[FIX] stock: Enable searching on lot's product qunatity

Steps:
- In ``stock.production.lot`` list view, use the filter 'Expiration Alerts'

Issue:
Every lots with ``product_expiration_alert`` set to True are returned but also the ones
with ``product_qty`` set to 0.0.

Reason:
The ``StockProductionLot.product_expiration_alert`` represents lots with expiration before or equal to the current date
but don't consider the quantity of product on hand.

Solution:
After discussing with Thomas (THD), and Tiffany (TIC) the solution is to add a new custom search function on the compute
field ``product_qty`` that will be used with the 'Expiration Alerts' filter to solve the problem.

opw-3474622

closes odoo/odoo#137251

X-original-commit: 09f1a45ccbb8b463e7d9326a25c2b0b18173b133
Signed-off-by: Tiffany Chang (tic) <tic@odoo.com>
Signed-off-by: Eteil Junior Djoumatchoua (etdj) <etdj@odoo.com>

addons/stock/models/stock_lot.py

@@ -4,10 +4,21 @@
 from operator import attrgetter
 from re import findall as regex_findall, split as regex_split
 
+import operator as py_operator
+
 from odoo import _, api, fields, models
 from odoo.exceptions import UserError, ValidationError
 from odoo.osv import expression
 
+OPERATORS = {
+    '<': py_operator.lt,
+    '>': py_operator.gt,
+    '<=': py_operator.le,
+    '>=': py_operator.ge,
+    '=': py_operator.eq,
+    '!=': py_operator.ne
+}
+
 
 class StockLot(models.Model):
     _name = 'stock.lot'
@@ -33,7 +44,7 @@ class StockLot(models.Model):
         'uom.uom', 'Unit of Measure',
         related='product_id.uom_id', store=True)
     quant_ids = fields.One2many('stock.quant', 'lot_id', 'Quants', readonly=True)
-    product_qty = fields.Float('Quantity', compute='_product_qty')
+    product_qty = fields.Float('Quantity', compute='_product_qty', search='_search_product_qty')
     note = fields.Html(string='Description')
     display_complete = fields.Boolean(compute='_compute_display_complete')
     company_id = fields.Many2one('res.company', 'Company', required=True, index=True, default=lambda self: self.env.company.id)
@@ -165,6 +176,22 @@ class StockLot(models.Model):
             quants = lot.quant_ids.filtered(lambda q: q.location_id.usage == 'internal' or (q.location_id.usage == 'transit' and q.location_id.company_id))
             lot.product_qty = sum(quants.mapped('quantity'))
 
+    def _search_product_qty(self, operator, value):
+        domain = [
+            ('lot_id', '!=', False),
+            '|', ('location_id.usage', '=', 'internal'),
+            '&', ('location_id.usage', '=', 'transit'), ('location_id.company_id', '!=', False)
+        ]
+        lots_w_qty = {
+            id: qty for id, qty in map(lambda l: (l['lot_id'][0], l['quantity']), self.env['stock.quant'].read_group(domain=domain, fields=['quantity:sum'], groupby=['lot_id']))
+        }
+        all_lots = self.env['stock.lot'].search([])
+        ids = []
+        for lot in all_lots:
+            if OPERATORS[operator](lots_w_qty.get(lot.id, 0), value):
+                ids.append(lot.id)
+        return [('id', 'in', ids)]
+
     def action_lot_open_quants(self):
         self = self.with_context(search_default_lot_id=self.id, create=False)
         if self.user_has_groups('stock.group_stock_manager'):