Javascript 正在调用但未命中的操作

我正在使用MERN stack和redux，我创建了一个findOneAndUpdate api，并在Postman上进行了测试。所有的工作，因为它应该，但我不能让它在我的网站上工作。它实际上从未点击updateSubject操作。我传递的数据有误吗？有人知道我错过了什么吗

行动

export const updateSubject = (id, rate, noOfVotes, rating) => (dispatch) => {
  console.log("updateSubject hitting");
  fetch(`/api/subjects/Subject/${id}/${rate}/${noOfVotes}/${rating}`)
    .then((res) => res.json())
    .then((subject) =>
      dispatch({
        type: UPDATE_SUBJECT,
        subjects: subject,
      })
    );
};

原料药

组成部分

import React, { Component } from "react";
import PropTypes from "prop-types";
import GoogleSearch from "./GoogleSearch";
import { connect } from "react-redux";
import { fetchSubjects } from "../../actions/subject";
import { fetchComments } from "../../actions/comment";
import { updateSubject } from "../../actions/subject";

class Subject extends Component {
  // on loading the subjects and comments
  // are fetched from the database
  componentDidMount() {
    this.props.fetchSubjects();
    this.props.fetchComments();
  }

  constructor(props) {
    super(props);
    this.state = {
      // set inital state for subjects description
      // and summary to invisible
      viewDesription: -1,
      viewSummary: -1,
      comments: [],
    };
  }

  componentWillReceiveProps(nextProps) {
    // new subject and comments are added to the top
    if (nextProps.newPost) {
      this.props.subjects.unshift(nextProps.newPost);
    }
    if (nextProps.newPost) {
      this.props.comments.unshift(nextProps.newPost);
    }
  }

  clickHandler = (id) => {
    // when a subject title is clicked pass in its id
    // and make the desciption visible
    const { viewDescription } = this.state;
    this.setState({ viewDescription: viewDescription === id ? -1 : id });
    // add relevant comments to the state
    var i;
    var temp = [];
    for (i = 0; i < this.props.comments.length; i++) {
      if (this.props.comments[i].subject === id) {
        temp.unshift(this.props.comments[i]);
      }
    }
    this.setState({
      comments: temp,
    });
    // save the subject id to local storage
    // this is done incase a new comment is added
    // then the subject associated  with it can be retrieved
    // and added as a property of that comment
    localStorage.setItem("passedSubject", id);
  };

  // hovering on and off subjects toggles the visibility of the summary
  hoverHandler = (id) => {
    this.setState({ viewSummary: id });
  };
  hoverOffHandler = () => {
    this.setState({ viewSummary: -1 });
  };

  rateHandler = (id, rate) => {
    var currRate;
    var currVotes;
    var i;
    for (i = 0; i < this.props.subjects.length; i++) {
      if (this.props.subjects[i]._id === id) {
        currRate = this.props.subjects[i].rating;
        currVotes = this.props.subjects[i].noOfVotes;
      }
    }
    updateSubject(id, rate, currVotes, currRate);
    console.log(id, rate, currVotes, currRate);
  };

  findAuthor(id) {
    // search users for id return name
  }

  render() {
    const subjectItems = this.props.subjects.map((subject) => {
      // if the state equals the id set to visible if not set to invisible
      var view = this.state.viewDescription === subject._id ? "" : "none";
      var hover = this.state.viewSummary === subject._id ? "" : "none";
      var comments = this.state.comments;
      return (
        <div key={subject._id}>
          <div
            className="subjectTitle"
            onClick={() => this.clickHandler(subject._id)}
            onMouseEnter={() => this.hoverHandler(subject._id)}
            onMouseLeave={() => this.hoverOffHandler()}
          >
            <p className="title">{subject.title}</p>
            <p className="rate">
              Rate this subject:
              <button onClick={() => this.rateHandler(subject._id, 1)}>
                1
              </button>
              <button onClick={() => this.rateHandler(subject._id, 2)}>
                2
              </button>
              <button onClick={() => this.rateHandler(subject._id, 3)}>
                3
              </button>
              <button onClick={() => this.rateHandler(subject._id, 4)}>
                4
              </button>
              <button onClick={() => this.rateHandler(subject._id, 5)}>
                5
              </button>
            </p>
            <p className="rating">
              Rating: {(subject.rating / subject.noOfVotes).toFixed(1)}/5
            </p>
            <p className="summary" style={{ display: hover }}>
              {subject.summary}
            </p>
          </div>

          <div className="subjectBody " style={{ display: view }}>
            <div className="subjectAuthor">
              <p className="author" style={{ fontWeight: "bold" }}>
                Subject created by: {subject.author} on {subject.date}
              </p>
            </div>

            <div className="subjectDescription">
              <p className="description">{subject.description}</p>
            </div>

            <div className="subjectLinks">Links:</div>

            <div className="subjectComments">
              <p style={{ fontWeight: "bold" }}>Comments:</p>
              {comments.map((comment, i) => {
                return (
                  <div key={i} className="singleComment">
                    <p>
                      {comment.title}
                      <br />
                      {comment.comment}
                      <br />
                      Comment by : {comment.author}
                    </p>
                  </div>
                );
              })}
              <a href="/addcomment">
                <div className="buttonAddComment">ADD COMMENT</div>
              </a>
            </div>
          </div>
        </div>
      );
    });

    return (
      <div id="Subject">
        <GoogleSearch />
        {subjectItems}
      </div>
    );
  }
}

