我已将我的应用程序更新为Angular 4，据我所知，除了动画外，它不应该导致更改。
但是，我之前正在使用的应用程序失败，例外情况为：
Uncaught TypeError: Cannot convert undefined or null to object
at Function.keys (<anonymous>)
at combineReducers (vendor.bundle.js:68589)
at Object._initialReducerFactory [as a] (vendor.bundle.js:68531)
似乎是由ng-rx商店引起的，我没有更新（或更改了！的实现。）。
我可以打破chrome中的combineReducers行，它首先使用我的完整减速器列表来调用该函数，因为我期望两次，作为compose和combineReducers的一部分（参见下面的代码）。然后，在未定义的Reducer列表上再次随机调用它。
追溯调用堆栈并没有让我走得太远。它来自＆＃34; AppModuleInjector＆＃34;，用以下行：
get _INITIAL_REDUCER_94():any {
if ((this.__INITIAL_REDUCER_94 == null)) { (this.__INITIAL_REDUCER_94 = import8._initialReducerFactory(this.__INITIAL_REDUCER_93)); }
return this.__INITIAL_REDUCER_94;
}
这个.__ INITIAL_REDUCER_93未定义。我不知道这些东西是什么，或者它们起源于何处。我的代码中只出现了两次combineReducers：
const reducers = {
profile: profileReducer,
..etc (this is what appears fine as a list of reducers the first function call)
};
const productionReducer: ActionReducer<AppState> = combineReducers(reducers);
const developmentReducer: ActionReducer<AppState> = compose(storeFreeze, combineReducers)(reducers);
我对于出了什么问题感到有些失落，以及Angular 4的变化可能导致了什么。我没有发现任何谷歌搜索。任何人都知道在哪里可以看得更远或问题是什么？
修改
有趣的是，违规的减速器在createInternal():import1.AppModule中被调用：
this._REDUX_DEVTOOLS_EXTENSION_28 = import38._createReduxDevtoolsExtension();
它为空的原因是它导致它在之后发生：
this.__INITIAL_REDUCER_93 = import56.reducer;
Edit2：再看看NPM安装/包。似乎那里有一些不确定的东西。我在一堆角度组件上得到了未满足的依赖：
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.1: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN ng2-pdf-viewer@1.0.2 requires a peer of @angular/core@^2.2.1 but none was installed.
npm WARN @ngrx/store@2.2.1 requires a peer of @angular/core@^2.0.0 but none was installed.
npm WARN angular-calendar@0.7.3 requires a peer of @angular/common@>=2.0.0 <5.0.0 but none was installed.
npm WARN angular-calendar@0.7.3 requires a peer of @angular/core@>=2.0.0 <5.0.0 but none was installed.
npm WARN angular-calendar@0.7.3 requires a peer of @angular/platform-browser@>=2.0.0 <5.0.0 but none was installed.
npm WARN @ngrx/effects@2.0.1 requires a peer of @angular/core@^2.0.0 but none was installed.
npm WARN ng2-file-upload@1.2.0 requires a peer of @angular/common@^2.3.0 but none was installed.
npm WARN ng2-file-upload@1.2.0 requires a peer of @angular/core@^2.3.0 but none was installed.
npm WARN ngrx-store-localstorage@0.1.5 requires a peer of @angular/core@^2.0.0-rc.5 but none was installed.
npm WARN ng2-charts@1.5.0 requires a peer of @angular/common@^2.3.0 but none was installed.
npm WARN ng2-charts@1.5.0 requires a peer of @angular/core@^2.3.0 but none was installed.
npm WARN angular-draggable-droppable@0.5.4 requires a peer of @angular/core@>=2.0.0 <5.0.0 but none was installed.
npm WARN angular-resizable-element@0.7.2 requires a peer of @angular/core@>=2.0.0 <5.0.0 but none was installed.
但我已经在我的packages.json中找到了这些：
"dependencies": {
"@angular/common": "4.0.0-rc.5",
"@angular/compiler": "4.0.0-rc.5",
"@angular/core": "4.0.0-rc.5",
"@angular/forms": "4.0.0-rc.5",
"@angular/http": "4.0.0-rc.5",
"@angular/platform-browser": "4.0.0-rc.5",
"@angular/platform-browser-dynamic": "4.0.0-rc.5",
"@angular/router": "4.0.0-rc.5",
"@ngrx/core": "^1.2.0",
"@ngrx/effects": "^2.0.0",
"@ngrx/store": "^2.2.1",
"@ngrx/store-devtools": "^3.2.1",
"@types/body-parser": "^0.0.32",
"@types/compression": "^0.0.33",
"@types/cors": "^0.0.33",
"@types/express": "^4.0.32",
"@types/jasmine": "^2.5.43",
"@types/jsonwebtoken": "^7.1.31",
"@types/lodash": "^4.14.54",
"@types/node": "^6.0.48",
"@types/node-uuid": "^0.0.28",
"angular-calendar": "^0.7.3",
"body-parser": "~1.13.2",
"chart.js": "^2.5.0",
"codelyzer": "^2.0.1",
"compression": "^1.6.2",
"concurrently": "^3.3.0",
"cookie-parser": "^1.3.5",
"core-js": "^2.4.1",
"express": "^4.13.4",
"express-jwt": "^3.3.0",
"html-pdf": "^2.1.0",
"http-proxy": "^1.16.2",
"immutable": "^3.8.1",
"jsonwebtoken": "^5.7.0",
"lodash": "^4.17.4",
"multer": "^1.3.0",
"mysql": "^2.13.0",
"ng2-charts": "^1.5.0",
"ng2-file-upload": "^1.2.0",
"ng2-pdf-viewer": "^1.0.2",
"ngrx-store-freeze": "^0.1.9",
"ngrx-store-localstorage": "^0.1.5",
"ngx-mydatepicker": "0.0.6",
"node-uuid": "^1.4.7",
"normalizr": "^3.1.0",
"passport": "^0.3.2",
"passport-local": "^1.0.0",
"passport-token": "^0.2.0",
"path": "^0.12.7",
"reselect": "^2.5.4",
"rxjs": "^5.1.1",
"ts-helpers": "^1.1.1",
"typed-immutable-record": "0.0.6",
"zone.js": "^0.8.4"
},
"devDependencies": {
"@angular/cli": "1.0.0-rc.2",
"@angular/compiler-cli": ">=4.0.0-beta <5.0.0",
"@types/jasmine": "2.5.38",
"@types/node": "~6.0.60",
"codelyzer": "~2.0.0",
"jasmine-core": "~2.5.2",
"jasmine-spec-reporter": "~3.2.0",
"karma": "~1.4.1",
"karma-chrome-launcher": "~2.0.0",
"karma-cli": "~1.0.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"karma-coverage-istanbul-reporter": "^0.2.0",
"protractor": "~5.1.0",
"ts-node": "~2.0.0",
"tslint": "~4.5.0",
"typescript": "~2.1.0"
}
我得到＆＃34;未满足的同伴依赖＆＃34;在安装所述依赖项时：
C：\ Users \ user \ Documents \ Projects \ project＆gt; npm install @ angular / core @ 4.0.0-rc.5 --save angular2-express-starter@1.0.0 C：\ Users \ user \ Documents \ Projects \ project + - UNMET PEER DEPENDENCY @ angular / common @ 4.0.0-rc.5 + - UNMET PEER DEPENDENCY @ angular / core @ 4.0.0-rc.5 ` - UNMET PEER DEPENDENCY @ angular / platform-browser @ 4.0.0-rc.5
答案 0 :(得分：2)