typeError:不能在角9.0.4中指定对象的“[对象对象]”的只读属性“tView”

Question

我一直在使用角8，最近更新为角9。但是当我运行这个项目时，它会在控制台中向我显示这个错误：

错误: Uncaught (承诺)：TypeError:无法指定只读属性'tView‘对象' Object’TypeError:无法分配只读属性'tView‘of Object’object‘at getOrCreateTComponentView (core.js:7621) at createRootComponentView (core.js:18895)

这是我的package.json：

    "dependencies": {
    "@angular/animations": "^9.0.4",
    "@angular/cdk": "^9.1.0",
    "@angular/common": "^9.0.4",
    "@angular/compiler": "^9.0.4",
    "@angular/core": "^9.0.4",
    "@angular/flex-layout": "^9.0.0-beta.28",
    "@angular/forms": "^9.0.4",
    "@angular/localize": "^9.0.4",
    "@angular/platform-browser": "^9.0.4",
    "@angular/platform-browser-dynamic": "^9.0.4",
    "@angular/platform-server": "^9.0.4",
    "@angular/router": "^9.0.4",
    "@aspnet/signalr": "^1.1.4",
    "@mat-datetimepicker/core": "^3.0.0",
    "@ng-bootstrap/ng-bootstrap": "^4.2.1",
    "@ngrx/effects": "^8.0.1",
    "@ngrx/entity": "^8.0.1",
    "@ngrx/router-store": "^8.0.1",
    "@ngrx/store": "^8.0.1",
    "@ngrx/store-devtools": "^8.0.1",
    "@ngx-loading-bar/core": "^4.2.0",
    "@ngx-translate/core": "^11.0.1",
    "@types/lodash": "^4.14.134",
    "angular-in-memory-web-api": "^0.8.0",
    "angular2-permission": "^0.1.3",
    "angular2-promise-buttons": "^4.0.0",
    "chart.js": "^2.8.0",
    "chartist": "^0.11.2",
    "classlist.js": "^1.1.20150312",
    "core-js": "^3.1.4",
    "hammerjs": "^2.0.8",
    "highlight.js": "^9.15.8",
    "jwt-decode": "^2.2.0",
    "lodash": "^4.17.11",
    "material-design-icons": "^3.0.1",
    "moment": "^2.24.0",
    "ng-inline-svg": "^8.4.1",
    "ng2-jalali-date-picker": "^2.2.7",
    "ngrx-store-freeze": "^0.2.4",
    "ngx-clipboard": "^12.1.0",
    "ngx-daterangepicker-material": "^2.1.3",
    "ngx-highlightjs": "^3.0.3",
    "ngx-material-file-input": "^1.1.1",
    "ngx-perfect-scrollbar": "^8.0.0",
    "ngx-permissions": "^7.0.2",
    "ngx-toastr": "^10.0.4",
    "object-path": "^0.11.4",
    "rxjs": "^6.5.2",
    "tslib": "^1.10.0",
    "web-animations-js": "^2.3.1",
    "zone.js": "~0.10.2"
},
"devDependencies": {
    "@angular-devkit/build-angular": "^0.900.4",
    "@angular/cli": "^9.0.4",
    "@angular/compiler-cli": "^9.0.4",
    "@angular/language-service": "^9.0.4",
    "@angular/material": "^9.1.0",
    "@angular/material-moment-adapter": "^9.1.0",
    "@ngrx/schematics": "^8.0.1",
    "@types/chartist": "^0.9.46",
    "@types/highlight.js": "^9.12.3",
    "@types/jasmine": "~3.3.13",
    "@types/jasminewd2": "~2.0.6",
    "@types/node": "~12.0.8",
    "@types/object-path": "^0.11.0",
    "codelyzer": "^5.1.0",
    "jasmine-core": "~3.4.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "^4.1.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^2.0.5",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.4.2",
    "protractor": "~5.4.2",
    "ts-node": "~8.2.0",
    "tslint": "~5.17.0",
    "typescript": "^3.6.4",
    "webpack-bundle-analyzer": "^3.3.2"
}

Answer 1

你在用ngrx和ngrx-商店冻结。很可能您的存储区中有一个包含角分量/模板/指令的操作或数据模型。如果将storeFreeze从metaReducers中删除，则很可能再也看不到错误了。

不过，您应该找出还原器将这个组件添加到商店中的原因，并找到另一种方法来处理这个问题。无论如何，在你的商店里放这样的东西肯定不是个好主意。

Answer 2

这是从角9开始的NGRX商店和常春藤运行时的一个问题。

这个问题最好在这里解释：https://github.com/ngrx/platform/issues/2109

目前的解决办法(2020年3月16日)是将两者都禁用。

strictStateImmutability and strictActionImmutability

在您的StoreModule转接器中

EffectsModule.forRoot([AuthEffects]), 
StoreModule.forRoot(reducers, 
    { metaReducers, 
        runtimeChecks: { 
            strictStateImmutability: false, 
            strictActionImmutability: false,
        } 
    }
), 

当然，这是一个解决办法，并不能解决问题。目前NGRX https://github.com/ngrx/platform/issues/2404存在一个问题。

Answer 3

我只是在这里分享我的2分钱，因为我发现我犯了一个错误，这导致了同样的错误。我在ngrx的选择器里做了一个突变。

我的错误是：

不能指定对象'object‘的只读属性'0’

export const selectInspections = createSelector(selectInspectionsFeature, (state) =>
    state.inspections.sort((a, b) => (a.dateTimeUpdated > b.dateTimeUpdated ? -1 : 1))
);

通过这样改变它来解决这个问题：

export const selectInspections = createSelector(selectInspectionsFeature, 
(state) =>
    [...state.inspections].sort((a, b) => (a.dateTimeUpdated > b.dateTimeUpdated ? -1 : 1))
);

现在我不修改选择器内的状态。