Core 2.x

exists

Checks if the specified keys exist in the database.

[Redis documentation]

Arguments

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exists(keys, [options]);

Arguments Type Description
keys
string[]
Keys to check for existence
options
object
Optional query arguments

options

The options arguments can contain the following option properties:

Property Type (default) Description
queuable
boolean (true)
If true, queues the request during downtime, until connected to Kuzzle again

Resolve

Resolves to the number of existing keys.

Usage

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try {
  // Prints: 0
  console.log(await kuzzle.ms.exists(['foo']));
  await kuzzle.ms.set('foo', 'bar');
  // Prints: 1
  console.log(await kuzzle.ms.exists(['foo']));
  console.log('Success');
} catch (error) {
  console.error(error.message);
}