Add bulk delete for purchase order line items (#4452)

* add bulk delete for purchase order line items

* bump API version

* fix JS style

* handle parts with no linked manufacturer part correctly

* add unit test for purchase order line item bulk delete

InvenTree/order/api.py

@@ -495,7 +495,7 @@ class PurchaseOrderLineItemFilter(rest_filters.FilterSet):
         return queryset
 
 
-class PurchaseOrderLineItemList(APIDownloadMixin, ListCreateAPI):
+class PurchaseOrderLineItemList(APIDownloadMixin, ListCreateDestroyAPIView):
     """API endpoint for accessing a list of PurchaseOrderLineItem objects.
 
     - GET: Return a list of PurchaseOrder Line Item objects

InvenTree/order/templates/order/purchase_order_detail.html

@@ -38,6 +38,22 @@
     </div>
     <div class='panel-content'>
         <div id='order-toolbar-buttons' class='btn-group' style='float: right;'>
+            {% if roles.purchase_order.change %}
+            {% if order.is_pending or allow_extra_editing %}
+            <div class='btn-group' role='group'>
+                <!-- Multiple-select actions -->
+                <button id='multi-select-options' class='btn btn-primary dropdown-toggle' data-bs-toggle='dropdown'>
+                    <span class='fas fa-tools'></span> <span class='caret'></span>
+                </button>
+                <ul class='dropdown-menu'>
+                    <li><a class='dropdown-item' href='#' id='po-lines-bulk-delete' title='{% trans "Delete Line Items" %}'>
+                        <span class='fas fa-trash-alt icon-red'></span> {% trans "Delete Line Items" %}
+                    </a></li>
+                </ul>
+            </div>
+            {% endif %}
+            {% endif %}
+
             {% include "filter_list.html" with id="purchase-order-lines" %}
         </div>
 

InvenTree/order/test_api.py

@@ -603,6 +603,26 @@ class PurchaseOrderLineItemTest(OrderTest):
         self.filter({'has_pricing': 1}, 0)
         self.filter({'has_pricing': 0}, 5)
 
+    def test_po_line_bulk_delete(self):
+        """Test that we can bulk delete multiple PurchaseOrderLineItems via the API."""
+        n = models.PurchaseOrderLineItem.objects.count()
+
+        self.assignRole('purchase_order.delete')
+
+        url = reverse('api-po-line-list')
+
+        # Try to delete a set of line items via their IDs
+        self.delete(
+            url,
+            {
+                'items': [1, 2],
+            },
+            expected_code=204,
+        )
+
+        # We should have 2 less PurchaseOrderLineItems after deletign them
+        self.assertEqual(models.PurchaseOrderLineItem.objects.count(), n - 2)
+
 
 class PurchaseOrderDownloadTest(OrderTest):
     """Unit tests for downloading PurchaseOrder data via the API endpoint."""