JSON.STRAPPEND

Append a string to the JSON strings at the path.

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

RESP2 Reply

• If the path is enhanced syntax:

  • Array reply: Array of integers representing the new length of the string at each path.

  • Nil reply: For each path where the value is not a string.

• If the path is restricted syntax:

  • Integer reply: The string's new length.

  • Integer reply: If multiple string values are selected, returns the new length of the last updated string.

• Simple error reply:

  • if the input json argument is not a valid JSON string.

  • if the path does not exist.

  • if the value at the path is not a string (only for restricted syntax).

RESP3 Reply

• If the path is enhanced syntax:

  • Array reply: Array of integers representing the new length of the string at each path.

  • Null reply: For each path where the value is not a string.

• If the path is restricted syntax:

  • Integer reply: The string's new length.

  • Integer reply: If multiple string values are selected, returns the new length of the last updated string.

• Simple error reply:

  • if the input json argument is not a valid JSON string.

  • if the path does not exist.

  • if the value at the path is not a string (only for restricted syntax).