decrby #

Decrements the number stored at key by a provided integer value. If the key does not exist, it is set to 0 before performing the operation.

[Redis documentation]

decrby(key, value, [options], [callback]) #

Arguments	Type	Description
`key`	string	Key identifier
`value`	int	Decrement value
`options`	JSON Object	Optional parameters
`callback`	function	Callback

Options #

Option	Type	Description	Default
`queuable`	boolean	Make this request queuable or not	`true`

Return Value #

Returns the MemoryStorage object to allow chaining.

Callback Response #

Returns an integer containing the updated key value.

Usage #

// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.decrby('key', 42, function (err, value) {
  // callback called once the action has completed
});
// Using promises (NodeJS only)
kuzzle.memoryStorage.decrbyPromise('key', 42)
  .then(value => {
    // resolved once the action has completed
  });

Callback response: