A property of a model that references another model instance.
This is a basic implementation of a "foreign key".
The value of this property can be either a key type (string|number), or a model instance, or the model data itself. It depends on the ModelInstanceFetcher.
A property of a model that references another model instance. This is a basic implementation of a "foreign key". The value of this property can be either a key type (string|number), or a model instance, or the model data itself. It depends on the ModelInstanceFetcher.