[英]ERROR Error: Uncaught (in promise): Error: No provider for Boolean
I am dealing with an Angular 4 application written by my predecessor.我正在处理由我的前任编写的 Angular 4 应用程序。 The application now builds and runs, but after loading, I am getting this in the browser's console:应用程序现在构建并运行,但加载后,我在浏览器的控制台中得到这个:
core.es5.js:1020 ERROR Error: Uncaught (in promise): Error: No provider for Boolean!
Error: No provider for Boolean!
at injectionError (core.es5.js:1169)
at noProviderError (core.es5.js:1207)
at ReflectiveInjector_.webpackJsonp.../../../core/@angular/core.es5.js.ReflectiveInjector_._throwOrNull (core.es5.js:2649)
at ReflectiveInjector_.webpackJsonp.../../../core/@angular/core.es5.js.ReflectiveInjector_._getByKeyDefault (core.es5.js:2688)
at ReflectiveInjector_.webpackJsonp.../../../core/@angular/core.es5.js.ReflectiveInjector_._getByKey (core.es5.js:2620)
at ReflectiveInjector_.webpackJsonp.../../../core/@angular/core.es5.js.ReflectiveInjector_.get (core.es5.js:2489)
at resolveNgModuleDep (core.es5.js:9492)
at _createClass (core.es5.js:9537)
at _createProviderInstance$1 (core.es5.js:9503)
at resolveNgModuleDep (core.es5.js:9488)
at resolvePromise (zone.js:831)
at resolvePromise (zone.js:788)
at zone.js:892
at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:423)
at Object.onInvokeTask (core.es5.js:3881)
at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:422)
at Zone.webpackJsonp.../../../../zone.js/dist/zone.js.Zone.runTask (zone.js:195)
at drainMicroTaskQueue (zone.js:601)
defaultErrorLogger @ core.es5.js:1020
webpackJsonp.../../../core/@angular/core.es5.js.ErrorHandler.handleError @ core.es5.js:1080
next @ core.es5.js:4503
schedulerFn @ core.es5.js:3635
webpackJsonp.../../../../rxjs/Subscriber.js.SafeSubscriber.__tryOrUnsub @ Subscriber.js:242
webpackJsonp.../../../../rxjs/Subscriber.js.SafeSubscriber.next @ Subscriber.js:189
webpackJsonp.../../../../rxjs/Subscriber.js.Subscriber._next @ Subscriber.js:129
webpackJsonp.../../../../rxjs/Subscriber.js.Subscriber.next @ Subscriber.js:93
webpackJsonp.../../../../rxjs/Subject.js.Subject.next @ Subject.js:55
webpackJsonp.../../../core/@angular/core.es5.js.EventEmitter.emit @ core.es5.js:3621
(anonymous) @ core.es5.js:3912
webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invoke @ zone.js:391
webpackJsonp.../../../../zone.js/dist/zone.js.Zone.run @ zone.js:150
webpackJsonp.../../../core/@angular/core.es5.js.NgZone.runOutsideAngular @ core.es5.js:3844
onHandleError @ core.es5.js:3912
webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.handleError @ zone.js:395
webpackJsonp.../../../../zone.js/dist/zone.js.Zone.runGuarded @ zone.js:164
_loop_1 @ zone.js:694
api.microtaskDrainDone @ zone.js:703
drainMicroTaskQueue @ zone.js:608
Promise.then (async)
scheduleMicroTask @ zone.js:584
webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:413
webpackJsonp.../../../../zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:238
webpackJsonp.../../../../zone.js/dist/zone.js.Zone.scheduleMicroTask @ zone.js:258
scheduleResolveOrReject @ zone.js:879
ZoneAwarePromise.then @ zone.js:1012
webpackJsonp.../../../core/@angular/core.es5.js.PlatformRef_._bootstrapModuleWithZone @ core.es5.js:4537
webpackJsonp.../../../core/@angular/core.es5.js.PlatformRef_.bootstrapModule @ core.es5.js:4522
../../../../../src/main.ts @ main.ts:11
__webpack_require__ @ bootstrap 5216c4c…:54
0 @ main.bundle.js:8832
__webpack_require__ @ bootstrap 5216c4c…:54
webpackJsonpCallback @ bootstrap 5216c4c…:25
(anonymous) @ main.bundle.js:1
I have tried grepping from the project's root for Boolean
, thinking it might have been a typo in a constructor somewhere.我曾尝试从项目的根目录搜索Boolean
,认为它可能是某个构造函数中的拼写错误。 But grep cannot find a single hit.但是 grep 找不到单个命中。
The trace points to either core.es5.js or zone.js but nowhere to my application code so I don't really know where to start looking.跟踪指向 core.es5.js 或 zone.js 但无处指向我的应用程序代码,所以我真的不知道从哪里开始寻找。
How can I get to the bottom of this and find where the error is?我怎样才能找到这个问题的底部并找到错误所在?
Aaaaaaand it was just that... A boolean injected in a component's constructor. Aaaaaa 就是这样... 一个注入到组件构造函数中的布尔值。 I just had missed it because I looked at the code too much and it was boolean
not Boolean
.我只是错过了它,因为我看代码太多了,它是boolean
而不是Boolean
。
You need to look for Promise in the code that returns a boolean value.您需要在返回布尔值的代码中查找 Promise。 Write something like:写一些类似的东西:
find . -type f|xargs grep --color Promise
Then change the value to something else然后将值更改为其他值
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