Hi,
I want to add a function on adding a many2many, and then on removing from many2many i want to add a different function as well.
If for example on adding customers in a many2many fields, followers are added for that saleorder,
then on removing from that many2many it should do the opposite remove follower from sale order.
How to solve this
You are mentioning a very specific difficult scenario. So you better provide more details about what you wanna get it done. The examples you provided aren't good enough