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如何在react/mysql应用程序中编辑任务?_Mysql_Reactjs_Sql Update_Taskscheduler - Fatal编程技术网

如何在react/mysql应用程序中编辑任务?

如何在react/mysql应用程序中编辑任务?,mysql,reactjs,sql-update,taskscheduler,Mysql,Reactjs,Sql Update,Taskscheduler,所以我正在制作一个ToDo应用程序,但到目前为止,我只能创建一个任务,或者删除它。现在我正在尝试创建另一个功能,通过单击“编辑”按钮,我可以编辑特定任务,然后它会将任务更改为一个输入区域,我可以在其中编辑任务名称。有人能帮我吗?它现在的样子显示在下面 我现在的代码如下: import React, { Component } from 'react'; import axios from "axios"; export default class TaskInput extends Compo

所以我正在制作一个ToDo应用程序,但到目前为止,我只能创建一个任务,或者删除它。现在我正在尝试创建另一个功能,通过单击“编辑”按钮,我可以编辑特定任务,然后它会将任务更改为一个输入区域,我可以在其中编辑任务名称。有人能帮我吗?它现在的样子显示在下面

我现在的代码如下:

import React, { Component } from 'react';
import axios from "axios";

export default class TaskInput extends Component {
    constructor(props) {
        super(props)

        this.state = {
            task: " ",
            allTasks: [],
            strikeThrough: {textDecoration:""}
        }
    }

    changeHandler = (event) => {
        console.log(event.target.value)
        this.setState({
            task: event.target.value,
        })
    }

    handleStrikethrough = (completed, id) => {
    //    !completed ? this.setState({strikeThrough:{textDecoration: "line-through"}})  : this.setState({strikeThrough:{textDecoration:""}})
            // if (!completed) {
            //     console.log("not completed", !completed)
            //     this.setState({strikeThrough:{textDecoration: "line-through"}});
            //     axios.put("/api/task", {
            //         completed: !completed
            //     }, id).then(response => console.log(response))
            // } else {
            //     this.setState({strikeThrough:{textDecoration:""}})
            //     axios.put("/api/task", {
            //         completed: !completed
            //     }, id).then(response => console.log(response))
            // }
    }

    handleDelete = (taskId) => {
        axios.delete("/api/task/" + taskId).then(data => {
            console.log("You deleted the task with an id of ", data)
        })
        window.location.reload();
    }

    handleTaskEdit = () => {
        console.log("edit button worked")
    }

    submitHandler = (event) => {
        event.preventDefault() //to prevent page refresh
        console.log()

        fetch("/api/task", {
            method: "POST",
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json'
            },
            body: JSON.stringify(this.state),

        })
            .then(res => res.json())
            .then(data => console.log(data))
            .catch(err => console.log(err))
        this.setState({
            task: ""
        })
        window.location.reload()
    }

    componentDidMount() {
        console.log("component did mount")

        const self = this;
        axios.get("/api/tasks").then(function (data) {
            self.setState({
                allTasks: data.data
            })
            // console.log(self.state.allTasks[0].task)
        })
    }

