[QUESTION] How I can use FastAPI with MongoDB libraries?

First check

• I used the GitHub search to find a similar issue and didn’t find it.
• I searched the FastAPI documentation, with the integrated search.
• I already searched in Google “How to X in FastAPI” and didn’t find any information.

Description

How can I use MongoDB using libraries such a pymongo or MongoEngine? I tried to create a basic project with pymongo, but when I try to return MongoDB entity using .find_one() for example, I got an error that ... ObjectId does not iterable.... Then I tried MongoEngine, but when I return for example Article.objects, it just returns "_cls": "".

Is it possible to use MongoDB in FastAPI or I can use only SQLAlchemy?

Additional context

I also found similar issues in a repo and some answers on StackOverflow but doesn’t found how to return MongoDB entities in fastapi responses.

[chris-allnutt]

Have you tried using the json utils described above https://api.mongodb.com/python/current/api/bson/json_util.html I truly think that’s the solution to your problem. You need a serializer that understands mongo objects, that serializer does.

[tiangolo]

Thanks for the help here everyone! 👏 🙇

I assume you solved your problem, so thanks for reporting back and closing the issue @KirillSaltykov 👍