以交互方式進行操作並且它可以正常工作。以編程方式執行相同的操作，並且失敗。 Redis，heroku，節點

Question

這是我的互動會話。它效果很好。

ec2-54-83-60-31.compute-1.amazonaws.com:11729> keys * 
1) testkey 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> flushall 
OK 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> keys * 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> watch testkey 
OK 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> multi 
OK 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> set testkey testvalue 
QUEUED 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> exec 
1) OK 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> keys * 
1) testkey 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> get testkey 
testvalue 
ec2-54-83-60-31.compute-1.amazonaws.com:11729> 

這是我的代碼，以及它的執行方式。

var redis = require('redis'); 
var rdsclt = redis.createClient(process.env.REDIS_URL); 
console.log('Before test block.'); 
console.log('rdsclt.flushall();'); 
rdsclt.flushall(); 
console.log('rdsclt.watch(\'testkey\');'); 
rdsclt.watch('testkey'); 
console.log('rdsclt.multi();'); 
rdsclt.multi(); 
console.log('rdsclt.set(\'testkey\', \'testvalue\');'); 
rdsclt.set('testkey', 'testvalue'); 
console.log('rdsclt.exec((error, results) => {'); 
rdsclt.exec((error, results) => { 
    console.log('Inside test block exec callback.'); 
    console.log('error =', JSON.stringify(error)); 
    console.log('results =', JSON.stringify(results)); 
}); 
console.log('After test block.'); 
return 0; // Hopefully, indicates success, in Unix. 

2016-11-07T19:39:20.038712+00:00 heroku[web.1]: Starting process with command `npm start` 
2016-11-07T19:39:22.685896+00:00 app[web.1]: 
2016-11-07T19:39:22.685912+00:00 app[web.1]: > cubsredistest@1.0.0 start /app 
2016-11-07T19:39:22.685913+00:00 app[web.1]: > node main.js 
2016-11-07T19:39:22.685914+00:00 app[web.1]: 
2016-11-07T19:39:22.918869+00:00 app[web.1]: Before test block. 
2016-11-07T19:39:22.919519+00:00 app[web.1]: rdsclt.flushall(); 
2016-11-07T19:39:22.920435+00:00 app[web.1]: rdsclt.watch('testkey'); 
2016-11-07T19:39:22.920662+00:00 app[web.1]: rdsclt.multi(); 
2016-11-07T19:39:22.920903+00:00 app[web.1]: rdsclt.set('testkey', 'testvalue'); 
2016-11-07T19:39:22.920959+00:00 app[web.1]: rdsclt.exec((error, results) => { 
2016-11-07T19:39:22.921021+00:00 app[web.1]: After test block. 
2016-11-07T19:39:22.937915+00:00 app[web.1]: Inside test block exec callback. 
2016-11-07T19:39:22.938011+00:00 app[web.1]: error = {"command":"EXEC","code":"ERR"} 
2016-11-07T19:39:22.938287+00:00 app[web.1]: results = undefined 
2016-11-07T19:39:00+00:00 app[heroku-redis]: source=REDIS sample#active-connections=1 sample#load-avg-1m=0.09 sample#load-avg-5m=0.13 sample#load-avg-15m=0.1 sample#read-iops=0 sample#write-iops=0 sample#memory-total=15664468.0kB sample#memory-free=13536884.0kB sample#memory-cached=694560kB sample#memory-redis=289016bytes sample#hit-rate=1 sample#evicted-keys=0 

我會說這兩個應該產生相同的結果，但他們沒有。我正在使用使用npm install redis安裝的redis客戶端。我知道還有其他客戶。

有人知道發生了什麼嗎？

---

我將節點客戶端從node_redis更改爲ioredis。 從npm install redis更改爲npm install ioredis。 現在錯誤信息更豐富。

2016-11-07T20:28:02.704282+00:00 app[web.1]: Inside test block exec callback. 
2016-11-07T20:28:02.704615+00:00 app[web.1]: error = {"name":"ReplyError","message":"ERR EXEC without MULTI","command":{"name":"exec","args":[]}} 
2016-11-07T20:28:02.704620+00:00 app[web.1]: results = undefined 
2016-11-07T20:27:43+00:00 app[heroku-redis]: source=REDIS sample#active-connecti 

還沒有解決問題。

Answer 1

唉！從node_redis'測試的一個例子是：

it('does not execute transaction if watched key was modified prior to execution', function (done) { 
     client.WATCH(watched); 
     client.incr(watched); 
     var multi = client.multi(); 
     multi.incr(watched); 
     multi.exec(helper.isNull(done)); 
    }); 

我所做的一切是這樣的：

it('does not execute transaction if watched key was modified prior to execution', function (done) { 
     client.WATCH(watched); 
     client.incr(watched); 
     client.multi(); 
     client.incr(watched); 
     client.exec(helper.isNull(done)); 
    }); 

在這裏我要離開這個。也許它會幫助下一個人。