index (
    pageSize optional default 20,
    pageNum optional default 1,
    json optional
    ) {
    special json: {
        key: $ex //exists
        key: $nex //not exists
        key: $revalue //模糊查询,例:$re^te te开头的value
    }
    return dict list json
}
show (id required) {
    return dict json
}
save (json required) {
    return saved dict json with id
}
update (id required, json required) {
    json {
        $set: {k,v...},
        $unset: [k1,k2...],
        $rename: {k,newK...}
    }
   return {result : true or false}
}
delete (id required) {
    return {result: true or false}
}






@Deprecated
dict (key-value pairs) {
    return dict list json
}
dictList (int pageNum default 0, int pageSize default 20) {
    return dict list json
}
addDict (String name required, key-value pairs) {
    return dict json
}
updateDict (String id required, String action optional, String[] keys optional) {
    if (actions === 'unset') {
        删除指定id的dict的指定key
        return {result: true or false}
    } else {
        覆盖指定id的dict的指定key的对应value
        return {result: true or false}
    }
}
deleteDict (String id required) {
    return return {result: true or false}
}