MongoEngine / MongoEngine/mongoengine
Dict field can't handle python's Decimal
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Aggregation Framework
Bug
DecimalField
Discussion
- Dominant language
- Python
- Stars
- 4.3k
- Forks
- 1.2k
- Avg merge
- 4h 41m
- Merged PRs (30d)
- 11
Description
Attempt to save decimal.Decimal object as one of the values in DictField raises bson.errors.InvalidDocument: Cannot encode object: Decimal('20000')
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 by reproducing the failure when saving a Python Decimal inside a DictField, then trace the DictField serialization path and the BSON encoding error. Done means Decimal values can be saved without InvalidDocument while existing DictField behavior remains intact, with a regression test covering the case.
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
- Needs clarification
- Newbie friendliness
- 35/100