Hi, 

I have 3 many2many fields in a form, every field has a list of various items every item can be assigned to a different stage (Installation,  Operation, Development, finished), what I want now is a way to filter the many2many with a button.  

The source for the many2many field is like this:

Id

name

code

stage_id   ---> many2one field from another model, This is the field that I want  to filter 

The filter has to be set until the data is on the screen.  Tried assigned a domain with a button, but I can't make it work:

  result = {
            'domain': {
                'protocolos_ids': [['stage_id', '=', 1]],   # could be 1,2,3,4
            },
        }
return result 

tried also with a a Many2one field

'protocolos_ids': [['stage_id', '=', stage_id]], //many2on field

But to no avail

Please help.

Thank you