Javascript 每次我尝试更新web应用程序中的配置文件时，都会收到此消息

我尝试创建带有react、redux和node的web应用程序，我可以在其中创建和编辑配置文件数据，我有一个功能控制这两种情况，所以当我创建它时工作正常，但当我编辑它时会给我一条错误消息，我多次检查代码，但我看不到问题

这是错误消息

  Proxy error: Could not proxy request /api/profile from localhost:3000 to http://localhost:5000/.
[1] See https://nodejs.org/api/errors.html#errors_common_system_errors for more information (ECONNRESET).
[1]
[1] Proxy error: Could not proxy request /api/profile from localhost:3000 to http://localhost:5000/.
[1] See https://nodejs.org/api/errors.html#errors_common_system_errors for more information (ECONNRESET).
[1]
[0] server started in port 5000
[0] MongoDB connected
[1] Compiled with warnings.
[1]
[1] ./src/components/profile-form/EditProfile.js
[1]   Line 48:6:  React Hook useEffect has missing dependencies: 'getCurrentProfile', 'profile.bio', 'profile.company', 'profile.githubusername', 'profile.location', 'profile.skills', 'profile.social', 'profile.status', and 'profile.website'. Either include them or remove the dependency array. If 'getCurrentProfile' changes too often, find the parent component that defines it and wrap that definition in useCallback  react-hooks/exhaustive-deps

这是我收到的第二条错误消息

(node:10664) UnhandledPromiseRejectionWarning: TypeError: skills.split is not a function
[0]     at D:\Algorarhim and data structure\social app new version\router\api\profile.js:77:36
[0]     at Layer.handle [as handle_request] (D:\Algorarhim and data structure\social app new version\node_modules\express\lib\router\layer.js:95:5)
[0]     at next (D:\Algorarhim and data structure\social app new version\node_modules\express\lib\router\route.js:137:13)
[0]     at middleware (D:\Algorarhim and data structure\social app new version\node_modules\express-validator\src\middlewares\check.js:15:13)
[0]     at processTicksAndRejections (internal/process/task_queues.js:97:5)
[0] (node:10664) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
[0] (node:10664) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

这是控制编辑和创建的功能

import axios from 'axios';
import { setAlerts } from './alert';
import { GET_PROFILE, PROFILE_ERROR } from './types';

// Create or Update profile

export const createProfile = (
  formData,
  history,
  edit = false
) => async dispatch => {
  try {
    const config = {
      headers: {
        'Content-Type': 'application/json'
      }
    };

    const res = await axios.post('/api/profile', formData, config);

    dispatch({
      type: GET_PROFILE,
      payload: res.data
    });

    dispatch(
      setAlerts(edit ? 'Profile Updated' : 'Profile Created', 'success')
    );

    if (!edit) {
      history.push('/dashboard');
    }
  } catch (err) {
    const errors = err.response.data.error;

    if (errors) {
      errors.forEach(error => dispatch(setAlerts(error.msg, 'danger')));
    }

    dispatch({
      type: PROFILE_ERROR,
      payload: { msg: err.response.statusText, status: err.response.status }
    });
  }
};

这是我尝试在其中使用此函数的组件

import React, { useState, Fragment, useEffect } from 'react';
import { withRouter, Link } from 'react-router-dom';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { createProfile, getCurrentProfile } from '../../actions/profile';
const EditProfile = ({
  profile: { profile, loading },
  createProfile,
  getCurrentProfile,
  history
}) => {
  const [formDate, setFormDate] = useState({
    company: '',
    website: '',
    location: '',
    status: '',
    skills: '',
    githubusername: '',
    bio: '',
    twitter: '',
    facebook: '',
    linkedin: '',
    youtube: '',
    instagram: ''
  });

  const [displaySocialInput, toggleSocialInput] = useState(false);

  useEffect(() => {
    getCurrentProfile();

