Sample data, not from a customer

This is what Bugsly shows when your app throws

A hand-written example of one captured error in a FastAPI service: the stack trace with the failing line, the steps that led up to it, the release and environment, and a plain-English cause with a suggested fix. Nothing on this page is live: no AI call is made and no signup is needed.

errorapi / production / release api@2.14.0

AttributeError: 'NoneType' object has no attribute 'email'

GET /api/v1/orders/{order_id}/summary · app/api/orders.py in get_order_summary

Stack trace

AttributeError: 'NoneType' object has no attribute 'email'

37async def get_order_summary(order_id: int, db: AsyncSession = Depends(get_db)):
38    order = await db.get(Order, order_id, options=[selectinload(Order.customer)])
39    if order is None:
40        raise HTTPException(status_code=404, detail="Order not found")
41    return {"id": order.id, "owner": order.customer.email, "total": order.total}

The frame in your own code (“in app”) is expanded first; library frames are collapsed.

Breadcrumbs

  1. httpPOST /api/v1/checkout 20009:14:02 UTC
  2. consoleorder 8812 created for guest checkout (customer_id=NULL)09:14:02 UTC
  3. httpGET /api/v1/orders/8812/summary09:14:09 UTC
  4. consoleSELECT orders.* FROM orders WHERE orders.id = 881209:14:09 UTC
  5. consoleAttributeError: 'NoneType' object has no attribute 'email'09:14:09 UTC

AI analysis

Example output, pre-written. Not generated live.

What it means

The code read .email on order.customer, but order.customer is None, so Python can't look up an attribute on it.

Likely cause

In get_order_summary (orders.py:41) the order was loaded fine, but its customer relationship is empty. That usually means the order's customer_id is NULL or points at a customer row that was deleted (for example a guest checkout or a soft-deleted account), so the ORM returns None instead of a Customer.

Suggested fix

Decide what a customer-less order should return, then handle it explicitly:

owner = order.customer.email if order.customer else None
return {"id": order.id, "owner": owner, "total": order.total}

If every order must have a customer, fix the data (or add a NOT NULL foreign key) instead of hiding the None.

Tags

environmentproduction
releaseapi@2.14.0
runtimeCPython 3.12.4
frameworkFastAPI 0.115
transactionGET /api/v1/orders/{order_id}/summary
server_nameapi-2

Tags and release come from your SDK config.

Get this for your own app

The free plan includes 100 issues per month, 7-day retention, 1 user, 10 AI analyses per month.

Sign up for the free plan

Try it on your own stack trace

Paste an error into the free explainer to get the same kind of plain-English answer. No signup.

Explain my error