python data_error ai_generated true

sqlalchemy.exc.DataError: (psycopg2.errors.StringDataRightTruncation) value too long for type character varying(50)

ID: python/sqlalchemy-exc-data-error-value-too-long

Also available as: JSON · Markdown · 中文
80%Fix Rate
81%Confidence
0Evidence
2024-10-02First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

Inserting a string that exceeds the maximum length defined in the database column (VARCHAR limit).

generic

中文

插入的字符串超过了数据库列定义的最大长度（VARCHAR 限制）。

Workarounds

  1. 90% success Alter column to larger size 
    Increase the column length via migration, e.g., ALTER TABLE users ALTER COLUMN name TYPE VARCHAR(100);
  2. 85% success Add input length validation 
    Validate input length in application code before insertion, e.g., if len(name) > 50: raise ValueError.

Dead Ends

Common approaches that don't work:

  1. Manually truncating the string 60% fail

  2. Retrying without modification 90% fail