Update Existing Records Safely
Mutate fields and flush changes correctly.
The U in CRUD
Updating means changing an existing row, not making a new one. The trick is to load the record first, then edit it. ✏️
Find Before You Change
Always fetch the target row by its id before touching it. get_or_404() loads it or stops with a clean 404.
user = User.query.get_or_404(user_id)All lessons in this course
- Create Records and Commit Sessions
- Read One and Read Many Endpoints
- Update Existing Records Safely
- Delete and Handle Missing Rows