为什么删除方法不更新列表？

Question

使用 VueJS、Vuex 和 MongoDB 的 Working Todo 应用程序，在删除任务后，我的列表不会在没有刷新页面的情况下更新。我已经在等待列表更新的 promise 中添加了一个 dispatch GET_TASK，但是它不起作用，而且似乎这个 promise 甚至没有执行。

<template>
    <div class="flex-col mx-auto mt-10 min-w-max font-sans text-xl" style="width:512px">
        <ul class="space-y-2">
            <li class="flex justify-between px-4 min-h-full" v-for="task in tasks" :key="task.id">
                {{task.task}} 
                <button @click="deletetodo(task._id)" class="text-xs border-2 px-4 focus:outline-none hover:bg-blue-200 hover:text-white rounded-full">Delete</button>    
             </li>
        </ul>
    </div>
</template>

<script>
export default {
    name:"ListToDo",
    computed:{
        tasks: function(){
            return this.$store.state.task
        }
    },
    methods:{
        async getlisttodo(){
            await this.$store.dispatch("GET_TASK")
        },
        async deletetodo(id){
            await this.$store.dispatch("DELETE_TASK",{'id':id})
            .then(response => {
                this.$store.dispatch("GET_TASK")
                console.log(response);
            })
            .catch(error => console.log(`DeleteTodo ${error}`))
        }
    },
    mounted(){
        this.getlisttodo()
    }
}
</script>

Vuex：

   actions: {
        async GET_TASK({ commit }) {
            const rawResponse = await fetch('http://localhost:3000/tasks')
            const content = await rawResponse.json();
            commit("SET_TASK", content)
        },

        async SAVE_TASK({ commit }, object) {
            const rawResponse = await fetch('http://localhost:3000/save', {
                method: 'POST',
                headers: {
                    'Accept': 'application/json',
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({ 'task': object })
            });
            const content = await rawResponse.json();
            commit("SET_MESSAGE", content)
        },

        async DELETE_TASK({ commit }, obj) {
            const id = obj['id']
            const raw = await fetch(`http://localhost:3000/delete/${id}`, {
                method: 'POST',
                headers: {
                    'Accept': 'application/json',
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({ 'id': id })
            });
            const content = await raw.json();
            commit("SET_MESSAGE", content)
        }
    }

Answer 1

只是浏览一下，您似乎正在等待一个异步方法并且也在执行 .then。如果您正在等待一个方法，那么该任务将等待直到它完成承诺，然后再转到下一行。 (more info on async/await here)

我也不确定当你发送“DELETE_TASK”时是否返回响应。我看到在该方法中调用了“SET_MESSAGE”。你可以随时查看我的console.logging。如果是这种情况，请尝试如下更改删除待办事项方法

async deletetodo(id){
           
           try{
           let response = await this.$store.dispatch("DELETE_TASK",{'id':id});
           this.$store.dispatch("GET_TASK");
                console.log(response);
            }
            catch(error){
            console.log(`DeleteTodo ${error}`)
            }
        }

编码愉快！

Answer 2

我必须通过添加 DELETE METHOD

来解决这个问题

vuex:

async DELETE_TASK({ commit }, obj) {
    try {
        const id = obj['id']
        const raw = await fetch(`http://localhost:3000/delete/${id}`, {
            method: 'DELETE',
            headers: {
                'Accept': 'application/json',
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ 'id': id })
        });
        const content = await raw.json();
        commit("SET_MESSAGE", content)
    } catch (error) {
        console.log(`DELETE_TASK ${error}`)
    }
}

server.js

app.delete('/delete/:id', async(req, res) => {
    try {
        const id = req.body.id;
        TodoTask.findByIdAndDelete(id, err => {
            if (err) return res.send(500, err);
            res.send({ 'status': 200, "mensagem": 'Tarefa deletada' })
        })
    } catch (error) {
        console.log(`Error Delete ${error}`)
    }
})

ListTodo.vue

methods:{        
    async deletetodo(id){
        try{
            await this.$store.dispatch("DELETE_TASK",{'id':id})
            .then(response => {
                this.$store.dispatch("GET_TASK");
                console.log(response);
            }) 
            .catch(error => console.log(error))
        }catch(error){
            console.log(`DeleteTodo ${error}`);
        }
    }
}

为什么删除方法不更新列表？

Why does delete method not updated the list?

mongodb

vue.js

vuex