Promisify Redis 客户端

Question

我怎样才能 promisify redis 才能使用 then？

我已尝试向客户承诺：

var redis = require('redis');
Promise.promisifyAll(redis.RedisClient.prototype);
var client  = redis.createClient();

client.on('connect', function(){
    console.log('Redis connection is up');

    client.lrange('abc',0,3).then(function(result){
        console.log(result);
        res.send(200)
    });
});

但它响应错误：

client.lrange(...).then is not a function

PS: 回调代码工作正常，所以这意味着服务器运行完美。

Answer 1

当使用 promisifyAll 时，promisified 方法得到一个 -Async 后缀：

client.lrangeAsync('abc',0,3).then(...);

根据the documentation：

Note that the original methods on the object are not overwritten but new methods are created with the Async-suffix. For example, if you promisifyAll the node.js fs object use fs.statAsync to call the promisified stat method.

Promisify Redis 客户端

Promisify Redis client

javascript

redis

node.js

promise

bluebird