如何使用Firestore和Angular从数组中查询对象
我正试图从Firestore中查询一个对象,即如何使用Firestore和Angular从数组中查询对象,angular,typescript,firebase,google-cloud-firestore,Angular,Typescript,Firebase,Google Cloud Firestore,我正试图从Firestore中查询一个对象,即uid,以便将以下对象作为值返回 我已经尝试创建一个函数来获取对象“香蕉” getFruit(fruitUid: string, basketUid: string): Promise<any> { const basketRef = this.afs.doc(`basket/${basketUid}`).ref; return this.afs.firestore.runTransaction((ts) => {
uid
,以便将以下对象作为值返回
我已经尝试创建一个函数来获取对象“香蕉”
getFruit(fruitUid: string, basketUid: string): Promise<any> {
const basketRef = this.afs.doc(`basket/${basketUid}`).ref;
return this.afs.firestore.runTransaction((ts) => {
return ts.get(basketUid).then((sfDoc) => {
return sfDoc.data().fruits
.filter(fruit => fruit.uid === fruitUid);
});
});
}
有没有办法通过指定
uid
来获取特定对象,这样我就可以从数组fruits
返回特定的fruits
?对于单个文档检索,您不需要事务:
getFruit(fruitUid: string, basketUid: string): Promise<any> {
const basketRef = this.afs.doc(`basket/${basketUid}`);
return basketRef.get().then((sfDoc) => {
return sfDoc.data().fruits
.filter(fruit => fruit.uid === fruitUid);
});
}
getFruit(fruitUid:string,basketUid:string):承诺{
const basketRef=this.afs.doc(`basket/${basketUid}`);
return basketRef.get().then((sfDoc)=>{
返回sfDoc.data()
.filter(fruit=>fruit.uid===fruitUid);
});
}
getFruit(fruitUid: string, basketUid: string): Promise<any> {
const basketRef = this.afs.doc(`basket/${basketUid}`);
return basketRef.get().then((sfDoc) => {
return sfDoc.data().fruits
.filter(fruit => fruit.uid === fruitUid);
});
}