Hi,

I'd tried with onchange in model_b.py like this:

@api.onchange('get_value_c')
 def onchange_get_value_c(self):
    for rec in self:
       if rec.get_value_c and rec.o_2_m:
          for line in rec.get_value_c:
             find_c = self.env["model.c"].search([('num_c', '=', line.num_c)])
             find_a = self.env["model.a"].search([('num_a', '=', line.num_a)])
             #compare value of num_c with num_a
             if find_c.num_c == find_a.num_a:
                 for abc in rec.o_2_m:
                    return {'domain': {'o_2_m': [('num_a','=', abc.find_a.id)]}}

But it still not works.

Hi,

May i know how data is entered in one2many..??

Your onchange works only if you have data in get_value_c and o_2_m

Hi Karthikeyan,

The data already have in model_a.py . So the one2many field of model_b.py connected with many2one field in model_a.py. Then, when click on the "Add a line" link of one2many field, it will show all the already records of model_a.py. without filtering.

This means that, first, the data must be fill in model_a.py.

After that, when the user wants to filter the records which have relate value of num_a for selecting. Then they must be fill value in num_c. Of course, the scenario related to field 'num_c' will be built properly.

If the user don't want to filtering, then they don't need to select in many2one 'get_value_c', then when click on "Add a line" link. It will show all the records without filtering.

Domain Based on Another field: https://www.youtube.com/watch?v=IpXXYCsK2ow