vue-父子组件利用传参达到无限级评论

vue父子组件的使用

 

 

<template>
    <div>
        <zi :data="data" />
    </div>
</template>


<script>
import zi from './zi'
import axios from 'axios'

export default {
    name:"fuzujian",
    data() {
        return {
            data:''
        }
    },
    components:{
        zi
    },
    methods:{
        get_info(){
            axios.get("http://127.0.0.1:8000/comment/com/").then(res=>{
                var mytree = {"id":0,"content":""}
                mytree["childlist"] = res.data.data
                this.data= mytree
            })
        }
    },
    created(){
        this.get_info()
    }
}
</script>

fuzujian.vue
fuzujian.vue
<template>
    <div>
        
        <li>
            <ul >
                看数据后方可精神崩溃的解放后卡加斯那可就发你
            </ul>
        </li>
        
    </div>
</template>






<script>
export default {
    name:"zi"

}
</script>

<style>
    
ul{
    list-style: none;
    /* padding-left: 20px */
}

</style>
zi.vue

 

父组件给子组件传参

定义参数和方法

 

 

父组件给子组件传参

 

 

 

子组件引用父组件的参数和方法 

 

子组件接收父组件动态的值需要用watch监控

<template>
    <div>
        <input  type="button" value="给父组件传递值">
        <li>
            <ul v-for="i in num" :key="i.name">{{i.name}}
            </ul>
        </li>
        {{zi1}}
        {{zi2}}
        <!-- {{zi11}}
        {{zi22}} -->
    </div>

</template>



<script>
export default {
    name:"zi",
    props:["zi1","zi2"],
    data() {
        return {
            num : [{"name":"uzi"},{"name":"ming"},{"name":"xiaohu"},],
            // zi11 : zi1,
            // zi22 : zi2
        }
    },
    watch:{
        zi1(val){
            
        },
         zi2(val){
            
        }
    },
    methods: {
        
    },
    

}
</script>

<style>
    
ul{
    list-style: none;
    /* padding-left: 20px */
}

</style>
zi.vue
<template>
    <div>
        


        <zi :zi1="zi1" :zi2="zi2"></zi>

        <input type="button" @click="change_info()" value="改变">
    </div>
</template>


<script>

import zi from './zi'

export default {
    name:"fu",
    data() {
        return {
            data:[],
            zi1:12,
            zi2:34
        }
    },
    components:{
        zi
       
    },
    methods:{
        
        change_info(){
            this.zi1 = 100
            this.zi2 = 900
            console.log(this.zi1,this.zi2)
        },
        
    },
    
}
</script>
fu.vue

 

 

子组件上使用父组件传递的数据和方法

 

 

子组件给父组件传参

传递数据:子组件主要通过事件传递数据给父组件

  子组件定义一个方法,方法中通过this.$emit(‘transferNum’,this.num)方式发送数据num,父组件中监听transferNum事件,当事件触发时,执行函数,进行赋值。

  子组件的数据和发送数据方法:

 

 

   父组件中监听子组件中发送函数的方法,并赋值。

 

 

 

 

 

 

 

 

 

 

这样在父组件中就可以使用子组件中的num这个数据了。

 

   传递方法:子组件定义好方法,父组件在引用子组件的时候在自定义标签中添加标识符,ref=”child1”,用来表示这个子组件。父组件在methods中定义自己的方法名,方法主this.$refs.child1.fun。意思是通过调用$refs中名字叫child1的子组件里的fun方法,赋值给父组件。

  子组件定义方法:

 

 

 

   父组件中引用子组件时,添加一个标识符rel=’abc’,注意rel是语法,abc是标识

 

   父组件中定义一个方法,主体内容如图,表示方法就是标识为aaa的子组件里的setFun方法。

 

 

 

   调用gerFun方法

 

 

<template>
    <div>
        <input @click="setNum" type="button" value="给父组件传递值">
        <li>
            <ul v-for="i in num" :key="i.name">{{i.name}}
            
            </ul>
        </li>
    </div>
</template>



<script>
export default {
    name:"zizujian",
    props:["data"],
    data() {
        return {
            num : [{"name":"uzi"},{"name":"ming"},{"name":"xiaohu"},]
        }
    },
    methods: {
        setNum(){
            this.$emit('func',this.num)
        },
        setFunc(){
            alert("我最喜欢的选手是"+this.num[0]["name"] )
        }
    },
    

}
</script>

<style>
    
ul{
    list-style: none;
    /* padding-left: 20px */
}

</style>
zizujian.vue
<template>
    <div>
        
        <p @click="getFunc">peter的测试父组件</p>


        <zizujian @func="getNum"  ref="abc" ></zizujian>

        
    </div>
</template>


<script>

import zizujian from './zizujian'
import axios from 'axios'

export default {
    name:"showzi",
    data() {
        return {
            data:[]
        }
    },
    components:{
        zizujian
       
    },
    methods:{
        
        getNum(val){
            this.data=val
            console.log(val)
        },
        getFunc(val){
            this.$refs.abc.setFunc(val)
        }
    },
    
}
</script>
fuzujian.vue

 

 

利用父子组件实现无限级评论

<template>
    <div>
        <zi :data="data" />
        <!-- <zizujian :data="data" /> -->
    </div>
</template>


<script>
import zi from './zi'
import axios from 'axios'

export default {
    name:"fu",
    data() {
        return {
            data:''
        }
    },
    components:{
        zi
    },
    methods:{
        get_info(){
            axios.get("http://127.0.0.1:8000/comment/com/").then(res=>{
                var mytree = {"id":0,"content":""}
                mytree["childlist"] = res.data.data
                this.data= mytree
            })
        }
    },
    created(){
        this.get_info()
    }
}
</script>
fu.vue
<template>
    <div>
        <li>{{data.content}}
            <ul v-if="data.childlist && data.childlist.length>0">
            <zi v-for="i in data.childlist" :key="i.id" :data="i" />
            </ul>
        </li>
    </div>
</template>


<script>
export default {
    name:"zi",
    props:["data"]
}
</script>

<style>
    
ul{
    list-style: none;
    /* padding-left: 20px */
}

</style>
zi.vue
from django.shortcuts import render
from rest_framework.views import APIView
from rest_framework.response import Response
from .serializers import CommentSer
from .models import Comments
# Create your views here.



def change_comments(data):
    list = []
    tree = {}
    root = ''
    p_id = ''

    for i in data:
        #将data循环,然后加入一个dict中,key为每条数据的ID,val对应为整条数据
        tree[i["id"]] = i

        # print(tree)

    for i in data:
        print(i)
        if i["p_id"] == None:
            root = tree[i["id"]]  #i.di为tree里的key,将key对应的val取出
            list.append(root)
        else:
            p_id = i["p_id"]
            # 判断父级是否有孩子字段(childlist),如果有将当前数据加入,如果没有添加(childlist)后再加入
            if "childlist" not in tree[p_id]:
                tree[p_id]['childlist'] = []
            tree[p_id]["childlist"].append(tree[i["id"]])

    return list


class CommentView(APIView):

    def get(self,request):

        comments = Comments.objects.filter()

        comment_ser = CommentSer(comments,many=True)

        print(comment_ser.data)

        data={
            "code":200,
            "data":change_comments(comment_ser.data)
        }

        return Response(data,status=200)
views.py

 

posted @ 2020-08-05 16:18  小河逆袭变大海  阅读(287)  评论(0编辑  收藏  举报