Hi everyone.

i am trying to tweak an addon i purchased last year for my company. (mrp tags)
i have done 90% tweaks and its coming along very nicely. one point which i am unable to grasp / solve is filter..
to me it seems, i am pretty close, but unable to grasp domain filter completely.
BTW, using odoo13.

on pointer 3 ( trying to solve subcontract) part, where each rec name has equivalent inventory product (type=service) with 2 or 3 vendors (contacts in it) as supplier of service. >> 

my model looks like 
------------------------------------------

-------mrp_custom_checklist.py---------

------------------------------------------
class MrpCustomChecklist(models.Model):

​_inherit = 'mrp.production'

​ partner_id = fields.Many2one('res.partner', string='Partner')

​@api.model

​def get_service_vendors(self):

​ ​service_products = self.env['product.product'].search([('type', '=', 'service')])

​ ​vendor_ids = service_products.mapped('seller_ids.name.id')

​ ​vendor_records = self.env['res.partner'].browse(vendor_ids)

​ ​vendor_names = vendor_records.mapped('name')

​ ​return vendor_names

​ @api.model

​ def get_named_service_vendors(self,product_name):

​ ​ service_product = self.env['product.product'].search([('type', '=', 'service'), ('name', 'ilike', product_name)], limit=1)

​ ​ vendor_ids = service_product.mapped('seller_ids.name.id')

​ ​ vendor_records = self.env['res.partner'].browse(vendor_ids)

​ ​ vendor_names = vendor_records.mapped('name')

​ ​ return vendor_names

and XML looks like 
------------------------------------------

-------mrp_custom_checklist.xml---------

------------------------------------------

" rel="ugc">ir.ui.view">

​ mrp.custom.checklist.form

​ ​

​ ​

​ ​ ​

​ ​ ​

​ ​ ​  

===========

PROBLEM

==========

Field 'get_service_vendors' used in attributes must be present in view but is missing:

• 'get_service_vendors' in domain="[('id', 'in', get_service_vendors())]"

Error context: View mrp.custom.checklist.form

 
any ideas.??