我正在使用firebase开发一个Angular应用程序。
这是我得到的错误:
存储在Firestore中的Date对象的行为将会发生变化 你的应用程序可能会破裂。 要隐藏此警告并确保您的应用不会中断,您需要添加 在调用任何其他Cloud Firestore方法之前,将以下代码发送到您的应用:
const firestore = firebase.firestore();
const settings = {/* your settings... */ timestampsInSnapshots: true};
firestore.settings(settings);
通过此更改,存储在Cloud Firestore中的时间戳将被回读为 Firebase Timestamp对象而不是系统Date对象。所以你也会 需要更新代码,期望Date改为期望时间戳。例如:
// Old:
const date = snapshot.get('created_at');
// New:
const timestamp = snapshot.get('created_at');
const date = timestamp.toDate();
启用新行为时,请审核Date的所有现有用法。在一个 未来的发布,行为将改变为新的行为,所以如果你不这样做 按照以下步骤操作,您的应用程序可能会突破。
这是我的package.json文件:
"dependencies": {
"@angular/animations": "^5.2.0",
"@angular/common": "^5.2.0",
"@angular/compiler": "^5.2.0",
"@angular/core": "^5.2.0",
"@angular/forms": "^5.2.0",
"@angular/http": "^5.2.0",
"@angular/platform-browser": "^5.2.0",
"@angular/platform-browser-dynamic": "^5.2.0",
"@angular/router": "^5.2.0",
"angularfire2": "^5.0.0-rc.6.0",
"core-js": "^2.4.1",
"firebase": "^4.13.1",
"rxjs": "^5.5.6",
"zone.js": "^0.8.19"
},
"devDependencies": {
"@angular/cli": "~1.7.4",
"@angular/compiler-cli": "^5.2.0",
"@angular/language-service": "^5.2.0",
"@types/jasmine": "~2.8.3",
"@types/jasminewd2": "~2.0.2",
"@types/node": "~6.0.60",
"codelyzer": "^4.0.1",
"jasmine-core": "~2.8.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~2.0.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~4.1.0",
"tslint": "~5.9.1",
"typescript": "~2.5.3"
}
Firebase -v:4.13.1 AngularFire -v:5.0.0-rc.6.0 操作系统:Mac OSX / Windows(在两个平台上都试过。)
此外,这个错误背后的原因是什么?
答案 0 :(得分:3)
我从 egaviriarestrepo 获得了修复 - https://github.com/angular/angularfire2/issues/1575
无论您何时调用AngularFirestore,都需要在构造函数中添加以下两行:
const settings = {timestampsInSnapshots: true};
afs.app.firestore().settings(settings);
看起来应该是这样的:
export class CoreModule {
constructor( private afs: AngularFirestore) {
const settings = {timestampsInSnapshots: true};
afs.app.firestore().settings(settings);
}
}
如果上述代码不起作用,请尝试以下代码:
export class CoreModule {
constructor( private afs: AngularFirestore) {
const settings = {timestampsInSnapshots: true};
afs.firestore.settings(settings);
}
}