Handles Redis JSON commands: JSON.SET, JSON.GET, JSON.DEL, JSON.NUMINCRBY, JSON.TYPE, JSON.STRLEN, JSON.OBJKEYS, JSON.OBJLEN, JSON.ARRAPPEND, JSON.ARRLEN, JSON.TOGGLE, JSON.CLEAR, JSON.MGET.

Starting with Redis 8, JSON is part of Redis Open Source. FerricStore v1 stores JSON as raw bytes in Bitcask using a type tag: :erlang.term_to_binary({:json, json_string}). Every JSON.GET deserializes and evaluates JSONPath. Every JSON.SET reads, applies mutation, writes back.

JSONPath subset (v1)

• $ -- root
• $.field -- object field access
• $.field.subfield -- nested access
• $[0], $[1] -- array index
• $.field[0].name -- mixed access

Supported commands

• JSON.SET key path value [NX|XX] -- set JSON value at path
• JSON.GET key [path ...] -- get JSON value(s) at path(s)
• JSON.DEL key [path] -- delete value at path, returns count deleted
• JSON.NUMINCRBY key path value -- increment number at path
• JSON.TYPE key [path] -- return JSON type at path
• JSON.STRLEN key [path] -- return string length at path
• JSON.OBJKEYS key [path] -- return object keys at path
• JSON.OBJLEN key [path] -- return number of keys in object at path
• JSON.ARRAPPEND key path value [value ...] -- append to array at path
• JSON.ARRLEN key [path] -- return array length at path
• JSON.TOGGLE key path -- toggle boolean at path
• JSON.CLEAR key [path] -- clear container or number to zero
• JSON.MGET key [key ...] path -- get value at path from multiple keys