 <p>Django relations model exposes (and documents) only <em>OneToOneField</em>, <em>ForeignKey</em> and <em>ManyToManyField</em>, which corresponds to the inner</p> <ul> <li><strong>OneToOneField</strong> -> <strong>OneToOneRel</strong></li> <li><strong>ForeignKey</strong> -> <strong>ManyToOneRel</strong></li> <li><strong>ManyToManyField</strong> -> <strong>ManyToManyRel</strong></li> </ul> <p>See source of <em>django.db.models.fields.related</em> for further details.</p>