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Pricing bug fix (#4422)

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* Control when a new PartPricing object can be created

- Prevent this when calling from an on_delete signal
- There is an edge case where deleting a part triggers a series of on_delete signals inside an atomic transaction
- When the new PartPricing object is created,

* Add unit testing:

- Ensure PartPricing gets created when a new StockItem is added
- Part.delete() works without error
- PartPricing instances are deleted also

* style fixes
This commit is contained in:
Oliver 2023-02-26 16:36:11 +11:00 committed by GitHub
parent 0c5dc2865c
commit b657fb4405
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7 changed files with 72 additions and 15 deletions
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2
InvenTree/company/migrations/0026_auto_20201110_1011.py
View File

@ -23,7 +23,7 @@ def migrate_currencies(apps, schema_editor):
for the SupplierPriceBreak model, to a new django-money compatible currency.
"""
logger.info("Updating currency references for SupplierPriceBreak model...")
logger.debug("Updating currency references for SupplierPriceBreak model...")
# A list of available currency codes
currency_codes = CURRENCIES.keys()

4
InvenTree/company/models.py
View File

@ -722,7 +722,7 @@ def after_save_supplier_price(sender, instance, created, **kwargs):
if InvenTree.ready.canAppAccessDatabase() and not InvenTree.ready.isImportingData():
if instance.part and instance.part.part:
instance.part.part.schedule_pricing_update()
instance.part.part.schedule_pricing_update(create=True)
@receiver(post_delete, sender=SupplierPriceBreak, dispatch_uid='post_delete_supplier_price_break')
@ -732,4 +732,4 @@ def after_delete_supplier_price(sender, instance, **kwargs):
if InvenTree.ready.canAppAccessDatabase() and not InvenTree.ready.isImportingData():
if instance.part and instance.part.part:
instance.part.part.schedule_pricing_update()
instance.part.part.schedule_pricing_update(create=False)

4
InvenTree/order/models.py
View File

@ -389,7 +389,7 @@ class PurchaseOrder(Order):
# Schedule pricing update for any referenced parts
for line in self.lines.all():
if line.part and line.part.part:
line.part.part.schedule_pricing_update()
line.part.part.schedule_pricing_update(create=True)
trigger_event('purchaseorder.completed', id=self.pk)
@ -782,7 +782,7 @@ class SalesOrder(Order):
# Schedule pricing update for any referenced parts
for line in self.lines.all():
line.part.schedule_pricing_update()
line.part.schedule_pricing_update(create=True)
trigger_event('salesorder.completed', id=self.pk)

2
InvenTree/part/migrations/0056_auto_20201110_1125.py
View File

@ -24,7 +24,7 @@ def migrate_currencies(apps, schema_editor):
for the SupplierPriceBreak model, to a new django-money compatible currency.
"""
logger.info("Updating currency references for SupplierPriceBreak model...")
logger.debug("Updating currency references for SupplierPriceBreak model...")
# A list of available currency codes
currency_codes = CURRENCIES.keys()

30
InvenTree/part/models.py
View File

@ -1678,17 +1678,33 @@ class Part(InvenTreeBarcodeMixin, MetadataMixin, MPTTModel):
return pricing
def schedule_pricing_update(self):
def schedule_pricing_update(self, create: bool = False):
"""Helper function to schedule a pricing update.
Importantly, catches any errors which may occur during deletion of related objects,
in particular due to post_delete signals.
Ref: https://github.com/inventree/InvenTree/pull/3986
Arguments:
create: Whether or not a new PartPricing object should be created if it does not already exist
"""
pricing = self.pricing
pricing.schedule_for_update()
try:
self.refresh_from_db()
except Part.DoesNotExist:
return
try:
pricing = self.pricing
if create or pricing.pk:
pricing.schedule_for_update()
except IntegrityError:
# If this part instance has been deleted,
# some post-delete or post-save signals may still be fired
# which can cause issues down the track
pass
def get_price_info(self, quantity=1, buy=True, bom=True, internal=False):
"""Return a simplified pricing string for this part.
@ -2261,6 +2277,10 @@ class PartPricing(common.models.MetaMixin):
def schedule_for_update(self, counter: int = 0):
"""Schedule this pricing to be updated"""
if not self.part or not self.part.pk or not Part.objects.filter(pk=self.part.pk).exists():
logger.warning("Referenced part instance does not exist - skipping pricing update.")
return
try:
if self.pk:
self.refresh_from_db()
@ -3710,7 +3730,7 @@ def update_pricing_after_edit(sender, instance, created, **kwargs):
# Update part pricing *unless* we are importing data
if InvenTree.ready.canAppAccessDatabase() and not InvenTree.ready.isImportingData():
instance.part.schedule_pricing_update()
instance.part.schedule_pricing_update(create=True)
@receiver(post_delete, sender=BomItem, dispatch_uid='post_delete_bom_item')
@ -3721,7 +3741,7 @@ def update_pricing_after_delete(sender, instance, **kwargs):
# Update part pricing *unless* we are importing data
if InvenTree.ready.canAppAccessDatabase() and not InvenTree.ready.isImportingData():
instance.part.schedule_pricing_update()
instance.part.schedule_pricing_update(create=False)
class BomItemSubstitute(models.Model):

37
InvenTree/part/test_pricing.py
View File

@ -448,3 +448,40 @@ class PartPricingTests(InvenTreeTestCase):
from django_q.models import OrmQ
self.assertEqual(OrmQ.objects.count(), 101)
def test_delete_part_with_stock_items(self):
"""Test deleting a part instance with stock items.
This is to test a specific edge condition which was discovered that caused an IntegrityError.
Ref: https://github.com/inventree/InvenTree/issues/4419
Essentially a series of on_delete listeners caused a new PartPricing object to be created,
but it pointed to a Part instance which was slated to be deleted inside an atomic transaction.
"""
p = part.models.Part.objects.create(
name="my part",
description="my part description",
active=False,
)
# Create some stock items
for _idx in range(3):
stock.models.StockItem.objects.create(
part=p,
quantity=10,
purchase_price=Money(10, 'USD')
)
# Check that a PartPricing object exists
self.assertTrue(part.models.PartPricing.objects.filter(part=p).exists())
# Delete the part
p.delete()
# Check that the PartPricing object has been deleted
self.assertFalse(part.models.PartPricing.objects.filter(part=p).exists())
# Try to update pricing (should fail gracefully as the Part has been deleted)
p.schedule_pricing_update(create=False)
self.assertFalse(part.models.PartPricing.objects.filter(part=p).exists())

8
InvenTree/stock/models.py
View File

@ -2004,8 +2004,8 @@ def after_delete_stock_item(sender, instance: StockItem, **kwargs):
InvenTree.tasks.offload_task(part_tasks.notify_low_stock_if_required, instance.part)
# Schedule an update on parent part pricing
if InvenTree.ready.canAppAccessDatabase():
instance.part.schedule_pricing_update()
if InvenTree.ready.canAppAccessDatabase(allow_test=True):
instance.part.schedule_pricing_update(create=False)
@receiver(post_save, sender=StockItem, dispatch_uid='stock_item_post_save_log')
@ -2017,8 +2017,8 @@ def after_save_stock_item(sender, instance: StockItem, created, **kwargs):
# Run this check in the background
InvenTree.tasks.offload_task(part_tasks.notify_low_stock_if_required, instance.part)
if InvenTree.ready.canAppAccessDatabase():
instance.part.schedule_pricing_update()
if InvenTree.ready.canAppAccessDatabase(allow_test=True):
instance.part.schedule_pricing_update(create=True)
class StockItemAttachment(InvenTreeAttachment):