    render() {
        const {strikeThrough, task, allTasks} = this.state; //destructuring the state
        return (
            <div>
                <form onSubmit={this.submitHandler} >
                    <label style={{ margin: "5px 0px" }}>Create a Task:</label>
                    <input value={this.state.task} onChange={this.changeHandler} style={{ width: "100%" }}></input>
                    <input style={{ padding: "5px", marginTop: "5px" }} type="submit"></input>
                </form>
                <hr></hr>
                <br></br>
                <ul>
                    {this.state.allTasks.map(task => (
                        <li style={strikeThrough} onClick={()=>this.handleStrikethrough(task.completed, task.id)} className="tasks">{task.task}
                        <button onClick = {() => this.handleDelete(task.id)}>x</button>
                        <button onClick={this.handleTaskEdit}>edit</button>
                        </li>
                    )
                    )}
                </ul>
            </div>
        )
    }
}
import React,{Component}来自'React';
从“axios”导入axios;
导出默认类TaskInput扩展组件{
建造师(道具){
超级(道具)
此.state={
任务:“”,
所有任务:[],
删除线:{textDecoration:}
}
}
changeHandler=(事件)=>{
console.log(event.target.value)
这是我的国家({
任务:event.target.value,
})
}
handleStrikethrough=(已完成,id)=>{
//!已完成?this.setState({strikeThrough:{textDecoration:{linethrough}):this.setState({strikeThrough:{textDecoration:}})
//如果(!已完成){
//console.log(“未完成”,“已完成”)
//this.setState({strikeThrough:{textdecommunication:{line-through}});
//axios.put(“/api/task”{
//已完成:!已完成
//},id)。然后(response=>console.log(response))
//}其他{
//this.setState({删除线:{textDecoration:}})
//axios.put(“/api/task”{
//已完成:!已完成
//},id)。然后(response=>console.log(response))
// }
}
handleDelete=(任务ID)=>{
delete(“/api/task/”+taskId)。然后(数据=>{
log(“您删除了id为的任务”,data)
})
window.location.reload();
}
handleTaskEdit=()=>{
console.log(“编辑按钮工作”)
}
submitHandler=(事件)=>{
event.preventDefault()//防止页面刷新
console.log()
获取(“/api/task”{
方法:“张贴”,
标题:{
“内容类型”:“应用程序/json”,
“接受”:“应用程序/json”
},
正文:JSON.stringify(this.state),
})
.then(res=>res.json())
.then(数据=>console.log(数据))
.catch(err=>console.log(err))
这是我的国家({
任务:“
})
window.location.reload()
}
componentDidMount(){
log(“组件未装载”)
const self=这个;
get(“/api/tasks”).then(函数(数据){
自我状态({
所有任务:data.data
})
//console.log(self.state.allTasks[0].task)
})
}
render(){
const{strikeThrough,task,allTasks}=this.state;//分解状态
返回(
创建任务:



    {this.state.allTasks.map(task=>(
  • this.handleStrikethrough(task.completed,task.id)}className=“tasks”>{task.task} this.handleDelete(task.id)}>x 编辑
  • ) )}
) } }
您可以在其相应的编辑按钮上设置任务ID,然后单击编辑按钮时,使用ID获取任务并将该任务发送到编辑组件。

您可以在其相应的编辑按钮上设置任务ID,然后单击“编辑”按钮时,使用ID获取任务并将该任务发送到编辑组件。

首先,您可以将任务名称设置为任务属性,并设置可编辑任务的ID:

handleTaskEdit = id =>
  this.setState({ task: this.state.allTasks.find(el => el.id === id).task })
createTask = () => {
        fetch("/api/task", {
            method: "POST",
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json'
            },
            body: JSON.stringify({task: this.state.task}),

        })
            .then(res => res.json())
            .then(data => this.setState({
              task: '', 
              allTasks: [...this.state.allTasks, data]}))
            .catch(err => console.log(err))
}
updateTask = () => {
    fetch("/api/task", {
        method: "PATCH",
        headers: {
            'Content-Type': 'application/json',
            'Accept': 'application/json'
        },
        body: JSON.stringify({task: this.state.task, id: this.state.editableTaskId}),

    })
        .then(res => res.json())
        .then(data => this.setState({
          task: '',
          editableTaskId: null,
          allTasks: this.state.allTasks.map(el => 
          el.id === data.id ? data : el)})) // Or take new name and id from state
        .catch(err => console.log(err))
}
submitHandler = () => {
    if (this.state.editableTaskId) {
      this.updateTask();
    } else {
      this.createTask()
    }
}
handleDelete = (taskId) => {
    axios.delete("/api/task/" + taskId).then(data => {
      this.setState({allTasks: this.state.allTasks.filter(el =>
        el.id !== data.id
      )})
    })
}
其次,创建两个新方法,createTask和updateTask:

handleTaskEdit = id =>
  this.setState({ task: this.state.allTasks.find(el => el.id === id).task })
createTask = () => {
        fetch("/api/task", {
            method: "POST",
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json'
            },
            body: JSON.stringify({task: this.state.task}),

