[FIX] mrp: search workorders by finished_lot_id

Before this commit, it was impossible to search workorders by their
finished_lot_id as there was no search function for this field.
This commit adds the search function.

opw-3330126
community PR: https://github.com/odoo/odoo/pull/123223



closes odoo/odoo#123506

X-original-commit: b5f482d8
Signed-off-by: William Henrotin (whe) <whe@odoo.com>

addons/mrp/models/mrp_workorder.py

@@ -124,7 +124,7 @@ class MrpWorkorder(models.Model):
     finished_lot_id = fields.Many2one(
         'stock.lot', string='Lot/Serial Number', compute='_compute_finished_lot_id',
         inverse='_set_finished_lot_id', domain="[('product_id', '=', product_id), ('company_id', '=', company_id)]",
-        check_company=True)
+        check_company=True, search='_search_finished_lot_id')
     time_ids = fields.One2many(
         'mrp.workcenter.productivity', 'workorder_id', copy=False)
     is_user_working = fields.Boolean(
@@ -230,6 +230,9 @@ class MrpWorkorder(models.Model):
         for workorder in self:
             workorder.finished_lot_id = workorder.production_id.lot_producing_id
 
+    def _search_finished_lot_id(self, operator, value):
+        return [('production_id.lot_producing_id', operator, value)]
+
     def _set_finished_lot_id(self):
         for workorder in self:
             workorder.production_id.lot_producing_id = workorder.finished_lot_id