WRONGTYPE Operation against a key holding the wrong kind of value php

This error says that you are trying to push a wrong value into the key, which means that there already exists same key but with different data structure.

To get all the keys do this in the redis cli

keys *

This should display all the keys Now to get the type of value the key stores, do

type <key>

so it says what value you can push into the key. In my case the type was string (using set) and i was trying to use the key as list


Redis supports 6 data types. You need to know what type of value that a key maps to, as for each data type, the command to retrieve it is different.

Here are the commands to retrieve key value:

  • if value is of type string -> GET <key>
  • if value is of type hash -> HGETALL <key>
  • if value is of type lists -> lrange <key> <start> <end>
  • if value is of type sets -> smembers <key>
  • if value is of type sorted sets -> ZRANGEBYSCORE <key> <min> <max>
  • if value is of type stream -> xread count <count> streams <key> <ID>. https://redis.io/commands/xread

Use the TYPE command to check the type of value a key is mapping to:

  • type <key>

This error means that the value indexed by the key "l_messages" is not of type hash, but rather something else. You've probably set it to that other value earlier in your code. Try various other value-getter commands, starting with GET, to see which one works and you'll know what type is actually here.

Tags:

Php

Redis

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