JSON.MGET - Amazon MemoryDB

JSON.MGET

Get serialized JSONs at the path from multiple document keys. Return null for non-existent key or JSON path.

Syntax

JSON.MGET <key> [key ...] <path>

  • key (required) – One or more keys of document type.

  • path (required) – a JSON path

Return

  • Array of Bulk Strings. The size of the array is equal to the number of keys in the command. Each element of the array is populated with either (a) the serialized JSON as located by the path or (b) Null if the key does not exist or the path does not exist in the document or the path is invalid (syntax error).

  • If any of the specified keys exists and is not a JSON key, the command returns WRONGTYPE error.

Examples

Enhanced path syntax:

127.0.0.1:6379> JSON.SET k1 . '{"address":{"street":"21 2nd Street","city":"New York","state":"NY","zipcode":"10021"}}'
OK
127.0.0.1:6379> JSON.SET k2 . '{"address":{"street":"5 main Street","city":"Boston","state":"MA","zipcode":"02101"}}'
OK
127.0.0.1:6379> JSON.SET k3 . '{"address":{"street":"100 Park Ave","city":"Seattle","state":"WA","zipcode":"98102"}}'
OK
127.0.0.1:6379> JSON.MGET k1 k2 k3 $.address.city
1) "[\"New York\"]"
2) "[\"Boston\"]"
3) "[\"Seattle\"]"

Restricted path syntax:

127.0.0.1:6379> JSON.SET k1 . '{"address":{"street":"21 2nd Street","city":"New York","state":"NY","zipcode":"10021"}}'
OK
127.0.0.1:6379> JSON.SET k2 . '{"address":{"street":"5 main Street","city":"Boston","state":"MA","zipcode":"02101"}}'
OK
127.0.0.1:6379> JSON.SET k3 . '{"address":{"street":"100 Park Ave","city":"Seattle","state":"WA","zipcode":"98102"}}'
OK

127.0.0.1:6379> JSON.MGET k1 k2 k3 .address.city
1) "\"New York\""
2) "\"Seattle\""
3) "\"Seattle\""