反应登录注册表单发送空数据

Question

我有一个带有 node 和 express 的后端设置，前端是 React + Redux

后端运行良好。我用 insomina 测试了这一切，我可以成功注册用户并登录。

在前端，一切看起来都很好，除了当我尝试登录或注册用户时，它告诉我输入字段是必需的，这意味着它向我的后端发送了一个空对象.我还在控制台中收到一条消息，说 componentWillReceiveProps(nextProps) 已被弃用，建议改用 getDerivedStateFromProps。问题是我是 React 的新手，不知道如何转换该块。有人可以告诉我吗？这就是表单发送空对象的原因吗？

编辑：为完整代码添加了 github 回购

https://github.com/onidemon/wh-evcharge

Register.js 在下面，登录和注册都有一个 componentWillReceiveProps 块，我认为这可能是导致问题的原因。不知道如何将它们转换为 getDerivedStateFromProps 如果这甚至是问题的原因。

import React, { Component } from "react";
import { Link, withRouter } from "react-router-dom";
import PropTypes from "prop-types";
import { connect } from "react-redux";
import { registerUser } from "../../actions/authActions";
import classnames from "classnames";

class Register extends Component {
  constructor() {
    super();
    this.state = {
      name: "",
      email: "",
      password: "",
      password2: "",
      errors: {}
    };
  }

  componentDidMount() {
    // If logged in and user navigates to Register page, should redirect them to dashboard
    if (this.props.auth.isAuthenticated) {
      this.props.history.push("/dashboard");
    }
  }

  componentWillReceiveProps(nextProps) {
    if (nextProps.errors) {
      this.setState({
        errors: nextProps.errors
      });
    }
  }

  onChange = e => {
    this.setState({ [e.target.id]: e.target.value });
  };

  onSubmit = e => {
    e.preventDefault();

    const newUser = {
      name: this.state.name,
      email: this.state.email,
      password: this.state.password,
      password2: this.state.password2
    };

    this.props.registerUser(newUser, this.props.history);
  };

  render() {
    const { errors } = this.state;

    return (
      <div className="container">
        <div className="row">
          <div className="col s8 offset-s2">
            <Link to="/" className="btn-flat waves-effect">
              <i className="material-icons left">keyboard_backspace</i> Back to
              home
            </Link>
            <div className="col s12" style={{ paddingLeft: "11.250px" }}>
              <h4>
                <b>Register</b> below
              </h4>
              <p className="grey-text text-darken-1">
                Already have an account? <Link to="/login">Log in</Link>
              </p>
            </div>
            <form noValidate onSubmit={this.onSubmit}>
              <div className="input-field col s12">
                <input
                  onChange={this.onChange}
                  value={this.state.name}
                  error={errors.name}
                  id="name"
                  type="text"
                  className={classnames("", {
                    invalid: errors.name
                  })}
                />
                <label htmlFor="name">Name</label>
                <span className="red-text">{errors.name}</span>
              </div>
              <div className="input-field col s12">
                <input
                  onChange={this.onChange}
                  value={this.state.email}
                  error={errors.email}
                  id="email"
                  type="email"
                  className={classnames("", {
                    invalid: errors.email
                  })}
                />
                <label htmlFor="email">Email</label>
                <span className="red-text">{errors.email}</span>
              </div>
              <div className="input-field col s12">
                <input
                  onChange={this.onChange}
                  value={this.state.password}
                  error={errors.password}
                  id="password"
                  type="password"
                  className={classnames("", {
                    invalid: errors.password
                  })}
                />
                <label htmlFor="password">Password</label>
                <span className="red-text">{errors.password}</span>
              </div>
              <div className="input-field col s12">
                <input
                  onChange={this.onChange}
                  value={this.state.password2}
                  error={errors.password2}
                  id="password2"
                  type="password"
                  className={classnames("", {
                    invalid: errors.password2
                  })}
                />
                <label htmlFor="password2">Confirm Password</label>
                <span className="red-text">{errors.password2}</span>
              </div>
              <div className="col s12" style={{ paddingLeft: "11.250px" }}>
                <button
                  style={{
                    width: "150px",
                    borderRadius: "3px",
                    letterSpacing: "1.5px",
                    marginTop: "1rem"
                  }}
                  type="submit"
                  className="btn btn-large waves-effect waves-light hoverable blue accent-3"
                >
                  Sign up
                </button>
              </div>
            </form>
          </div>
        </div>
      </div>
    );
  }
}

Register.propTypes = {
  registerUser: PropTypes.func.isRequired,
  auth: PropTypes.object.isRequired,
  errors: PropTypes.object.isRequired
};

const mapStateToProps = state => ({
  auth: state.auth,
  errors: state.errors
});

export default connect(
  mapStateToProps,
  { registerUser }
)(withRouter(Register));

