Angular 从firestore中提取数据时出现角度应用程序类型错误
我正在尝试从firebase检索一个名为“availableExercises”的集合。我使用的是rxjs 6,当我映射并分配对象中的值时,会出现一些错误 不知怎么的,这个应用程序仍然在运行,但我对这个错误感到非常困惑 我的练习模式如下:Angular 从firestore中提取数据时出现角度应用程序类型错误,angular,typescript,firebase,rxjs6,Angular,Typescript,Firebase,Rxjs6,我正在尝试从firebase检索一个名为“availableExercises”的集合。我使用的是rxjs 6,当我映射并分配对象中的值时,会出现一些错误 不知怎么的,这个应用程序仍然在运行,但我对这个错误感到非常困惑 我的练习模式如下: export interface Exercise { id: string; name: string; duration: number; calories: number; date?: Date; state?: 'comple
export interface Exercise {
id: string;
name: string;
duration: number;
calories: number;
date?: Date;
state?: 'completed' | 'cancelled' | null;
}
以下是我正在调用的函数:
fetchAvailableExercises() {
this.db
.collection('availableExercises')
.snapshotChanges()
.pipe(
map(docArray => {
return docArray.map(doc => {
return {
id: doc.payload.doc.id,
name: doc.payload.doc.data().name,
duration: doc.payload.doc.data().duration,
calories: doc.payload.doc.data().calories
};
});
})
)
.subscribe((exercises: Exercise[]) => {
this.availableExercises = exercises;
this.exercisesChanged.next([...this.availableExercises]);
});
}
运行ng serve时出现以下错误:
ERROR in src/app/training/training.service.ts(26,44): error TS2339: Property 'name' does not exist on type '{}'.
src/app/training/training.service.ts(27,48): error TS2339: Property 'duration' does not exist on type '{}'.
src/app/training/training.service.ts(28,48): error TS2339: Property 'calories' does not exist on type '{}'.
以下是我的依赖项:
"dependencies": {
"@angular/animations": "^6.1.0",
"@angular/cdk": "^6.4.1",
"@angular/common": "^6.1.0",
"@angular/compiler": "^6.1.0",
"@angular/core": "^6.1.0",
"@angular/flex-layout": "^6.0.0-beta.17",
"@angular/forms": "^6.1.0",
"@angular/http": "^6.1.0",
"@angular/material": "^6.4.1",
"@angular/platform-browser": "^6.1.0",
"@angular/platform-browser-dynamic": "^6.1.0",
"@angular/pwa": "^0.6.8",
"@angular/router": "^6.1.0",
"@angular/service-worker": "^6.1.0",
"angularfire2": "^5.0.0-rc.11",
"core-js": "^2.5.7",
"firebase": "^5.3.0",
"hammerjs": "^2.0.8",
"rxjs": "^6.2.2",
"zone.js": "^0.8.26"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.7.0",
"@angular/cli": "^6.0.8",
"@angular/compiler-cli": "^6.1.0",
"@angular/language-service": "^6.1.0",
"@types/jasmine": "^2.8.8",
"@types/jasminewd2": "~2.0.2",
"@types/node": "^10.5.4",
"codelyzer": "^4.4.2",
"jasmine-core": "~3.1.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "^2.0.5",
"karma-chrome-launcher": "~2.2.0",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^2.0.1",
"karma-jasmine": "^1.1.2",
"karma-jasmine-html-reporter": "^1.2.0",
"protractor": "~5.4.0",
"ts-node": "~7.0.0",
"tslint": "~5.11.0",
"typescript": "^2.7.2"
}
如果Iconsole.log(doc.payload.doc.data())代码>
我将预期数据作为对象获取,如下所示:
{carries:8,duration:60,name:“Burpees”}
您的订阅需要一个Exercise
对象数组,但它得到的是一个通用对象数组
不要执行return{
,而是创建一个类型为Exercise
的对象并返回它
let exercise: Exercise = {
id: doc.payload.doc.id,
name: doc.payload.doc.data().name,
duration: doc.payload.doc.data().duration,
calories: doc.payload.doc.data().calories
};
return exercise;
我还建议在集合中定义一个类型
this.db.collection<Exercise>('availableExercises')
this.db.collection('availableExercises'))
您的订阅需要一个Exercise
对象数组,但它得到的是一个通用对象数组
不要执行return{
,而是创建一个类型为Exercise
的对象并返回它
let exercise: Exercise = {
id: doc.payload.doc.id,
name: doc.payload.doc.data().name,
duration: doc.payload.doc.data().duration,
calories: doc.payload.doc.data().calories
};
return exercise;
我还建议在集合中定义一个类型
this.db.collection<Exercise>('availableExercises')
this.db.collection('availableExercises'))
如果您使用console.log(doc),您是否获得了记录?@SureshKumarAriya是的,我收到了我期望的结果,如果您使用console.log(doc),doc是firebase提供的一个带有效负载的对象你收到记录了吗?@SureshKumarAriya是的,我收到了我期望的,doc是firebase的一个对象,有一个有效负载。在集合中定义类型似乎是我需要的修复。在集合中定义类型似乎是我需要的修复。