[FIX] product_expiry: fix MemoryError on module installation.

In large databases with > 2M stock_move_lines, installing
the product_expiry module can raise a MemoryError because the
field_cache is overfilled by the computation of the expiration_date
computed stored field.

Adding an _auto_init for this field prevent such errors from being
raised by creating the column manually.

closes odoo/odoo#116456

X-original-commit: 8b82d3154858582f6d321bd6473557fc192af25f
Signed-off-by: William Henrotin (whe) <whe@odoo.com>

addons/product_expiry/models/stock_move_line.py

@@ -4,6 +4,7 @@
 import datetime
 
 from odoo import api, fields, models
+from odoo.tools.sql import column_exists, create_column
 
 
 class StockMoveLine(models.Model):
@@ -17,6 +18,16 @@ class StockMoveLine(models.Model):
     use_expiration_date = fields.Boolean(
         string='Use Expiration Date', related='product_id.use_expiration_date')
 
+    def _auto_init(self):
+        """ Create column for 'expiration_date' here to avoid MemoryError when letting
+        the ORM compute it after module installation. Since both 'lot_id.expiration_date'
+        and 'product_id.use_expiration_date' are new fields introduced in this module,
+        there is no need for an UPDATE statement here.
+        """
+        if not column_exists(self._cr, "stock_move_line", "expiration_date"):
+            create_column(self._cr, "stock_move_line", "expiration_date", "timestamp")
+        return super()._auto_init()
+
     @api.depends('product_id', 'picking_type_use_create_lots', 'lot_id.expiration_date')
     def _compute_expiration_date(self):
         for move_line in self: