[FIX] delivery: speed up delivery costs installation

Due to hefty data the RAM limit gets exhausted.
The process gets killed due to the computed field weight on
- stock.move
- stock.picking
When installing the delivery costs module.

To solve the problem:

We add the column weight to the DB schema.

Ticket ids:
- 3013955
- 2628251
- 3028081

closes odoo/odoo#107020

Signed-off-by: Arnold Moyaux (arm) <arm@odoo.com>

addons/delivery/models/__init__.py

@@ -7,5 +7,5 @@ from . import product_packaging
 from . import product_template
 from . import sale_order
 from . import partner
-from . import stock_picking
 from . import stock_move
+from . import stock_picking

addons/delivery/models/stock_move.py

@@ -2,12 +2,27 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from odoo import api, fields, models
-
+from odoo.tools.sql import column_exists, create_column
 
 
 class StockMove(models.Model):
     _inherit = 'stock.move'
 
+    def _auto_init(self):
+        if not column_exists(self.env.cr, "stock_move", "weight"):
+            # In case of a big database with a lot of stock moves, the RAM gets exhausted
+            # To prevent a process from being killed We create the column 'weight' manually
+            # Then we do the computation in a query by multiplying product weight with qty
+            create_column(self.env.cr, "stock_move", "weight", "numeric")
+            self.env.cr.execute("""
+                UPDATE stock_move move
+                SET weight = move.product_qty * product.weight
+                FROM product_product product
+                WHERE move.product_id = product.id
+                AND move.state != 'cancel'
+                """)
+        return super()._auto_init()
+
     weight = fields.Float(compute='_cal_move_weight', digits='Stock Weight', store=True, compute_sudo=True)
 
     @api.depends('product_id', 'product_uom_qty', 'product_uom')

addons/delivery/models/stock_picking.py

@@ -6,7 +6,7 @@ from collections import defaultdict
 
 from odoo import models, fields, api, _
 from odoo.exceptions import UserError
-
+from odoo.tools.sql import column_exists, create_column
 
 
 class StockQuantPackage(models.Model):
@@ -55,6 +55,25 @@ class StockQuantPackage(models.Model):
 class StockPicking(models.Model):
     _inherit = 'stock.picking'
 
+    def _auto_init(self):
+        if not column_exists(self.env.cr, "stock_picking", "weight"):
+            # In order to speed up module installation when dealing with hefty data
+            # We create the column weight manually, but the computation will be skipped
+            # Therefore we do the computation in a query by getting weight sum from stock moves
+            create_column(self.env.cr, "stock_picking", "weight", "numeric")
+            self.env.cr.execute("""
+                WITH computed_weight AS (
+                    SELECT SUM(weight) AS weight_sum, picking_id
+                    FROM stock_move
+                    WHERE picking_id IS NOT NULL
+                    GROUP BY picking_id
+                )
+                UPDATE stock_picking
+                SET weight = weight_sum
+                FROM computed_weight
+                WHERE stock_picking.id = computed_weight.picking_id;
+            """)
+        return super()._auto_init()
 
     @api.depends('move_line_ids', 'move_line_ids.result_package_id')
     def _compute_packages(self):