Constraints for cables

[dteknet]

Hello!

I want to limit one of the user's ability to create patch cords (cables) only between the devices of specific sites.
I was thinking about this constraint:

[{"termination_a__device__site__name__in": ["SITE-A", "SITE-B"]}, {"termination_b__device__site__name__in": ["SITE-A", "SITE-B"]}]
but getting this error:

Invalid filter for <class 'dcim.models.cables.Cable'>: Field 'termination_a' does not generate an automatic reverse relation and therefore cannot be used for reverse querying. If it is a GenericForeignKey, consider adding a GenericRelation.

Maybe someone has ideas on how to achieve this? Thank you!

[dteknet]

[{"_termination_a_device__site__name__in": ["SITE-A", "SITE-B"]}, {"_termination_b_device__site__name__in": ["SITE-A", "SITE-B"]}]

worked for me