Menu
In django, what's the difference between a ManyToOneRel and a ForeignKey field?
454
The only difference between these two is that ForeignKey field consists of on_delete option along with a model's class because it's used for many-to-one relationships while on the other hand, the OneToOneField, only carries out a one-to-one relationship and requires only the model's class.
ForeignKey is a Django ORM field-to-column mapping for creating and working with relationships between tables in relational databases.
A foreign key relationship is generally known as a many-to-one relationship. Note that the reverse of this relationship is one-to-many (which Django provides tools to access). As the name implies, many objects may be related to one.
The on_delete method is used to tell Django what to do with model instances that depend on the model instance you delete. (e.g. a ForeignKey relationship). The on_delete=models. CASCADE tells Django to cascade the deleting effect i.e. continue deleting the dependent models as well.
Django relations model exposes (and documents) only OneToOneField, ForeignKey and ManyToManyField, which corresponds to the inner
See source of django.db.models.fields.related for further details.
179
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
