add feature to automate when physical adjustment

models/stock_quant.py

@@ -0,0 +1,39 @@
+from odoo import api, models, fields, _
+from odoo.tools.float_utils import float_compare
+
+
+class StockQuant(models.Model):
+    _inherit = 'stock.quant'
+
+    def _get_inventory_move_values(self, qty, location_id, location_dest_id, package_id=False, package_dest_id=False):
+        """Override to handle automatic lot generation for inventory adjustments."""
+        # Check if we need to generate a lot for this inventory adjustment
+        if (self.product_id.tracking in ['lot', 'serial'] and
+            float_compare(qty, 0, precision_rounding=self.product_uom_id.rounding) > 0 and
+            not self.lot_id and
+            self.product_id.product_tmpl_id.lot_sequence_id):
+            
+            # Generate lot number using the product's sequence
+            lot_sequence = self.product_id.product_tmpl_id.lot_sequence_id
+            lot_name = lot_sequence.next_by_id()
+            
+            # Create the lot record
+            lot = self.env['stock.lot'].create({
+                'name': lot_name,
+                'product_id': self.product_id.id,
+                'company_id': self.company_id.id,
+            })
+            
+            # Update the quant with the new lot BEFORE creating the move
+            self.lot_id = lot.id
+
+        # Call the original method to get the move values
+        move_vals = super()._get_inventory_move_values(qty, location_id, location_dest_id, package_id, package_dest_id)
+        
+        # Make sure the lot_id is properly set in the move line values
+        if self.lot_id and 'move_line_ids' in move_vals:
+            for line_command in move_vals['move_line_ids']:
+                if line_command[0] in [0, 1] and line_command[2]:  # create or update command
+                    line_command[2]['lot_id'] = self.lot_id.id
+        
+        return move_vals