从 axios 获取的数据无缘无故地存储在一个附加数组中

Question

我正在从 mongo 获取以下数据：

"data": [
        {
            "_id": "5ee3f064344d21fb2645f5c0",
            "name": "John",
            "surname": "Doe",
            "email": "john@gmail.com",
            "createdAt": "2020-06-12T21:15:16.624Z",
            "__v": 0
        },
        {
            "_id": "5ee5e27f1ecd8f05ad764057",
            "name": "Jane",
            "surname": "Doe",
            "email": "jane@gmail.com",
            "createdAt": "2020-06-14T08:40:31.701Z",
            "__v": 0
        }

我正在使用 axios 来获取数据。 下面是我获取数据的代码：

async function getUser() {
    const user = await axios.get('/api/plugins/users');

    dispatch({
      type: 'GET_USER',
      payload: user.data.data,
    });
  }

数据都很好，但问题是我在另一个数组中获取数据数组，我不知道如何。

这是我得到的：

[
  [
    {"_id":"5ee3f064344d21fb2645f5c0","name":"John","surname":"Doe","email":"john@gmail.com","createdAt":"2020-06-12T21:15:16.624Z","__v":0},
{"_id":"5ee5e27f1ecd8f05ad764057","name":"Jane","surname":"Doe","email":"jane@gmail.com","createdAt":"2020-06-14T08:40:31.701Z","__v":0}
  ]
]

这是我的初始 State 和减速器，两者都在单独的文件中：

const initialState = {
  users: [],
  loading: true,
};

case 'GET_USER':
      return {
        ...state,
        users: [...state.users, action.payload],
        loading: false,
      };

这对我来说似乎很奇怪，我不确定是什么导致它将数据放入另一个数组中。 有人可以看看吗。

Answer 1

action.payload是一个数组。 state 合并错误

case 'GET_USER':
      return {
        ...state,
        users: [...state.users, action.payload], //it's wrong.It will create nested array
        loading: false,
      };

它应该是

users: [...state.users, ...action.payload], // spread array element in users