Redis Linsert Command

Redis Lists (List)

The Redis Linsert command is used to insert elements before or after the elements of the list. No operation is performed if the specified element does not exist in the list.

If the list does not exist, it is considered an empty list and no operation is performed.

If the key is not of list type, return an error.

Syntax

The basic syntax of the redis Linsert command is as follows:

LINSERT key BEFORE|AFTER pivot value

Insert the value value into the list key, before or after the value pivot.

Available Version

>= 1.0.0

Return Value

If the command executes successfully, return the length of the list after the insertion operation. If the specified element is not found, return -1 . If the key does not exist or is an empty list, return 0.

Online Examples

redis> RPUSH mylist "Hello"
(integer) 1
redis> RPUSH mylist "World"
(integer) 2
redis> LINSERT mylist BEFORE "World" "There"
(integer) 3
redis> LRANGE mylist 0 -1
1) "Hello"
2) "There"
3) "World"
redis> 

Redis Lists (List)