[MIG] account_partner_account_number: migrate to 18.0

account_partner_account_number/models/__init__.py

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+from . import res_partner
+from . import account_move_line

account_partner_account_number/models/account_move_line.py

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+from odoo import fields, models, _, api
+
+
+class AccountMoveLine(models.Model):
+    _inherit = "account.move.line"
+
+    account_code = fields.Char(compute='get_account_code', string="Account code")
+
+    @api.depends('partner_id','account_id')
+    def get_account_code(self):
+        """
+            assign account number of partner if move line is receivable (Customers) or payable (Suppliers)
+        """
+        for account_move_line in self:
+            if account_move_line.account_id.id == account_move_line.partner_id.commercial_partner_id.property_account_receivable_id.id or \
+                    account_move_line.account_id.id == account_move_line.partner_id.commercial_partner_id.property_account_payable_id.id:                
+                account_move_line.account_code = account_move_line.partner_id.commercial_partner_id.account_code
+            else:
+                account_move_line.account_code = ''
+        

account_partner_account_number/models/res_partner.py

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+from odoo import fields, models, _
+
+
+class ResPartner(models.Model):
+    _inherit = "res.partner"
+
+    account_code = fields.Char('Account code')
+
+    _sql_constraints = [
+        ('account_coder_unique', 
+        'unique(account_code)',
+        'Choose another value of account code - it has to be unique!')
+    ]