MSETNX

Sets the given keys to their respective values only if all the keys do not exist.

Syntax

MSETNX key value [key value ...]

Return

Integer reply:

• 1 if all keys were set successfully.
• 0 if no key was set (at least one key already exists).

Examples

redis> MSETNX key1 "Hello" key2 "World"
(integer) 1
redis> MSETNX key2 "New" key3 "Value"
(integer) 0
redis> GET key1
"Hello"
redis> EXISTS key3
(integer) 0