JSON.STRLEN

Get lengths of the JSON string values 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.STRLEN k1 $.a.a
1) (integer) 1
127.0.0.1:6379> JSON.STRLEN k1 $.a.*
1) (integer) 1
127.0.0.1:6379> JSON.STRLEN k1 $.c.*
1) (integer) 1
2) (integer) 2
127.0.0.1:6379> JSON.STRLEN k1 $.c.b
1) (integer) 2
127.0.0.1:6379> JSON.STRLEN k1 $.d.*
1) (nil)
2) (integer) 1
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.STRLEN k1 .a.a
(integer) 1
127.0.0.1:6379> JSON.STRLEN k1 .a.*
(integer) 1
127.0.0.1:6379> JSON.STRLEN k1 .c.*
(integer) 1
127.0.0.1:6379> JSON.STRLEN k1 .c.b
(integer) 2
127.0.0.1:6379> JSON.STRLEN k1 .d.*
(integer) 1

RESP2 Reply

• If the path is enhanced syntax:

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

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

  • Nil reply: If the document key does not exist.

• If the path is restricted syntax:

  • Integer reply: The string's length.

  • Integer reply: If multiple string values are selected, returns the first string's length.

  • Nil reply: If the document key does not exist.

• Simple error reply:

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

  • if the path does not exist (only for restricted syntax).

RESP3 Reply

• If the path is enhanced syntax:

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

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

  • Null reply: If the document key does not exist.

• If the path is restricted syntax:

  • Integer reply: The string's length.

  • Integer reply: If multiple string values are selected, returns the first string's length.

  • Null reply: If the document key does not exist.

• Simple error reply:

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

  • if the path does not exist (only for restricted syntax).