firebase RTDB startAfter() 不是一个函数

Question

我正在尝试使用 Vuefire 对项目列表进行分页，由于某种原因，我收到以下代码的错误（当我调用 时startAfter()，该函数可以正常工作startAt()）

lastVisible是我的组件状态中具有属性的对象expire_date（UNIX 时间戳）

这是我得到的错误

知道出了什么问题吗？

    async seeFurtherGames() {
      var games_ref = db.ref('games')
      console.log("GameBrowser.seeOlderGames()", this.lastVisible, games_ref)
      if (this.lastVisible) {
        var start = this.lastVisible.expire_date
        var query = games_ref.orderByChild('expire_date').startAfter(start).limitToFirst(this.item_limit)
        await this.$bind("games", query)
        this.setLastVisible()
        
      }
    }

Uncaught (in promise) TypeError: games_ref.orderByChild(...).startAfter is not a function
    at _callee3$ (webpack-internal:///./node_modules/cache-loader/dist/cjs.js?!./node_modules/babel-loader/lib/index.js!./node_modules/cache-loader/dist/cjs.js?!./node_modules/vue-loader/lib/index.js?!./src/views/GameBrowser.vue?vue&type=script&lang=js&:257)
    at f (chrome-extension://bfnaelmomeimhlpmgjnjophhpkkoljpa/content_script/inpage.js:141)
    at Generator._invoke (chrome-extension://bfnaelmomeimhlpmgjnjophhpkkoljpa/content_script/inpage.js:141)
    at Generator.next (chrome-extension://bfnaelmomeimhlpmgjnjophhpkkoljpa/content_script/inpage.js:141)
    at asyncGeneratorStep (webpack-internal:///./node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js:9)
    at _next (webpack-internal:///./node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js:31)
    at eval (webpack-internal:///./node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js:38)
    at new Promise (<anonymous>)
    at eval (webpack-internal:///./node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js:27)
    at VueComponent.seeFurtherGames (webpack-internal:///./node_modules/cache-loader/dist/cjs.js?!./node_modules/babel-loader/lib/index.js!./node_modules/cache-loader/dist/cjs.js?!./node_modules/vue-loader/lib/index.js?!./src/views/GameBrowser.vue?vue&type=script&lang=js&:270)

Answer 1

Firebase 实时数据库中的 和 操作是在JavaScript SDK版本 8.2.7startAfter中引入的。endBefore