    setFormDate({
      company: loading || !profile.company ? '' : profile.company,
      website: loading || !profile.website ? '' : profile.website,
      location: loading || !profile.location ? '' : profile.location,
      status: loading || !profile.status ? '' : profile.status,
      skills: loading || !profile.skills ? '' : profile.skills,
      githubusername:
        loading || !profile.githubusername ? '' : profile.githubusername,
      bio: loading || !profile.bio ? '' : profile.bio,
      twitter: loading || !profile.social ? '' : profile.social.twitter,
      facebook: loading || !profile.social ? '' : profile.social.facebook,
      linkedin: loading || !profile.social ? '' : profile.social.linkedin,
      youtube: loading || !profile.social ? '' : profile.social.youtube,
      instagram: loading || !profile.social ? '' : profile.social.instagram
    });
    // console.log(profile.company);
  }, [loading]);
  const {
    company,
    website,
    location,
    status,
    skills,
    githubusername,
    bio,
    twitter,
    facebook,
    linkedin,
    youtube,
    instagram
  } = formDate;

  const onChange = e =>
    setFormDate({ ...formDate, [e.target.name]: e.target.value });

  const onSubmit = e => {
    e.preventDefault();
    createProfile(formDate, history, true);
  };

  return (
    <Fragment>
      <h1 className='large text-primary'>Create Your Profile</h1>
      <p className='lead'>
        <i className='fas fa-user'></i> Let's get some information to make your
        profile stand out
      </p>
      <small>* = required field</small>
      <form className='form' onSubmit={e => onSubmit(e)}>
        <div className='form-group'>
          <select name='status' value={status} onChange={e => onChange(e)}>
            <option value='0'>* Select Professional Status</option>
            <option value='Developer'>Developer</option>
            <option value='Junior Developer'>Junior Developer</option>
            <option value='Senior Developer'>Senior Developer</option>
            <option value='Manager'>Manager</option>
            <option value='Student or Learning'>Student or Learning</option>
            <option value='Instructor'>Instructor or Teacher</option>
            <option value='Intern'>Intern</option>
            <option value='Other'>Other</option>
          </select>
          <small className='form-text'>
            Give us an idea of where you are at in your career
          </small>
        </div>
        <div className='form-group'>
          <input
            type='text'
            placeholder='Company'
            name='company'
            value={company}
            onChange={e => onChange(e)}
          />
          <small className='form-text'>
            Could be your own company or one you work for
          </small>
        </div>
        <div className='form-group'>
          <input
            type='text'
            placeholder='Website'
            name='website'
            value={website}
            onChange={e => onChange(e)}
          />
          <small className='form-text'>
            Could be your own or a company website
          </small>
        </div>
        <div className='form-group'>
          <input
            type='text'
            placeholder='Location'
            name='location'
            value={location}
            onChange={e => onChange(e)}
          />
          <small className='form-text'>
            City & state suggested (eg. Boston, MA)
          </small>
        </div>
        <div className='form-group'>
          <input
            type='text'
            placeholder='* Skills'
            name='skills'
            value={skills}
            onChange={e => onChange(e)}
          />
          <small className='form-text'>
            Please use comma separated values (eg. HTML,CSS,JavaScript,PHP)
          </small>
        </div>
        <div className='form-group'>
          <input
            type='text'
            placeholder='Github Username'
            name='githubusername'
            value={githubusername}
            onChange={e => onChange(e)}
          />
          <small className='form-text'>
            If you want your latest repos and a Github link, include your
            username
          </small>
        </div>
        <div className='form-group'>
          <textarea
            placeholder='A short bio of yourself'
            name='bio'
            value={bio}
            onChange={e => onChange(e)}
          />
          <small className='form-text'>Tell us a little about yourself</small>
        </div>

        <div className='my-2'>
          <button
            onClick={() => toggleSocialInput(!displaySocialInput)}
            type='button'
            className='btn btn-light'
          >
            Add Social Network Links
          </button>
          <span>Optional</span>
        </div>
        {displaySocialInput && (
          <Fragment>
            <div className='form-group social-input'>
              <i className='fab fa-twitter fa-2x'></i>
              <input
                type='text'
                placeholder='Twitter URL'
                name='twitter'
                value={twitter}
                onChange={e => onChange(e)}
              />
            </div>

            <div className='form-group social-input'>
              <i className='fab fa-facebook fa-2x'></i>
              <input
                type='text'
                placeholder='Facebook URL'
                name='facebook'
                value={facebook}
                onChange={e => onChange(e)}
              />
            </div>

