JSON.STRAPPEND
Appends a string to the JSON strings at the path.
Syntax
JSON.STRAPPEND <key> [path] <json_string>
key (required) – A Redis OSS key of JSON document type.
path (optional) – A JSON path. Defaults to the root if not provided.
json_string (required) – The JSON representation of a string. Note that a JSON string must be quoted. For example: '"string example"'.
Return
If the path is enhanced syntax:
Array of integers that represent the new length of the string at each path.
-
If a value at the path is not a string, its corresponding return value is null.
SYNTAXERR
error if the input json argument is not a valid JSON string.NONEXISTENT
error if the path does not exist.
If the path is restricted syntax:
Integer, the string's new length.
If multiple string values are selected, the command returns the new length of the last updated string.
-
WRONGTYPE
error if the value at the path is not a string. -
WRONGTYPE
error if the input json argument is not a valid JSON string. -
NONEXISTENT
error if the path does not exist.
Examples
Enhanced path syntax:
127.0.0.1:6379> JSON.SET k1 $ '{"a":{"a":"a"}, "b":{"a":"a", "b":1}, "c":{"a":"a", "b":"bb"}, "d":{"a":1, "b":"b", "c":3}}' OK 127.0.0.1:6379> JSON.STRAPPEND k1 $.a.a '"a"' 1) (integer) 2 127.0.0.1:6379> JSON.STRAPPEND k1 $.a.* '"a"' 1) (integer) 3 127.0.0.1:6379> JSON.STRAPPEND k1 $.b.* '"a"' 1) (integer) 2 2) (nil) 127.0.0.1:6379> JSON.STRAPPEND k1 $.c.* '"a"' 1) (integer) 2 2) (integer) 3 127.0.0.1:6379> JSON.STRAPPEND k1 $.c.b '"a"' 1) (integer) 4 127.0.0.1:6379> JSON.STRAPPEND k1 $.d.* '"a"' 1) (nil) 2) (integer) 2 3) (nil)
Restricted path syntax:
127.0.0.1:6379> JSON.SET k1 . '{"a":{"a":"a"}, "b":{"a":"a", "b":1}, "c":{"a":"a", "b":"bb"}, "d":{"a":1, "b":"b", "c":3}}' OK 127.0.0.1:6379> JSON.STRAPPEND k1 .a.a '"a"' (integer) 2 127.0.0.1:6379> JSON.STRAPPEND k1 .a.* '"a"' (integer) 3 127.0.0.1:6379> JSON.STRAPPEND k1 .b.* '"a"' (integer) 2 127.0.0.1:6379> JSON.STRAPPEND k1 .c.* '"a"' (integer) 3 127.0.0.1:6379> JSON.STRAPPEND k1 .c.b '"a"' (integer) 4 127.0.0.1:6379> JSON.STRAPPEND k1 .d.* '"a"' (integer) 2