javascript - Promisify Redis 客户端

Question

我如何promisify redis 以便我可以使用then？

我已尝试向客户 promise :

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)
    });
});

但它返回错误:

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

PS:回调代码正常，说明服务器运行正常。

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.