Reactjs 未能将Redux传奇与Redux整合
我第一次尝试使用Redux saga,因此我有以下sagas文件: backendAuth.jsReactjs 未能将Redux传奇与Redux整合,reactjs,redux,redux-saga,Reactjs,Redux,Redux Saga,我第一次尝试使用Redux saga,因此我有以下sagas文件: backendAuth.js import {all, call, fork, put, takeEvery} from "redux-saga/effects"; import {auth} from 'backend/backend'; import { SIGNIN_USER, SIGNOUT_USER, SIGNUP_USER } from "constants/ActionTypes"; import {s
import {all, call, fork, put, takeEvery} from "redux-saga/effects";
import {auth} from 'backend/backend';
import {
SIGNIN_USER,
SIGNOUT_USER,
SIGNUP_USER
} from "constants/ActionTypes";
import {showAuthMessage, userSignInSuccess, userSignOutSuccess, userSignUpSuccess} from "actions/Auth";
const createUserWithUsernamePasswordRequest = async (username, password) =>
await auth.createUserWithUsernameAndPassword(username, password)
.then(authUser => {
console.log('authUser: '+authUser);
return authUser;
})
.catch(error => error);
const signInUserWithUsernamePasswordRequest = async (username, password) =>
await auth.signInWithUsernameAndPassword(username, password)
.then(authUser => authUser)
.catch(error => error);
const signOutRequest = async () =>
await auth.signOut()
.then(authUser => authUser)
.catch(error => error);
function* createUserWithUsernamePassword({payload}) {
const {username, email, password} = payload;
try {
const signUpUser = yield call(createUserWithUsernamePasswordRequest, username, email, password);
if (signUpUser.message) {
yield put(showAuthMessage(signUpUser.message));
} else {
localStorage.setItem('user_id', signUpUser.user.uid);
yield put(userSignUpSuccess(signUpUser.user.uid));
}
} catch (error) {
yield put(showAuthMessage(error));
}
}
function* signInUserWithUsernamePassword({payload}) {
const {username, password} = payload;
try {
const signInUser = yield call(signInUserWithUsernamePasswordRequest, username, password);
if (signInUser.message) {
yield put(showAuthMessage(signInUser.message));
} else {
localStorage.setItem('user_id', signInUser.user.uid);
yield put(userSignInSuccess(signInUser.user.uid));
}
} catch (error) {
yield put(showAuthMessage(error));
}
}
function* signOut() {
try {
const signOutUser = yield call(signOutRequest);
if (signOutUser === undefined) {
localStorage.removeItem('user_id');
yield put(userSignOutSuccess(signOutUser));
} else {
yield put(showAuthMessage(signOutUser.message));
}
} catch (error) {
yield put(showAuthMessage(error));
}
}
export function* createUserAccount() {
yield takeEvery(SIGNUP_USER, createUserWithUsernamePassword);
}
export function* signInUser() {
yield takeEvery(SIGNIN_USER, signInUserWithUsernamePassword);
}
export function* signOutUser() {
yield takeEvery(SIGNOUT_USER, signOut);
}
export default function* rootSaga() {
yield all([
fork(signInUser),
fork(createUserAccount),
fork(signOutUser)
]);
}
这是执行api异步查询的文件:
backend.js
import axios from 'axios';
const backendServer = 'http://localhost:8000/';
const signInEndpoint = backendServer + 'api/token_auth/';
const signInWithUsernameAndPassword = (username, password) => {
axios.post(backendServer+"api/token_auth/", {
username: username,
password: password
})
.then(Response => {
console.log('Response: '+Response)
return Response;
})
.catch(Error => Error);
}
export const auth = {
signInWithUsernameAndPassword: signInWithUsernameAndPassword
}
ajax通过axios执行得很好,backend.js
中的console.log()
,但是backendAuth
中的console.log()
没有,控制台中出现以下错误:
index.js:1375不变冲突:对象作为React子对象无效(找到:TypeError:无法读取未定义的属性“then”)。如果要呈现子对象集合,请改用数组。
我相信问题在于我在
backend.js
的ajax中定义值的返回的方式,但我对前端开发还很陌生,所以我不确定。根本原因是一个简单的解决方案-您正在使用带有用户名和密码的符号体的显式块箭头函数,因此需要使用显式返回。由于没有return
语句,该函数返回undefined
,这会导致整体问题
快速修复只是将函数更新为:
const signInWithUsernameAndPassword = (username, password) => {
return axios.post(backendServer+"api/token_auth/", {
username: username,
password: password
})
.then(Response => {
console.log('Response: '+Response)
return Response;
})
.catch(Error => Error);
}
现在要了解您目前看到的最后一个错误:由于使用用户名和密码登录
返回未定义
,由于调用undefined
的类型错误,您最终在backendAuth.js
中输入catch
块的SignInWithUsernamePasswordRequest
。catch
块中的错误是一个error
实例,而不是一个普通字符串。我假设您随后在react组件树中的某个位置显示传递给showAuthError
的error
,但是error
实例不是可以有效渲染的对象。您可以尝试首先对其调用toString()
,以显示将来的错误,而不是导致渲染错误