RedisJSON2 (RedisJSON nextgen) is a Redis module that implements ECMA-404 The JSON Data Interchange Standard as a native data type. It allows storing, updating and fetching JSON values from Redis keys (documents).
- Full support of the JSON standard
- JSONPath syntax for selecting elements inside documents
- Documents are stored as binary data in a tree structure, allowing fast access to sub-elements
- Typed atomic operations for all JSON values types
- Secondary index support based on RediSearch
docker run -p 6379:6379 --name redis-redisjson redislabs/redisjson2:latest
JSON.INDEX ADD <index> <field> <path>
JSON.QGET <index> <query> <path>
JSON.QSET <index> <query> <path> <json> [NX | XX]
JSON.QDEL <index> <query> <path>
JSON.INDEX DEL <index> <field>
JSON.INDEX INFO <index> <field>
Return value from JSON.QGET is an array of keys and values:
key
json
key
json
In a language such as Java this could be represented as a Map<String, Document>.
A query combining multiple paths:
JSON.QGET mytype "@path1:hello @path2:world" d.name
127.0.0.1:6379> json.set user1 $ '{"last":"Joe", "first":"Mc"}' INDEX person
OK
127.0.0.1:6379> json.set user2 $ '{"last":"Joan", "first":"Mc"}' INDEX person
OK
127.0.0.1:6379> json.index add person last $.last
OK
127.0.0.1:6379> JSON.QGET person Jo*
"{\"user2\":[{\"last\":\"Joan\",\"first\":\"Mc\"}],\"user1\":[{\"last\":\"Joe\",\"first\":\"Mc\"}]}"
127.0.0.1:6379> json.set user3 $ '{"last":"Joel", "first":"Dan"}' INDEX person
OK
127.0.0.1:6379> JSON.QGET person Jo*
"{\"user2\":[{\"last\":\"Joan\",\"first\":\"Mc\"}],\"user1\":[{\"last\":\"Joe\",\"first\":\"Mc\"}],\"user3\":[{\"last\":\"Joel\",\"first\":\"Dan\"}]}"
127.0.0.1:6379> json.index add person first $.first
OK
127.0.0.1:6379> JSON.QGET person Mc
"{\"user2\":[{\"last\":\"Joan\",\"first\":\"Mc\"}],\"user1\":[{\"last\":\"Joe\",\"first\":\"Mc\"}]}"
127.0.0.1:6379> JSON.QGET person Mc $.last
"{\"user2\":[\"Joan\"],\"user1\":[\"Joe\"]}"cargo build --releaseredis-server --loadmodule ./target/release/libredisjson.so