JSON.ARRLEN key [path]
@json,
@read,
@slow,
Report the length of the JSON array at path in key
keyis key to parse.
pathis JSONPath to specify. Default is root $, if not provided. Returns null if the key or path do not exist.
Create a document for wireless earbuds.
redis> JSON.SET item:2 $ '{"name":"Wireless earbuds","description":"Wireless Bluetooth in-ear headphones","connection":{"wireless":true,"type":"Bluetooth"},"price":64.99,"stock":17,"colors":["black","white"], "max_level":[80, 100, 120]}'
OKFind lengths of arrays in all objects of the document.
redis> JSON.ARRLEN item:2 '$.[*]'
1) (nil)
2) (nil)
3) (nil)
4) (nil)
5) (nil)
6) (integer) 2
7) (integer) 3Return the length of the max_level array.
redis> JSON.ARRLEN item:2 '$..max_level'
1) (integer) 3Get all the maximum level values.
redis> JSON.GET item:2 '$..max_level'
"[[80,100,120]]"With $-based path argument: Array reply of integer replies or null replies, where each element is the array length, or null if the matching value is not an array.
With .-based path argument: Integer reply representing the array length, or null reply if the matching value is not an array.
JSON.ARRINDEX | JSON.ARRINSERT