Django: what is the difference (rel & field)
If you discovered ManyToManyRel by digging into the source code, you can read the docstrings for the class. It's not documented anywhere - on purpose, because it's not for external use. It is certainly not meant for defining actual field relationships between models.
What is the difference between Django's models.ManyToManyField and models.ManyToManyRel? I'm confused about this stuff.