mongodb config_error ai_generated true

MongoServerError: Change stream pipeline must be a valid JSON array: invalid JSON input at position 10

ID: mongodb/change-stream-invalid-json

Also available as: JSON · Markdown · 中文
95%Fix Rate
90%Confidence
1Evidence
2024-04-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
MongoDB 5.0 active — — —
MongoDB 6.0 active — — —
MongoDB 7.0 active — — —

Root Cause

The change stream pipeline argument was passed as an invalid JSON string or malformed array, often due to string concatenation errors in application code.

generic

中文

变更流管道参数作为无效的 JSON 字符串或格式错误的数组传递，通常是由于应用程序代码中的字符串拼接错误。

Official Documentation

https://www.mongodb.com/docs/manual/changeStreams/

Workarounds

  1. 95% success Ensure the pipeline is passed as a native array object, not a JSON string. In Node.js: db.collection.watch([{$match: {operationType: 'insert'}}]). In Python: db.collection.watch([{'$match': {'operationType': 'insert'}}]). 
    Ensure the pipeline is passed as a native array object, not a JSON string. In Node.js: db.collection.watch([{$match: {operationType: 'insert'}}]). In Python: db.collection.watch([{'$match': {'operationType': 'insert'}}]).
  2. 90% success Validate the pipeline JSON using JSON.parse() in JavaScript or json.loads() in Python before passing it to the watch method. 
    Validate the pipeline JSON using JSON.parse() in JavaScript or json.loads() in Python before passing it to the watch method.

中文步骤

  1. 确保管道作为原生数组对象传递，而不是 JSON 字符串。在 Node.js 中：db.collection.watch([{$match: {operationType: 'insert'}}])。在 Python 中：db.collection.watch([{'$match': {'operationType': 'insert'}}])。
  2. 在将管道传递给 watch 方法之前，使用 JavaScript 中的 JSON.parse() 或 Python 中的 json.loads() 验证管道 JSON。

Dead Ends

Common approaches that don't work:

  1. 90% fail

    Adding extra quotes around the pipeline array does not fix the JSON parsing; it causes additional syntax errors.

  2. 95% fail

    Using a string instead of an array for the pipeline (e.g., '[{"$match": {}}]') is parsed as a string literal, not an array.