我正在关注this guide。我试图在我的节点应用程序中收听graphQL订阅。我在执行该订阅时遇到很多麻烦。我尝试了几种不同的方法,下面列出了这些方法,但没有一种起作用。
// converted to rxjs observables
from(PrismaClient.$subscribe.priority({
mutation_in: "CREATED"
})).subscribe(
(next) => {
console.log("next", next);
},
() => {
console.log("error");
},
() => {
console.log("complete");
}
);
// as promise
PrismaClient.$subscribe.priority({
mutation_in: "CREATED"
}).then(
(next) => {
console.log("next", next);
}
);
这两个都在下一个中返回:
{ next: [Function: next],
return: [Function: return],
throw: [Function: throw],
'@@asyncIterator': [Function] }
我希望它会在每次创建新priority
时返回创建的Promise<AsyncIterator<...>>
。但是,它只返回一次,并立即完成并返回上面列出的对象。
我知道这与返回prisma-client
有关,但是我不确定如何解决此问题。
如何使用rxjs
在节点应用中创建pyramida graphql订阅?我也想将其转换为promises
而不是使用Observables
。我只喜欢ProcessBuilder gradlewProcessBuilder = new ProcessBuilder(mainDirPath.concat("\\android\\gradlew.bat"), "assembleDebug");
gradlewProcessBuilder.directory(new File(mainDirPath.concat("/android")));
gradlewProcessBuilder.redirectOutput(ProcessBuilder.Redirect.INHERIT); //This is the line
Process gradlewProcess = gradlewProcessBuilder.start();
gradlewProcess.waitFor();
。
答案 0 :(得分:1)
以下是关于Promises和async / await的建议:
const main = async () => {
const subscription = await PrismaClient.$subscribe.priority({
mutation_in: 'CREATED',
})
handleSubscription(subscription)
}
const handleSubscription = async (subscription) => {
const result = await subscription.next()
console.log('do stuff with', result.value)
if (!result.done) {
console.log('handle again')
handleSubscription(subscription)
}
else {
console.log('done')
}
}
main().catch(e => console.error(e))