Subject.propTypes = {
  fetchSubjects: PropTypes.func.isRequired,
  fetchComments: PropTypes.func.isRequired,
  subjects: PropTypes.array.isRequired,
  comments: PropTypes.array.isRequired,
  newPost: PropTypes.object,
};

const mapStateToProps = (state) => ({
  subjects: state.subjects.items,
  newSubject: state.subjects.item,
  comments: state.comments.items,
  newComment: state.comments.item,
});

// export default Subject;
export default connect(mapStateToProps, { fetchSubjects, fetchComments })(
  Subject,
  Comment
);

import React，{Component}来自“React”；
从“道具类型”导入道具类型；
从“/GoogleSearch”导入GoogleSearch；
从“react redux”导入{connect}；
从“../../actions/subject”导入{fetchSubjects}”；
从“../../actions/comment”导入{fetchComments}；
从“../../actions/subject”导入{updateSubject}”；
类主题扩展组件{
//关于加载主题和注释
//是从数据库中提取的
componentDidMount（）{
this.props.fetchSubjects（）；
this.props.fetchComments（）；
}
建造师（道具）{
超级（道具）；
此.state={
//设置主题描述的初始状态
//并对其进行了总结
视图描述：-1，
视图摘要：-1，
评论：[]，
};
}
组件将接收道具（下一步）{
//新主题和评论添加到顶部
如果（nextrops.newPost）{
this.props.subjects.unshift（nextrops.newPost）；
}
如果（nextrops.newPost）{
this.props.comments.unshift（nextrops.newPost）；
}
}
clickHandler=（id）=>{
//单击主题标题时，传入其id
//并使描述可见
const{viewsdescription}=this.state；
this.setState（{viewscription:viewscription==id？-1:id}）；
//向州政府添加相关评论
var i；
var-temp=[]；
对于（i=0；i{
this.setState（{viewSummary:id}）；
};
hoverOffHandler=（）=>{
this.setState（{viewSummary:-1}）；
};
rateHandler=（id，rate）=>{
货币汇率；
无表决权；
var i；
对于（i=0；i{
//如果状态等于设置为可见（如果未设置为不可见）的id
var view=this.state.viewsdescription==subject.\u id？“：“无”；
var hover=this.state.viewSummary==subject.\u id？“：“无”；
var注释=this.state.comments；
返回(
this.clickHandler（subject.\u id）}
onMouseCenter={（）=>this.hoverHandler（subject.\u id）}
onMouseLeave={（）=>this.hoverOffHandler（）}
>
{subject.title}

对该主题进行评分：
this.rateHandler（subject.\u id，1）}>
1.
this.rateHandler（subject.\u id，2）}>
2.
this.rateHandler（subject.\u id，3）}>
3.
this.rateHandler（subject.\u id，4）}>
4.
this.rateHandler（subject.\u id，5）}>
5.


评级：{（subject.Rating/subject.noOfVotes.toFixed（1）}/5


{主题摘要}


主题创建人：{Subject.author}在{Subject.date}

{subject.description}
链接：
注释：
{comments.map（（comment，i）=>{
返回(

{comment.title}


{comment.comment}


评论人：{Comment.author}

);
})}
);
});
返回(
{subjectItems}
);
}
}
Subject.propTypes={
fetchSubjects:PropTypes.func.isRequired，
fetchComments:PropTypes.func.isRequired，
主题：PropTypes.array.isRequired，
注释：需要PropTypes.array.isRequired，
newPost:PropTypes.object，
};
常量mapStateToProps=（状态）=>({
主题：state.subjects.items，
newSubject:state.subjects.item，
注释：state.comments.items，
新成员：state.comments.item，
});
//导出默认主题；
导出默认连接（MapStateTops，{fetchSubjects，fetchComments}）(
主题,，
评论
);

您没有将

updateSubject

附加到组件本身，目前您只有

fetchsubject

和

fetchComments

因此，您需要更改连接函数，如下所示：

export default connect(mapStateToProps, { fetchSubjects, fetchComments, updateSubject })(
  Subject,
  Comment
);

然后您的调用函数可以更改如下：

rateHandler = (id, rate) => {
  const subject = this.props.subjects.find( subject => subject._id === id);
  // when no subject was found, the updateSubject won't be called
  subject && this.props.updateSubject( id, rate, subject.noOfVotes, subject.rating );
};

这也意味着你应该更新你的信息

rateHandler = (id, rate) => {
  const subject = this.props.subjects.find( subject => subject._id === id);
  // when no subject was found, the updateSubject won't be called
  subject && this.props.updateSubject( id, rate, subject.noOfVotes, subject.rating );
};

Subject.propTypes = {
  fetchSubjects: PropTypes.func.isRequired,
  fetchComments: PropTypes.func.isRequired,
  updateSubject: PropTypes.func.isRequired,
  subjects: PropTypes.array.isRequired,
  comments: PropTypes.array.isRequired,
  newPost: PropTypes.object,
};

export const updateSubject = (id, rate, noOfVotes, rating) => (dispatch) => {
  console.log("updateSubject hitting");
  fetch(`/api/subjects/Subject/${id}/${rate}/${noOfVotes}/${rating}`, { method: 'PUT' })
    .then((res) => res.json())
    .then((subject) =>
      dispatch({
        type: UPDATE_SUBJECT,
        subjects: subject,
      })
    );
};