feat: add company_id computed field to res.company model

models/__init__.py

@@ -6,4 +6,5 @@ from . import pos_payment_method
 from . import pos_session
 from . import pos_order
 from . import account_move
+from . import res_company
 

models/res_company.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from odoo import models, fields, api
+
+class ResCompany(models.Model):
+    _inherit = 'res.company'
+
+    company_id = fields.Many2one(
+        'res.company',
+        string='Company',
+        compute='_compute_company_id',
+        search='_search_company_id'
+    )
+
+    @api.depends()
+    def _compute_company_id(self):
+        for company in self:
+            company.company_id = company.id
+
+    def _search_company_id(self, operator, value):
+        return [('id', operator, value)]