zadd #

Adds elements to a sorted set.

If the key does not exist, it is created, holding an empty sorted set.

If the key already exists but does not hold a sorted set, an error is returned.

If a member to insert is already in the sorted set, its score is updated and the member is reinserted at the right position in the set.

[Redis documentation]

Arguments #

zadd(key, elements, [options]);

Arguments	Type	Description
`key`	string	Sorted set key
`elements`	object[]	Elements to add
`options`	object	Optional query arguments

elements #

The elements array lists the elements to add to the sorted set. Each element object has the following properties:

Properties	Type	Description
`member`	string	Member value
`score`	string	Member score

options #

The options arguments can contain the following option properties:

Property	Type (default)	Description
`ch`	boolean (false)	If true, instead of returning the number of added elements, returns the number of changes performed
`incr`	boolean (false)	If true, instead of adding elements, increments the existing member with the provided `score`. Only one element can be specified if this option is set
`nx`	boolean (false)	If true, only adds new elements, without altering existing ones
`queuable`	boolean (true)	If true, queues the request during downtime, until connected to Kuzzle again
`xx`	boolean (false)	If true, ignores new elements, alters only existing ones

Resolve #

Resolves to the number of added elements or, if the ch option is set, resolves to the number of changes performed.

Usage #

try {
  await kuzzle.ms.zadd('ssetfoo', [
    {member: 'foo', score: '42'},
    {member: 'bar', score: '4'},
    {member: 'baz', score: '-272.15'}
  ]);
  // Prints:
  // [ { member: 'baz', score: -272.15 },
  //   { member: 'bar', score: 4 },
  //   { member: 'foo', score: 42 } ]
  console.log(await kuzzle.ms.zrange('ssetfoo', 0, -1));
} catch (error) {
  console.error(error.message);
}

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