Скачать или смотреть How to Resolve unknown operator: $jsonSchema Error in Pymongo Collection Creation

Learn how to fix the `unknown operator: $jsonSchema` error while creating collections with validators in pymongo. Simplified explanations and examples provided.
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This video is based on the question https://stackoverflow.com/q/71058086/ asked by the user 'vinalti' ( https://stackoverflow.com/u/17965313/ ) and on the answer https://stackoverflow.com/a/71073220/ provided by the user 'vinalti' ( https://stackoverflow.com/u/17965313/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

If you're working with MongoDB and using the pymongo library, you may encounter an error when trying to set up a collection with a validator that includes a JSON schema. Specifically, you might see an error message stating unknown operator: $jsonSchema. This issue can be frustrating, especially when you want to ensure your data adheres to a specific format.

In this guide, we'll explore the root cause of this problem and provide a straightforward solution to resolve the unknown operator: $jsonSchema error. Let's dive into the details!

Understanding the Problem

When you attempt to create a new collection in MongoDB with a validator using pymongo, you expect the operation to succeed, as you are following the schema defined in your JSON file. Here’s what your code might look like:

[[See Video to Reveal this Text or Code Snippet]]

However, if you see the following error:

[[See Video to Reveal this Text or Code Snippet]]

it means that something is off in your syntax, particularly in the way the validator is structured.

Solution: Fixing the Syntax Error

The crux of the issue lies in how you pass the validator argument to the create_collection method. After investigating, here's the simple yet effective solution:

The Bad vs. the Good Version

Bad Version

The incorrect format that causes the problem looks like this:

[[See Video to Reveal this Text or Code Snippet]]

Good Version

The correct way to create the collection with the validator is as follows:

[[See Video to Reveal this Text or Code Snippet]]

Key Takeaway

Remove the "validator" key: When passing the validator as an argument, you do not need to wrap the $jsonSchema in a "validator" parameter. Simply use it directly.

Conclusion

By correcting this small syntax issue, you’ll be able to create your MongoDB collection without encountering the unknown operator: $jsonSchema error. Proper documentation for pymongo usage can sometimes be scarce, so it's important to double-check your syntax to avoid common pitfalls.

If you found this guide helpful or have any further questions, don’t hesitate to reach out! Happy coding and working with MongoDB!