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[英]React/ Redux : Unhandled Rejection (TypeError): Cannot read property 'data' of undefined
[英]React - Redux | Unhandled Rejection (TypeError): Cannot read property 'data' of undefined
一切都很好,直到 login > dispatch > payload: err.response.data。 然后给出一个错误:未处理的拒绝(类型错误):无法读取未定义的属性“数据”我检查了很多来源,但我找不到问题所在。 在注册中,payload: err.response.data 完美运行。 但是在登录时,给出了这个错误
import axios from "axios";
import setAuthToken from "../utils/setAuthToken";
import jwt_decode from "jwt-decode";
import { GET_ERRORS, SET_CURRENT_USER } from "./types";
// Register User
export const registerUser = (userData, history) => dispatch => {
axios
.post("/api/users/register", userData)
.then(res => history.push("/login"))
.catch(err =>
dispatch({
type: GET_ERRORS,
payload: err.response.data
})
);
};
// Login - Get User Token
export const loginUser = userData => dispatch => {
axios
.post("/api/users/login", userData)
.then(res => {
// Save to localStorage
const { token } = res.data;
// Set token to ls
localStorage.setItem("jwtToken", token);
// Set token to Auth header
setAuthToken(token);
// Decode token to get user data
const decoded = jwt_decode(token);
// Set current user
dispatch(setCurrentUser(decoded));
})
.catch(err =>
dispatch({
type: GET_ERRORS,
payload: err.response.data
})
);
};
// Set logged in user
export const setCurrentUser = decoded => {
return {
type: SET_CURRENT_USER,
payload: decoded
};
};
// Log user out
export const logoutUser = () => dispatch => {
// Remove token from localStorage
localStorage.removeItem("jwtToken");
// Remove auth header for future requests
setAuthToken(false);
// Set current user to {} which will set isAuthenticated to false
dispatch(setCurrentUser({}));
};
看起来不错,但我会试试这个:
每当您服务器启动错误时,请确保您发出此对象:
response.json({response: {data: "Error..."}})
否则检查loginUser函数中未定义的对象:
payload: ((err||{}).response||{}).data || 'Error unexpected'
这将在您有未定义的值之前检查您的嵌套对象。
从Oliver Steele 博客中挑选的解决方案
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