在React Native中无法从Axios响应获取错误消息

时间:2019-11-02 17:32:16

标签: javascript react-native axios

我正在使用React Native编写一个移动应用程序。在某些方面,我需要发送一个发布请求并获得包括错误部分在内的响应。因此,对于某些特定输入,API(我自己的)返回409并显示一条消息。返回示例:

{
    "status": 409,
    "message": "E-mail is already exists!"
}

在这里,我要接收该消息并显示给用户。这是我尝试过的:

UserService.signup({ fullName, email, username, password })
  .then(response => {
    this.setState({ signUp: true });
    if (response.result) {
      Toast.show(messages.successfulSignUp, {
        backgroundColor: "green",
        duration: Toast.durations.LONG,
        position: Toast.positions.TOP
      });
      this.props.navigation.navigate("SignIn");
    } else {
    }
  })
  .catch(error => {
    Toast.show(error.message, {
      backgroundColor: "red",
      duration: Toast.durations.LONG,
      position: Toast.positions.TOP
    });
    this.setState({ signUp: false });
  });

我尝试了error.message, error.response, error, error.data键,但是它总是显示TypeError: undefined is not an object (evaluating 'error.message')。那么,如何从错误对象获取消息?


编辑:这是我发送请求的方式:

import { post } from "./api";

export default {
  signup: ({ fullName, email, username, password }) => {
    return post("/user/register", { fullName, email, username, password });
  }
};

export const request = config => {
  return new Promise((resolve, reject) => {
    axiosInstance
      .request({
        url: config.url,
        method: config.method || "get",
        data: config.body,
        headers: {
          "Content-Type": "application/json",
          "X-Auth-Token": store.getState().auth.token
        }
      })
      .then(response => {
        resolve(response.data);
      })
      .catch(error => {
        reject(error.data);
      });
  });
};

export const post = (url, body = {}) => {
  return request({
    url,
    body,
    method: "post"
  });
};

2 个答案:

答案 0 :(得分:0)

根据后端返回的内容,axios中的错误消息位于错误对象的response.data中。

.catch(error => {

    const errResponse = (error && error.response && error.response.data) 
     || (error && error.message); 

    reject(errResponse);
});

答案 1 :(得分:0)

最后,我解决了这个问题。我必须更改我的请求方法以及解决错误的方法:

export const request = (config) => {
    return new Promise((resolve, reject) => {
        axiosInstance.request({
            url: config.url,
            method: config.method || 'get',
            data: config.body,
            headers: {
                'Content-Type': 'application/json',
                'X-Auth-Token': store.getState().auth.token,
            }
        }).then(response => {
            resolve(response.data)
        }).catch(error => {
            reject(error.response)
        })
    })
}

// This is how reach out to the error message:
console.log(error.data.message);