如何在graphql apollo服务器变异解析程序中发出错误信号？

说明解析程序具有以下形式：

fieldName: (obj, args, context, info) => result

如果“找不到对象”，则该结果为

null

或

undefined

其他错误怎么办？例如，如果访问未经授权

似乎不能直接“返回”错误，因为结果必须与模式匹配

我尝试在解析器中抛出一个异常，这几乎是正确的：客户端得到一个错误，其中包含异常消息：太好了。但是apollo服务器发出堆栈跟踪，就好像没有处理异常一样。这似乎不对

因此，问题是：应该如何做到这一点

---

阿波罗服务器堆栈跟踪，如果有帮助：

Error: test exception message
at /Users/mgregory/NRN/src/agreeonit/apollo_server/resolvers/mutationResolvers.js:29:17
at tryCatcher (/Users/mgregory/NRN/src/agreeonit/apollo_server/node_modules/bluebird/js/release/util.js:16:23)
at Promise._settlePromiseFromHandler (/Users/mgregory/NRN/src/agreeonit/apollo_server/node_modules/bluebird/js/release/promise.js:510:31)
at Promise._settlePromise (/Users/mgregory/NRN/src/agreeonit/apollo_server/node_modules/bluebird/js/release/promise.js:567:18)
at Promise._settlePromise0 (/Users/mgregory/NRN/src/agreeonit/apollo_server/node_modules/bluebird/js/release/promise.js:612:10)
at Promise._settlePromises (/Users/mgregory/NRN/src/agreeonit/apollo_server/node_modules/bluebird/js/release/promise.js:691:18)
at Async._drainQueue (/Users/mgregory/NRN/src/agreeonit/apollo_server/node_modules/bluebird/js/release/async.js:138:16)
at Async._drainQueues (/Users/mgregory/NRN/src/agreeonit/apollo_server/node_modules/bluebird/js/release/async.js:148:10)
at Immediate.Async.drainQueues (/Users/mgregory/NRN/src/agreeonit/apollo_server/node_modules/bluebird/js/release/async.js:17:14)
at runCallback (timers.js:574:20)
at tryOnImmediate (timers.js:554:5)
at processImmediate [as _immediateCallback] (timers.js:533:5)

---

我发现发出堆栈跟踪是因为

GraphQLOptions.debug

的默认设置为

true

在初始化服务器时将其设置为false会清除所有内容

结论：抛出异常是正确的方法