redis type_error ai_generated true

WRONGTYPE Operation against a key holding the wrong kind of value

ID: redis/wrongtype-operation

Also available as: JSON · Markdown

92%Fix Rate

91%Confidence

3Evidence

2023-01-01First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
7	active	—	—	—

Command used on a key that holds a different data type than expected. E.g., GET on a hash key, or LPUSH on a string key.

generic

92% success Check key type before operating on it
```
redis-cli TYPE mykey  # returns string, list, set, zset, hash, stream
```
Sources: https://redis.io/docs/latest/operate/oss_and_stack/management/

90% success Fix the application code to use correct commands for the data type

String: GET/SET; Hash: HGET/HSET; List: LPUSH/LRANGE; Set: SADD/SMEMBERS; Sorted Set: ZADD/ZRANGE

85% success Use separate key names or namespacing for different data types
```
user:123:name (string), user:123:profile (hash), user:123:orders (list)
```

Common approaches that don't work:

Delete and recreate the key with the correct type 75% fail
Destroys existing data. Other parts of the application may depend on the current type.
Use RENAME to work around the type check 85% fail
RENAME does not change the type; the renamed key still has the wrong type for the operation