仅按键在Firestore中查找文档

const firebase = require('firebase/app');
require('firebase/firestore');

// Initialize Firebase
const firebaseConfig = {
  // Your Firebase config here
};
firebase.initializeApp(firebaseConfig);
const db = firebase.firestore();

// Document reference
const docRef = db.collection('yourCollectionName').doc('yourDocumentId');

// Get the document
docRef.get().then((doc) => {
  if (doc.exists) {
    console.log('Document data:', doc.data());
  } else {
    console.log('No such document!');
  }
}).catch((error) => {
  console.log('Error getting document:', error);
});

const firebase = require('firebase/app');
require('firebase/firestore');

// Initialize Firebase
const firebaseConfig = {
  // Your Firebase config here
};
firebase.initializeApp(firebaseConfig);
const db = firebase.firestore();

// Query using where() and ==
db.collection('yourCollectionName').where('yourFieldName', '==', 'yourFieldValue')
  .get().then((querySnapshot) => {
    querySnapshot.forEach((doc) => {
      console.log(`${doc.id} => ${doc.data()}`);
    });
  }).catch((error) => {
    console.log('Error getting documents:', error);
  });

const firebase = require('firebase/app');
require('firebase/firestore');

// Initialize Firebase
const firebaseConfig = {
  // Your Firebase config here
};
firebase.initializeApp(firebaseConfig);
const db = firebase.firestore();

// Query using doc() and query parameters
db.collection('yourCollectionName').where('yourFieldName1', '==', 'yourFieldValue1')
  .where('yourFieldName2', '==', 'yourFieldValue2')
  .get().then((querySnapshot) => {
    querySnapshot.forEach((doc) => {
      console.log(`${doc.id} => ${doc.data()}`);
    });
  }).catch((error) => {
    console.log('Error getting documents:', error);
  });