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JSON.OBJLEN

JSON.OBJLEN
Syntax
JSON.OBJLEN key [path]
Available in:
Redis Stack / JSON 1.0.0
Time complexity:
O(1) when path is evaluated to a single value, O(N) when path is evaluated to multiple values, where N is the size of the key

Report the number of keys in the JSON object at path in key

Examples

Required arguments

key

is key to parse. Returns null for nonexistent keys.

Optional arguments

path

is JSONPath to specify. Default is root $. Returns null for nonexistant path.

Return

JSON.OBJLEN returns an array of integer replies for each path specified as the number of keys in the object or nil, if the matching JSON value is not an object. For more information about replies, see Redis serialization protocol specification.

Examples

127.0.0.1:6379> JSON.SET doc $ '{"a":[3], "nested": {"a": {"b":2, "c": 1}}}'
OK
127.0.0.1:6379> JSON.OBJLEN doc $..a
1) (nil)
2) (integer) 2

See also

JSON.ARRINDEX | JSON.ARRINSERT

© 2006–2022 Salvatore Sanfilippo
Licensed under the Creative Commons Attribution-ShareAlike License 4.0.
https://redis.io/commands/json.objlen/