects ... Baca pos ieu dina konteks
Django - kumaha carana nyieun hiji obyék kalawan konci asing nu teu acan aya Django Kuring keur nyobaan nyieun hiji obyék ku konci asing nu teu acan aya (pamaké). Pamaké bakal dijieun sanggeus obyék dijieun lajeng eta bakal ditugaskeun salaku konci asing pikeun obyék engké on nalika eta aya (dina pintonan séjén). Ieu kode kuring: def add_to_cart(request, pk): product = get_object_or_404(Product, pk=pk) orderitem, dijieun = OrderItem.objects ... Baca pos ieu dina konteks
Kumaha carana abdi tiasa ngadamel Django ngagunakeun sandi custom sorangan algoritma hashing? django Abdi hoyong Django ngagunakeun sandi custom sorangan algoritma hashing tinimbang standar na. Kumaha carana abdi tiasa ngalakukeun ieu? Baca pos ieu dina konteks
Daptar eusi
Naon ForeignKey
ForeignKey mangrupikeun widang modél anu ngarujuk modél dina modél sanés.
on_delete pilihan
Aya sababaraha pilihan anu béda pikeun nanganan ngahapus di Django. Pilihan pangbasajanna nyaéta ngagunakeun fungsi delete():
mupus (obyek)
Ieu bakal ngahapus obyék tina pangkalan data sareng data anu aya hubunganana. Upami obyék mangrupikeun conto modél, éta ogé bakal ngabatalkeun widang anu aya hubunganana.
Pilihan séjén nyaéta ngagunakeun fungsi ngancurkeun ():
