"Rel objects" for related fields.
"Rel objects" (for lack of a better name) carry information about the relation modeled by a related field and provide some utility functions. They're stored in the remote_field attribute of the field.
They also act as reverse fields for the purposes of the Meta API because they're the closest concept currently available.
| Class | ForeignObjectRel |
Used by ForeignObject to store information about the relation. |
| Class | ManyToManyRel |
Used by ManyToManyField to store information about the relation. |
| Class | ManyToOneRel |
Used by the ForeignKey field to store information about the relation. |
| Class | OneToOneRel |
Used by OneToOneField to store information about the relation. |