我刚刚使用Axios调用API创建了laravel Vuejs项目。 Get Api运行良好，但是当我要发布数据时，出现内部服务器错误。 我正在使用Resourse作为控制器。 我只是创建Api并以此获取数据：

axios.get("http://localhost:8080/vuelaravel/tasks")
         .then(response =>{this.tasks = response.data})
         .catch(error => console.log(error.response));

vuelaravel是我的项目名称。 它运作良好。但是，当我尝试将数据发布到数据库中时，它显示了500个内部错误。

Here is my controller:
<?php

namespace App\Http\Controllers;

use App\Todo;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

class TodoController extends Controller
{

    public function index()
    {

        $tasks=Todo::orderBy('id','desc')->paginate(2);
        return request()->json(200,$tasks);
    }

    public function create()
    {
        //
    }

    public function store(Request $request)
    {
        $todo=Todo::create($request->all());

        if($todo){
            $tasks=Todo::orderBy('id','desc')->paginate(2);
            return request()->json(200,$tasks);
        }

    }

    public function show(Todo $todo)
    {
        //
    }

    public function edit(Todo $todo)
    {
        //
    }


    public function update(Request $request,Todo $todo)
    {
        //
    }


    public function destroy(Todo $todo)
    {
        //
    }
}

还有我的ADD.Vue

<template>
<div>


    <div class="modal fade" id="add" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
                <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                <span aria-hidden="true">&times;</span>
                </button>
            </div>
            <div class="modal-body">

                <input type="text" name="name" v-model="name" id="name" placeholder="Title Name" class="form-control" >
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary" @click="addRecord">Save changes</button>
            </div>
            </div>
        </div>
    </div>
</div>
</template>

<script>
export default {
    data(){
        return{
            name:'',}
    },methods:{
        addRecord(){
            axios.post("http://localhost:8080/vuelaravel/tasks",{
                'name': this.name,})
            .then(data => console.log(data))
            .catch(error => console.log(error))

        }
    }

}
</script>
<style scoped>

</style>

这是错误：

app.js:285 POST http://localhost:8080/vuelaravel/tasks 500 (Internal Server Error)

    at createError (app.js:699)
    at settle (app.js:960)
    at XMLHttpRequest.handleLoad (app.js:168)

我在Welcome.blade.php中使用我的csrf

        <meta name="csrf-token" content="{{csrf_token()}}">

通过This Api获取我的数据：

    created(){

         axios.get("http://localhost:8080/vuelaravel/tasks")
         .then(response =>{this.tasks = response.data})
         .catch(error => console.log(error.response));
    }