[FIX] stock_picking_batch_custom: require collected before batch validation

stock_picking_batch_custom/models/stock_picking_batch.py

@@ -4,6 +4,7 @@
 from odoo import api
 from odoo import fields
 from odoo import models
+from odoo.exceptions import UserError
 
 
 class StockPickingBatch(models.Model):
@@ -139,6 +140,31 @@ class StockPickingBatch(models.Model):
             else:
                 batch.summary_line_ids = [fields.Command.clear()]
 
+    def _check_all_products_collected(self):
+        """Ensure all product summary lines are marked as collected before done."""
+        for batch in self:
+            not_collected_lines = batch.summary_line_ids.filtered(
+                lambda line: not line.is_collected
+            )
+            if not not_collected_lines:
+                continue
+
+            product_names = ", ".join(
+                not_collected_lines.mapped("product_id.display_name")
+            )
+            message = batch.env._(
+                "You must mark all product lines as collected before validating the batch."
+            )
+            if product_names:
+                message += "\n" + batch.env._(
+                    "Pending products: %(products)s", products=product_names
+                )
+            raise UserError(message)
+
+    def action_done(self):
+        self._check_all_products_collected()
+        return super().action_done()
+
 
 class StockPickingBatchSummaryLine(models.Model):
     _name = "stock.picking.batch.summary.line"