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

Question

Hi I am using Laravel with Redis  When I am trying to access a key by get method then get following error  WRONGTYPE Operation against a key holding the wrong kind of value   I am using following code to access the key value -  i use this code for get data from redis    values    l messages    value    redis- gt HGETALL  values   print  value

User · Answer

I faced this issue when trying to set something to redis. The problem was that I previously used "set" method to set data with a certain key, like

$redis->set('persons', $persons)

Later I decided to change to "hSet" method, and I tried it this way

foreach($persons as $person){
    $redis->hSet('persons', $person->id, $person);
}

Then I got the aforementioned error. So, what I had to do is to go to redis-cli and manually delete "persons" entry with

del persons

It simply couldn't write different data structure under existing key, so I had to delete the entry and hSet then.

User · Answer

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

User · Answer

Redis supports 5 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  lt key gt  if value is of type hash -  HGETALL  lt key gt  if value is of type lists -  lrange  lt key gt   lt start gt   lt end gt  if value is of type sets -  smembers  lt key gt  if value is of type sorted sets -  ZRANGEBYSCORE  lt key gt   lt min gt   lt max gt    Use the TYPE command to check the type of value a key is mapping to    type  lt key gt

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

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