Apply suggestions from code review

Co-authored-by: Denis Roussel (ACSONE) <[email protected]>

Author: sbejaoui

product_merge/wizards/product_merge_wizard.py

@@ -16,6 +16,7 @@ class ProductMergeWizard(models.TransientModel):
         string="Product Model",
         domain="[('id', 'in', product_ids)]",
         required=True,
+        ondelete="cascade"
     )
     product_ids = fields.Many2many(
         comodel_name="product.template", string="Products to Merge", required=True

product_merge/wizards/product_merge_wizard_line.py

@@ -9,9 +9,9 @@ class ProductMergeWizardLine(models.TransientModel):
     _name = "product.merge.wizard.line"
     _description = "Merge Products Wizard Line"
 
-    wizard_id = fields.Many2one("product.merge.wizard", string="Wizard", required=True)
+    wizard_id = fields.Many2one("product.merge.wizard", string="Wizard", required=True, ondelete="cascade")
     product_id = fields.Many2one(
-        comodel_name="product.product", string="Product", required=True
+        comodel_name="product.product", string="Product", required=True, ondelete="cascade"
     )
     attribute_value_ids = fields.Many2many(
         comodel_name="product.attribute.value",