Allow orders' creation date edit via API (#6178)

* Add creation_date to the serializers of the Orders (to make it changeable by API)

Fixes #6159

* Add API tests for the creation_date field

* Fix missing , in test_api.py

* Allow null to be passed (transleted to current date later) for creation_date of the Orders in the serializers too

InvenTree/order/models.py

@@ -211,7 +211,6 @@ class Order(
         Ensures that the reference field is rebuilt whenever the instance is saved.
         """
         self.reference_int = self.rebuild_reference_field(self.reference)
-
         if not self.creation_date:
             self.creation_date = datetime.now().date()
 

InvenTree/order/serializers.py

@@ -97,6 +97,8 @@ class AbstractOrderSerializer(serializers.Serializer):
 
     barcode_hash = serializers.CharField(read_only=True)
 
+    creation_date = serializers.DateField(required=False, allow_null=True)
+
     def validate_reference(self, reference):
         """Custom validation for the reference field."""
         self.Meta.model.validate_reference_field(reference)

InvenTree/order/test_api.py

@@ -357,6 +357,39 @@ class PurchaseOrderTest(OrderTest):
             expected_code=201,
         )
 
+    def test_po_creation_date(self):
+        """Test that we can create set the creation_date field of PurchaseOrder via the API."""
+        self.assignRole('purchase_order.add')
+
+        response = self.post(
+            reverse('api-po-list'),
+            {
+                'reference': 'PO-19881110',
+                'supplier': 1,
+                'description': 'PO created on 1988-11-10',
+                'creation_date': '1988-11-10',
+            },
+            expected_code=201,
+        )
+
+        po = models.PurchaseOrder.objects.get(pk=response.data['pk'])
+        self.assertEqual(po.creation_date, datetime(1988, 11, 10).date())
+
+        """Ensure if we do not pass the creation_date field than the current date will be saved"""
+        creation_date = datetime.now().date()
+        response = self.post(
+            reverse('api-po-list'),
+            {
+                'reference': 'PO-11111111',
+                'supplier': 1,
+                'description': 'Check that the creation date is today',
+            },
+            expected_code=201,
+        )
+
+        po = models.PurchaseOrder.objects.get(pk=response.data['pk'])
+        self.assertEqual(po.creation_date, creation_date)
+
     def test_po_duplicate(self):
         """Test that we can duplicate a PurchaseOrder via the API."""
         self.assignRole('purchase_order.add')