多个 Axios 请求进入 ReactJS 状态 [英] Multiple Axios Requests Into ReactJS State

问题描述

所以我一直在我的 React JS 组件中放置以下代码，我基本上试图将两个 API 调用置于一个名为 vehicles 的状态，但是我收到以下代码的错误:

So I have been placing the following code within my React JS component and I am basically trying to put both API calls into one state called vehicles however I am getting an error with the following code:

componentWillMount() {

    // Make a request for vehicle data

    axios.all([
      axios.get('/api/seat/models'),
      axios.get('/api/volkswagen/models')
    ])
    .then(axios.spread(function (seat, volkswagen) {
      this.setState({ vehicles: seat.data + volkswagen.data })
    }))
    //.then(response => this.setState({ vehicles: response.data }))
    .catch(error => console.log(error));
  }

现在我猜我不能添加两个数据源，就像我有 this.setState({车辆:seat.data + volkswagen.data }) 但是还能怎么做?我只想将来自该 API 请求的所有数据都置于一个状态.

Now I am guessing I can't add two sources of data like I have this.setState({ vehicles: seat.data + volkswagen.data }) however how else can this be done? I just want all of the data from that API request to be put into the one state.

这是我收到的当前错误:

This is the current error I am receiving:

TypeError: Cannot read property 'setState' of null(…)

谢谢

推荐答案

您不能将数组添加"在一起.使用 array.concat 函数(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/concat) 将两个数组连接成一个，然后将其设置为状态.

You cannot "add" arrays together. Use the array.concat function (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/concat) to concatenate both arrays into one and then set that as the state.

componentWillMount() {

   // Make a request for vehicle data

   axios.all([
     axios.get('/api/seat/models'),
     axios.get('/api/volkswagen/models')
   ])
   .then(axios.spread(function (seat, volkswagen) {
     let vehicles = seat.data.concat(volkswagen.data);
     this.setState({ vehicles: vehicles })
   }))
   //.then(response => this.setState({ vehicles: response.data }))
   .catch(error => console.log(error));

}

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