[IMP] rma: prevent the creation of zero qty moves

rma/tests/test_rma.py

@@ -645,3 +645,16 @@ class TestRma(common.SavepointCase):
             self.assertTrue(new_line.product_id.categ_id.rma_customer_operation_id)
             new_line._onchange_product_id()
             self.assertEqual(new_line.operation_id, rma_operation)
+
+    def test_06_no_zero_qty_moves(self):
+        rma_lines = self.rma_customer_id.rma_line_ids
+        rma_lines.write({"receipt_policy": "delivered"})
+        self.assertEqual(sum(rma_lines.mapped("qty_to_receive")), 0)
+        wizard = self.rma_make_picking.with_context({
+            'active_ids': rma_lines.ids,
+            'active_model': 'rma.order.line',
+            'picking_type': 'incoming',
+            'active_id': 1
+        }).create({})
+        with self.assertRaisesRegex(ValidationError, "No quantity to transfer"):
+            wizard._create_picking()

rma/wizards/rma_make_picking.py

@@ -4,7 +4,7 @@
 import time
 from odoo import models, fields, api, _
 from odoo.exceptions import UserError, ValidationError
-from odoo.tools import DEFAULT_SERVER_DATETIME_FORMAT as DT_FORMAT
+from odoo.tools import DEFAULT_SERVER_DATETIME_FORMAT as DT_FORMAT, float_compare
 import odoo.addons.decimal_precision as dp
 
 
@@ -149,12 +149,18 @@ class RmaMakePicking(models.TransientModel):
         else:
             qty = item.qty_to_deliver
         values = self._get_procurement_data(item, group, qty, picking_type)
+        product = item.line_id.product_id
+        if float_compare(qty, 0, product.uom_id.rounding) != 1:
+            raise ValidationError(
+                _("No quantity to transfer on %s shipment of product %s.") %
+                (_(picking_type), product.default_code or product.name)
+            )
         # create picking
         try:
             self.env['procurement.group'].run(
-                item.line_id.product_id,
+                product,
                 qty,
-                item.line_id.product_id.product_tmpl_id.uom_id,
+                product.uom_id,
                 values.get('location_id'),
                 values.get('origin'),
                 values.get('origin'),