Rename module sale_advance_payment_management to sale_down_payment

Add field amount_down_payment on sale.order

sale_down_payment/models/account_move_line.py

@@ -0,0 +1,32 @@
+# Copyright 2019 Akretion France (http://www.akretion.com)
+# @author Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
+
+
+class AccountMoveLine(models.Model):
+    _inherit = 'account.move.line'
+
+    sale_id = fields.Many2one('sale.order', string='Sale Order')
+    account_internal_type = fields.Selection(
+        related='account_id.user_type_id.type', store=True,
+        string='Account Internal Type')
+
+    @api.constrains('sale_id', 'account_id')
+    def sale_id_check(self):
+        for line in self:
+            if line.sale_id and line.account_id.internal_type != 'receivable':
+                raise ValidationError(_(
+                    "The account move line '%s' is linked to sale order '%s' "
+                    "but it uses account '%s' which is not a receivable "
+                    "account.")
+                    % (line.name,
+                       line.sale_id.name,
+                       line.account_id.display_name))
+
+    @api.onchange('account_id')
+    def sale_advance_payement_account_id_change(self):
+        if self.sale_id and self.account_id.user_type_id.type != 'receivable':
+            self.sale_id = False