Trim arrays at the path so that it becomes subarray [start, end], both inclusive.
If the array is empty, do nothing, return 0.
If start <0, treat it as 0.
If end >= size (size of the array), treat it as size-1.
If start >= size or start > end, empty the array and return 0.
Syntax
JSON.ARRINSERT <key> <path> <start> <end>
key (required) – key of JSON document type
path (required) – a JSON path
start (required) – start index, inclusive.
end (required) – end index, inclusive.
Return
If the path is enhanced syntax:
Array of integers, representing the new length of the array at each path.
-
If a value is an empty array, its corresponding return value is null.
-
If a value is not an array, its corresponding return value is null.
-
OUTOFBOUNDARIESerror if an index argument is out of bounds.
If the path is restricted syntax:
Integer, the new length of the array.
Null if the array is empty.
-
WRONGTYPEerror if the value at the path is not an array. -
OUTOFBOUNDARIESerror if an index argument is out of bounds.
Examples
Enhanced path syntax:
127.0.0.1:6379> JSON.SET k1 . '[[], ["a"], ["a", "b"], ["a", "b", "c"]]'
OK
127.0.0.1:6379> JSON.ARRTRIM k1 $[*] 0 1
1) (integer) 0
2) (integer) 1
3) (integer) 2
4) (integer) 2
127.0.0.1:6379> JSON.GET k1
"[[],[\"a\"],[\"a\",\"b\"],[\"a\",\"b\"]]"
Restricted path syntax:
127.0.0.1:6379> JSON.SET k1 . '{"children": ["John", "Jack", "Tom", "Bob", "Mike"]}'
OK
127.0.0.1:6379> JSON.ARRTRIM k1 .children 0 1
(integer) 2
127.0.0.1:6379> JSON.GET k1 .children
"[\"John\",\"Jack\"]"
