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https://github.com/inventree/InvenTree
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Fix behaviour when deleting a StockLocation
Adds unit tests
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Oliver
parent
c329f6e8f8
commit
24af134a87
@ -54,6 +54,35 @@ class StockLocation(InvenTreeTree):
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Stock locations can be heirarchical as required
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"""
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def delete(self, *args, **kwargs):
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"""
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Custom model deletion routine, which updates any child locations or items.
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This must be handled within a transaction.atomic(), otherwise the tree structure is damaged
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"""
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with transaction.atomic():
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parent = self.parent
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tree_id = self.tree_id
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# Update each part in the stock location
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for item in self.stock_items.all():
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item.location = self.parent
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item.save()
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# Update each child category
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for child in self.children.all():
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child.parent = self.parent
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child.save()
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super().delete(*args, **kwargs)
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if parent is not None:
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# Partially rebuild the tree (cheaper than a complete rebuild)
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StockLocation.objects.partial_rebuild(tree_id)
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else:
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StockLocation.objects.rebuild()
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@staticmethod
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def get_api_url():
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return reverse('api-location-list')
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@ -159,20 +188,6 @@ class StockLocation(InvenTreeTree):
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return self.stock_item_count()
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@receiver(pre_delete, sender=StockLocation, dispatch_uid='stocklocation_delete_log')
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def before_delete_stock_location(sender, instance, using, **kwargs):
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# Update each part in the stock location
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for item in instance.stock_items.all():
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item.location = instance.parent
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item.save()
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# Update each child category
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for child in instance.children.all():
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child.parent = instance.parent
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child.save()
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class StockItemManager(TreeManager):
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"""
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Custom database manager for the StockItem class.
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@ -524,6 +524,175 @@ class StockTest(TestCase):
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# Serialize the remainder of the stock
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item.serializeStock(2, [99, 100], self.user)
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def test_location_tree(self):
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"""
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Unit tests for stock location tree structure (MPTT).
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Ensure that the MPTT structure is rebuilt correctly,
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and the corrent ancestor tree is observed.
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Ref: https://github.com/inventree/InvenTree/issues/2636
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Ref: https://github.com/inventree/InvenTree/issues/2733
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"""
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# First, we will create a stock location structure
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A = StockLocation.objects.create(
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name='A',
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description='Top level location'
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)
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B1 = StockLocation.objects.create(
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name='B1',
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parent=A
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)
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B2 = StockLocation.objects.create(
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name='B2',
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parent=A
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)
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B3 = StockLocation.objects.create(
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name='B3',
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parent=A
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)
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C11 = StockLocation.objects.create(
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name='C11',
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parent=B1,
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)
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C12 = StockLocation.objects.create(
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name='C12',
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parent=B1,
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)
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C21 = StockLocation.objects.create(
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name='C21',
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parent=B2,
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)
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C22 = StockLocation.objects.create(
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name='C22',
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parent=B2,
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)
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C31 = StockLocation.objects.create(
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name='C31',
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parent=B3,
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)
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C32 = StockLocation.objects.create(
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name='C32',
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parent=B3
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)
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# Check that the tree_id is correct for each sublocation
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for loc in [B1, B2, B3, C11, C12, C21, C22, C31, C32]:
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self.assertEqual(loc.tree_id, A.tree_id)
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# Check that the tree levels are correct for each node in the tree
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self.assertEqual(A.level, 0)
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self.assertEqual(A.get_ancestors().count(), 0)
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for loc in [B1, B2, B3]:
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self.assertEqual(loc.parent, A)
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self.assertEqual(loc.level, 1)
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self.assertEqual(loc.get_ancestors().count(), 1)
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for loc in [C11, C12]:
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self.assertEqual(loc.parent, B1)
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self.assertEqual(loc.level, 2)
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self.assertEqual(loc.get_ancestors().count(), 2)
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for loc in [C21, C22]:
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self.assertEqual(loc.parent, B2)
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self.assertEqual(loc.level, 2)
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self.assertEqual(loc.get_ancestors().count(), 2)
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for loc in [C31, C32]:
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self.assertEqual(loc.parent, B3)
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self.assertEqual(loc.level, 2)
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self.assertEqual(loc.get_ancestors().count(), 2)
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# Spot-check for C32
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ancestors = C32.get_ancestors(include_self=True)
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self.assertEqual(ancestors[0], A)
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self.assertEqual(ancestors[1], B3)
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self.assertEqual(ancestors[2], C32)
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# At this point, we are confident that the tree is correctly structured.
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# Let's delete node B3 from the tree. We expect that:
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# - C31 should move directly under A
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# - C32 should move directly under A
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# Add some stock items to B3
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for i in range(10):
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StockItem.objects.create(
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part=Part.objects.get(pk=1),
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quantity=10,
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location=B3
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)
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self.assertEqual(StockItem.objects.filter(location=B3).count(), 10)
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self.assertEqual(StockItem.objects.filter(location=A).count(), 0)
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B3.delete()
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A.refresh_from_db()
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C31.refresh_from_db()
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C32.refresh_from_db()
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# Stock items have been moved to A
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self.assertEqual(StockItem.objects.filter(location=A).count(), 10)
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# Parent should be A
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self.assertEqual(C31.parent, A)
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self.assertEqual(C32.parent, A)
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self.assertEqual(C31.tree_id, A.tree_id)
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self.assertEqual(C31.level, 1)
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self.assertEqual(C32.tree_id, A.tree_id)
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self.assertEqual(C32.level, 1)
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# Ancestor tree should be just A
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ancestors = C31.get_ancestors()
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self.assertEqual(ancestors.count(), 1)
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self.assertEqual(ancestors[0], A)
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ancestors = C32.get_ancestors()
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self.assertEqual(ancestors.count(), 1)
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self.assertEqual(ancestors[0], A)
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# Delete A
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A.delete()
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# Stock items have been moved to top-level location
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self.assertEqual(StockItem.objects.filter(location=None).count(), 10)
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for loc in [B1, B2, C11, C12, C21, C22]:
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loc.refresh_from_db()
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self.assertEqual(B1.parent, None)
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self.assertEqual(B2.parent, None)
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self.assertEqual(C11.parent, B1)
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self.assertEqual(C12.parent, B1)
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self.assertEqual(C11.get_ancestors().count(), 1)
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self.assertEqual(C12.get_ancestors().count(), 1)
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self.assertEqual(C21.parent, B2)
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self.assertEqual(C22.parent, B2)
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ancestors = C21.get_ancestors()
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print("C21 ancestors:", ancestors)
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self.assertEqual(C21.get_ancestors().count(), 1)
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self.assertEqual(C22.get_ancestors().count(), 1)
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class VariantTest(StockTest):
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"""
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