[FIX] repair: sequence at creation

- Create a repair order
- Cancel the creation
- Create another repair order

There is a gap in the sequence number.

The gap is due to the fact that the sequence number is consumed by the
`default_get`.

Although this is a change of behavior, the actual one is not really
expected. Even if a gap is possible with the sequence, we don't want to
consume a number every time we get the default values.

opw-2301412

closes odoo/odoo#55005

X-original-commit: 9d7d618220e27024321a75be0058db2289115af2
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/repair/models/repair.py

@@ -22,7 +22,7 @@ class Repair(models.Model):
 
     name = fields.Char(
         'Repair Reference',
-        default=lambda self: self.env['ir.sequence'].next_by_code('repair.order'),
+        default='/',
         copy=False, required=True,
         states={'confirmed': [('readonly', True)]})
     product_id = fields.Many2one(
@@ -203,6 +203,12 @@ class Repair(models.Model):
                 raise UserError(_('You can not delete a repair order which is linked to an invoice which has been posted once.'))
         return super().unlink()
 
+    @api.model
+    def create(self, vals):
+        if vals.get('name', '/') == '/':
+            vals['name'] = self.env['ir.sequence'].next_by_code('repair.order') or '/'
+        return super(Repair, self).create(vals)
+
     def button_dummy(self):
         # TDE FIXME: this button is very interesting
         return True