python data_error ai_generated true

pydantic.errors.JsonError: Invalid JSON

ID: python/pydantic-json-load-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
82%Confidence
0Evidence
2024-05-12First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
2.x active — — —

Root Cause

When using Json type, the input string is not valid JSON, causing parsing failure.

generic

中文

使用 Json 类型时，输入字符串不是有效的 JSON，导致解析失败。

Workarounds

  1. 90% success 
    Use Json type: data: Json
  2. 85% success 
    Validate with custom validator: @field_validator('data') def check_json(cls, v): json.loads(v); return v

Dead Ends

Common approaches that don't work:

  1. 60% fail

    If input is already a dict, json.loads fails; Pydantic expects string.

  2. 80% fail

    Empty string is not valid JSON.