Hello everyone,

​I have been trying to create a custom module in Odoo. What I want to do is add some additional fields for res.company​ module. I also want res.partner​ module as contact details section for res.company​ with OneToMany relation. So far I have inherited res.company module for my custom module and created a One2many field with co-model as res.partner and inverse field as parent_id. I have also inherited xml form views of the company to include the custom fields that I have added. Here is the code for model and views.

Model class:

class ResCompany(models.Model):
	​_inherit = 'res.company'
	​contact_ids = fields.One2many('res.partner', 'parent_id', string='Contacts', domain=[('is_company', '=', False)])
	​comp_industry_type = fields.Many2one('res.partner.industry', string='Industry')

class ResPartner(models.Model):
	​_inherit = 'res.partner'
	​parent_id = fields.Many2one('res.company', string='Related Company', index=True)
	​is_company = fields.Boolean(string='Is a Company', default=False)

View:

    res.company.form.inherit
    res.company
    
    
        
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Records are being displayed in Contact Details tab as expected. But when I click on Add a line​ button I get the following error:

Traceback (most recent call last):
  File "D:\odoo-17.0\odoo\http.py", line 1765, in _serve_db
    return service_model.retrying(self._serve_ir_http, self.env)
  File "D:\odoo-17.0\odoo\service\model.py", line 133, in retrying
    result = func()
  File "D:\odoo-17.0\odoo\http.py", line 1792, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "D:\odoo-17.0\odoo\http.py", line 1996, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
  File "D:\odoo-17.0\odoo\addons\base\models\ir_http.py", line 222, in _dispatch
    result = endpoint(**request.params)
  File "D:\odoo-17.0\odoo\http.py", line 722, in route_wrapper
    result = endpoint(self, *args, **params_ok)
  File "d:\odoo-17.0\addons\web\controllers\dataset.py", line 24, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "d:\odoo-17.0\addons\web\controllers\dataset.py", line 20, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "D:\odoo-17.0\odoo\api.py", line 468, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "D:\odoo-17.0\odoo\api.py", line 453, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "d:\odoo-17.0\addons\web\models\models.py", line 1030, in onchange
    record._update_cache(changed_values)
  File "D:\odoo-17.0\odoo\models.py", line 6008, in _update_cache
    invf._update(inv_recs, self)
  File "D:\odoo-17.0\odoo\fields.py", line 4173, in _update
    records.modified([self.name])
  File "D:\odoo-17.0\odoo\models.py", line 6723, in modified
    todo = [self._modified([self._fields[fname] for fname in fnames], create)]
  File "D:\odoo-17.0\odoo\models.py", line 6723, in 
    todo = [self._modified([self._fields[fname] for fname in fnames], create)]
KeyError: 'contact_ids'

Where I am going wrong? Is there any other ways to implement the same? Any help is appreciated.