            <div className='form-group social-input'>
              <i className='fab fa-youtube fa-2x'></i>
              <input
                type='text'
                placeholder='YouTube URL'
                name='youtube'
                value={youtube}
                onChange={e => onChange(e)}
              />
            </div>

            <div className='form-group social-input'>
              <i className='fab fa-linkedin fa-2x'></i>
              <input
                type='text'
                placeholder='Linkedin URL'
                name='linkedin'
                value={linkedin}
                onChange={e => onChange(e)}
              />
            </div>

            <div className='form-group social-input'>
              <i className='fab fa-instagram fa-2x'></i>
              <input
                type='text'
                placeholder='Instagram URL'
                name='instagram'
                value={instagram}
                onChange={e => onChange(e)}
              />
            </div>
          </Fragment>
        )}

        <input type='submit' className='btn btn-primary my-1' />
        <Link className='btn btn-light my-1' to='/dashboard'>
          Go Back
        </Link>
      </form>
    </Fragment>
  );
};

EditProfile.propTypes = {
  createProfile: PropTypes.func.isRequired,
  getCurrentProfile: PropTypes.func.isRequired,
  profile: PropTypes.object.isRequired
};

const mapStateToProps = state => ({
  profile: state.profile
});

export default connect(mapStateToProps, { createProfile, getCurrentProfile })(
  withRouter(EditProfile)
);

---

从我所看到的技能只是字符串，所以不能在字符串变量上进行映射（可以在数组上进行映射）。 试试这个：

if (skills) {
      profileField.skills = skills.split(',').trim();
    }

如果这不起作用，请在此行之前插入：

console.log(skills)

检查你得到的数据并在这里显示。

---

如果第一个选项不起作用，您向我发送console.log结果，我将在明天（大约8-9小时）尝试回答这个问题。

您必须将技能作为字符串插入，因为拆分函数可以将字符串拆分为拆分字符串的数组

a = "something, somethingelse, whatever" // that is correct
b = ["something", "somethingelse", "whatever"] // that gives error
c = []
const profileField = {};
console.log(profileField);

// Good result
profileField.skills = a.split(",").map(skills => skills.trim())

console.log(profileField.skills)
// result => [ 'something', 'somethingelse', 'whatever' ]



// TypeError result, comment to see good result
profileField.skills = b.split(",").map(skills => skills.trim())

console.log(profileField.skills)
// result => TypeError: b.split is not a function


// Bad result, Arrays cannot work with split function
// profileField.skills = c.split(",").map(skills => skills.trim())

// console.log(profileField.skills)

// to run node filename.js

---

我在我的模型技能中有这样的技能：{type:[String]，required:true}，这与创建配置文件相同，它工作良好，因此它如何在一个配置文件中工作，而在另一个配置文件中不工作，我制作了console.log，它为我提供了一系列技能。我知道它可以工作，但当我更新技能输入时，如删除或添加技能，但当我不更改它时，给我错误技能就像这样['redux'，'react'，'node']它以数组的形式出现，所以可能代码不起作用，因为它已经拆分，所以它给我错误，所以我想我需要一种方法来加入我的技能，再次成为一个字符串，以便正常工作，当我加入我的技能时，它从数据库返回，所以第一个技能以数组的形式返回，所以拆分给我错误，因为它已经拆分，所以我添加了join到我的代码，所以现在我的技能回来作为一个字符串，它的工作，谢谢Wiktor

a = "something, somethingelse, whatever" // that is correct
b = ["something", "somethingelse", "whatever"] // that gives error
c = []
const profileField = {};
console.log(profileField);

// Good result
profileField.skills = a.split(",").map(skills => skills.trim())

console.log(profileField.skills)
// result => [ 'something', 'somethingelse', 'whatever' ]



// TypeError result, comment to see good result
profileField.skills = b.split(",").map(skills => skills.trim())

console.log(profileField.skills)
// result => TypeError: b.split is not a function


// Bad result, Arrays cannot work with split function
// profileField.skills = c.split(",").map(skills => skills.trim())

// console.log(profileField.skills)

// to run node filename.js