Login.js低于

import React, { Component } from "react";
import { Link } from "react-router-dom";
import PropTypes from "prop-types";
import { connect } from "react-redux";
import { loginUser } from "../../actions/authActions";
import classnames from "classnames";

class Login extends Component {
  constructor() {
    super();
    this.state = {
      email: "",
      password: "",
      errors: {}
    };
  }

  componentDidMount() {
    // If logged in and user navigates to Login page, should redirect them to dashboard
    if (this.props.auth.isAuthenticated) {
      this.props.history.push("/dashboard");
    }
  }

  componentWillReceiveProps(nextProps) {
    if (nextProps.auth.isAuthenticated) {
      this.props.history.push("/dashboard");
    }

    if (nextProps.errors) {
      this.setState({
        errors: nextProps.errors
      });
    }
  }

  onChange = e => {
    this.setState({ [e.target.id]: e.target.value });
  };

  onSubmit = e => {
    e.preventDefault();

    const userData = {
      email: this.state.email,
      password: this.state.password
    };

    this.props.loginUser(userData);
  };

  render() {
    const { errors } = this.state;

    return (
      <div className="container">
        <div style={{ marginTop: "4rem" }} className="row">
          <div className="col s8 offset-s2">
            <Link to="/" className="btn-flat waves-effect">
              <i className="material-icons left">keyboard_backspace</i> Back to
              home
            </Link>
            <div className="col s12" style={{ paddingLeft: "11.250px" }}>
              <h4>
                <b>Login</b> below
              </h4>
              <p className="grey-text text-darken-1">
                Don't have an account? <Link to="/register">Register</Link>
              </p>
            </div>
            <form noValidate onSubmit={this.onSubmit}>
              <div className="input-field col s12">
                <input
                  onChange={this.onChange}
                  value={this.state.email}
                  error={errors.email}
                  id="email"
                  type="email"
                  className={classnames("", {
                    invalid: errors.email || errors.emailnotfound
                  })}
                />
                <label htmlFor="email">Email</label>
                <span className="red-text">
                  {errors.email}
                  {errors.emailnotfound}
                </span>
              </div>
              <div className="input-field col s12">
                <input
                  onChange={this.onChange}
                  value={this.state.password}
                  error={errors.password}
                  id="password"
                  type="password"
                  className={classnames("", {
                    invalid: errors.password || errors.passwordincorrect
                  })}
                />
                <label htmlFor="password">Password</label>
                <span className="red-text">
                  {errors.password}
                  {errors.passwordincorrect}
                </span>
              </div>
              <div className="col s12" style={{ paddingLeft: "11.250px" }}>
                <button
                  style={{
                    width: "150px",
                    borderRadius: "3px",
                    letterSpacing: "1.5px",
                    marginTop: "1rem"
                  }}
                  type="submit"
                  className="btn btn-large waves-effect waves-light hoverable blue accent-3"
                >
                  Login
                </button>
              </div>
            </form>
          </div>
        </div>
      </div>
    );
  }
}

Login.propTypes = {
  loginUser: PropTypes.func.isRequired,
  auth: PropTypes.object.isRequired,
  errors: PropTypes.object.isRequired
};

const mapStateToProps = state => ({
  auth: state.auth,
  errors: state.errors
});

export default connect(
  mapStateToProps,
  { loginUser }
)(Login);

编辑：添加了 AuthActions.js

import axios from "axios";
import setAuthToken from "../utils/setAuthToken";
import jwt_decode from "jwt-decode";

import { GET_ERRORS, SET_CURRENT_USER, USER_LOADING } 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

      // Set token to localStorage
      const { token } = res.data;
      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
  };
};

// User loading
export const setUserLoading = () => {
  return {
    type: USER_LOADING
  };
};

// Log user out
export const logoutUser = () => dispatch => {
  // Remove token from local storage
  localStorage.removeItem("jwtToken");
  // Remove auth header for future requests
  setAuthToken(false);
  // Set current user to empty object {} which will set isAuthenticated to false
  dispatch(setCurrentUser({}));
};

Answer 1

我查看了您的 github 项目。如果我没记错的话，我还没有看到您在服务器中使用 bodyparser.json() 函数。您只使用 bodyParser.urlencoded()，它将 url 参数转换为可处理的对象。还要添加 bodyParser.json()，那么您也可以从请求正文中获取传入数据。那我相信你应该拥有它。

反应登录注册表单发送空数据

react login register form sends empty data

node.js

reactjs

redux

jwt

redux-form