        })
            .then(res => res.json())
            .then(data => this.setState({
              task: '', 
              allTasks: [...this.state.allTasks, data]}))
            .catch(err => console.log(err))
}
updateTask = () => {
    fetch("/api/task", {
        method: "PATCH",
        headers: {
            'Content-Type': 'application/json',
            'Accept': 'application/json'
        },
        body: JSON.stringify({task: this.state.task, id: this.state.editableTaskId}),

    })
        .then(res => res.json())
        .then(data => this.setState({
          task: '',
          editableTaskId: null,
          allTasks: this.state.allTasks.map(el => 
          el.id === data.id ? data : el)})) // Or take new name and id from state
        .catch(err => console.log(err))
}
submitHandler = () => {
    if (this.state.editableTaskId) {
      this.updateTask();
    } else {
      this.createTask()
    }
}
handleDelete = (taskId) => {
    axios.delete("/api/task/" + taskId).then(data => {
      this.setState({allTasks: this.state.allTasks.filter(el =>
        el.id !== data.id
      )})
    })
}
最后,您需要更新submitHandler和handleDelete:

handleTaskEdit = id =>
  this.setState({ task: this.state.allTasks.find(el => el.id === id).task })
createTask = () => {
        fetch("/api/task", {
            method: "POST",
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json'
            },
            body: JSON.stringify({task: this.state.task}),

        })
            .then(res => res.json())
            .then(data => this.setState({
              task: '', 
              allTasks: [...this.state.allTasks, data]}))
            .catch(err => console.log(err))
}
updateTask = () => {
    fetch("/api/task", {
        method: "PATCH",
        headers: {
            'Content-Type': 'application/json',
            'Accept': 'application/json'
        },
        body: JSON.stringify({task: this.state.task, id: this.state.editableTaskId}),

    })
        .then(res => res.json())
        .then(data => this.setState({
          task: '',
          editableTaskId: null,
          allTasks: this.state.allTasks.map(el => 
          el.id === data.id ? data : el)})) // Or take new name and id from state
        .catch(err => console.log(err))
}
submitHandler = () => {
    if (this.state.editableTaskId) {
      this.updateTask();
    } else {
      this.createTask()
    }
}
handleDelete = (taskId) => {
    axios.delete("/api/task/" + taskId).then(data => {
      this.setState({allTasks: this.state.allTasks.filter(el =>
        el.id !== data.id
      )})
    })
}

首先,您可以将任务名称设置为任务属性,并设置可编辑任务的ID:

handleTaskEdit = id =>
  this.setState({ task: this.state.allTasks.find(el => el.id === id).task })
createTask = () => {
        fetch("/api/task", {
            method: "POST",
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json'
            },
            body: JSON.stringify({task: this.state.task}),

        })
            .then(res => res.json())
            .then(data => this.setState({
              task: '', 
              allTasks: [...this.state.allTasks, data]}))
            .catch(err => console.log(err))
}
updateTask = () => {
    fetch("/api/task", {
        method: "PATCH",
        headers: {
            'Content-Type': 'application/json',
            'Accept': 'application/json'
        },
        body: JSON.stringify({task: this.state.task, id: this.state.editableTaskId}),

    })
        .then(res => res.json())
        .then(data => this.setState({
          task: '',
          editableTaskId: null,
          allTasks: this.state.allTasks.map(el => 
          el.id === data.id ? data : el)})) // Or take new name and id from state
        .catch(err => console.log(err))
}
submitHandler = () => {
    if (this.state.editableTaskId) {
      this.updateTask();
    } else {
      this.createTask()
    }
}
handleDelete = (taskId) => {
    axios.delete("/api/task/" + taskId).then(data => {
      this.setState({allTasks: this.state.allTasks.filter(el =>
        el.id !== data.id
      )})
    })
}
其次,创建两个新方法,createTask和updateTask:

handleTaskEdit = id =>
  this.setState({ task: this.state.allTasks.find(el => el.id === id).task })
createTask = () => {
        fetch("/api/task", {
            method: "POST",
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json'
            },
            body: JSON.stringify({task: this.state.task}),

