有效地对在数组中具有值的文档进行AngularFire2查询集合

import { AngularFirestore } from '@angular/fire/firestore';

constructor(private firestore: AngularFirestore) {}

getDocumentsWithValue() {
  return this.firestore.collection('your-collection').ref.where('field', '==', 'value').get();
}

import { AngularFirestore } from '@angular/fire/firestore';

constructor(private firestore: AngularFirestore) {}

getDocumentsWithValue() {
  return this.firestore.collection('your-collection').ref.where('field', '==', 'value').orderBy('field').get();
}

import { AngularFirestore } from '@angular/fire/firestore';

constructor(private firestore: AngularFirestore) {}

getDocumentsWithValue() {
  return this.firestore.collection('your-collection').ref.where('field', '==', 'value').limit(10).get();
}

import { AngularFirestore } from '@angular/fire/firestore';

constructor(private firestore: AngularFirestore) {}

getDocumentsWithValue() {
  return this.firestore.collection('your-collection').ref.where('field', '>=', 'startValue').where('field', '<=', 'endValue').get();
}