MongoEngine / MongoEngine/mongoengine
InvalidQueryError when calling nested DynamicField
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Description
I have a model User with the field:
identities = DynamicField()
When I call the query:
user = User.objects(identities__profileData__email=email).first()
I get mongoengine.errors.InvalidQueryError: 'str' object has no attribute 'name'
So the issue here seems to be that the BaseDocument._lookup_field method seems to return strings, not fields, in some cases. There is even a TODO comment on it. I am able to do the same query using raw as workaround.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at BaseDocument._lookup_field and reproduce the User.objects(identities__profileData__email=email).first() query described in the issue. Compare its behavior with the raw workaround and trace where the nested DynamicField lookup produces a string. Done means the nested query no longer raises InvalidQueryError and has regression coverage.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- mongodb, python
- Domain
- databases
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 52/100