        })
            .then(res => res.json())
            .then(data => this.setState({
              task: '', 
              allTasks: [...this.state.allTasks, data]}))
            .catch(err => console.log(err))
}
updateTask = () => {
    fetch("/api/task", {
        method: "PATCH",
        headers: {
            'Content-Type': 'application/json',
            'Accept': 'application/json'
        },
        body: JSON.stringify({task: this.state.task, id: this.state.editableTaskId}),

    })
        .then(res => res.json())
        .then(data => this.setState({
          task: '',
          editableTaskId: null,
          allTasks: this.state.allTasks.map(el => 
          el.id === data.id ? data : el)})) // Or take new name and id from state
        .catch(err => console.log(err))
}
submitHandler = () => {
    if (this.state.editableTaskId) {
      this.updateTask();
    } else {
      this.createTask()
    }
}
handleDelete = (taskId) => {
    axios.delete("/api/task/" + taskId).then(data => {
      this.setState({allTasks: this.state.allTasks.filter(el =>
        el.id !== data.id
      )})
    })
}
最后,您需要更新submitHandler和handleDelete:

handleTaskEdit = id =>
  this.setState({ task: this.state.allTasks.find(el => el.id === id).task })
createTask = () => {
        fetch("/api/task", {
            method: "POST",
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json'
            },
            body: JSON.stringify({task: this.state.task}),

        })
            .then(res => res.json())
            .then(data => this.setState({
              task: '', 
              allTasks: [...this.state.allTasks, data]}))
            .catch(err => console.log(err))
}
updateTask = () => {
    fetch("/api/task", {
        method: "PATCH",
        headers: {
            'Content-Type': 'application/json',
            'Accept': 'application/json'
        },
        body: JSON.stringify({task: this.state.task, id: this.state.editableTaskId}),

    })
        .then(res => res.json())
        .then(data => this.setState({
          task: '',
          editableTaskId: null,
          allTasks: this.state.allTasks.map(el => 
          el.id === data.id ? data : el)})) // Or take new name and id from state
        .catch(err => console.log(err))
}
submitHandler = () => {
    if (this.state.editableTaskId) {
      this.updateTask();
    } else {
      this.createTask()
    }
}
handleDelete = (taskId) => {
    axios.delete("/api/task/" + taskId).then(data => {
      this.setState({allTasks: this.state.allTasks.filter(el =>
        el.id !== data.id
      )})
    })
}
方法如下:

使用名为
editTaskID
的状态变量,并将默认值保持为null。在“编辑”按钮上,设置
handleTaskEdit
的功能,以便将
editTaskID
设置为单击编辑按钮的特定任务ID

在渲染任务列表项的映射函数中,添加以下条件:

{this.state.allTasks.map(task =>
             (
               <li style={strikeThrough}
                 onClick={()=>this.handleStrikethrough(task.completed, task.id)} 
                 className="tasks">
                 {
                   this.editTaskID
                   ?<input 
                        value={this.state.editTaskName} 
                        /*supposing editTaskName to be state variable that stores 
                        the edit textfield content.*/ 
                        onChange={this.changeEditHandler} style={{ width: "80%" }}>
                    </input>
                  :task.task
                 }
               <button onClick = {() => this.handleDelete(task.id)}>x</button>
               <button onClick={this.handleTaskEdit}>edit</button>
              </li>
            )
           )
}
{this.state.allTasks.map(任务=>
(
  • this.handleStrikethrough(task.completed,task.id)} className=“任务”> { 这个是.editTaskID ? :task.task } this.handleDelete(task.id)}>x 编辑
  • ) ) }
    现在将检查在呈现时editTaskID是否已设置为null的条件。如果为空,则所有任务都将以纯文本的形式出现,否则将以文本框的形式出现。您还可以在
    allTasks[editTaskID]
    的帮助下,将该值添加到编辑任务输入字段中

    在编辑按钮的
    handleTaskEdit
    功能上,确保将
    allTasks[editTaskID]
    设置为值
    editTaskName
    ,并将状态变量
    editTaskID
    设置为空。 调用必要的后端端点reflec