一、创建模型

创建私信模型

php artisan make:model Message -m

修改生成的 database/migrations/create_messages_table.php

public function up()
{
    Schema::create('messages', function (Blueprint $table) {
        $table->increments('id');
        $table->unsignedInteger('from_user_id');
        $table->unsignedInteger('to_user_id');
        $table->text('content');
        $table->string('has_read',8)->default('F');
        $table->timestamp('read_at')->nullable();
        $table->timestamps();
    });
}

执行数据迁移

php artisan migrate

修改 app/Message.php

protected $table = 'message';

protected $fillable = ['from_user_id','to_user_id','content'];

public function fromUser()
{
    return $this->belongsTo(User::class,'from_user_id');
}

public function toUser()
{
    return $this->belongsTo(User::class,'to_user_id');
}

修改 app/User.php

public function messages()
{
    return $this->hasMany(Message::class,'to_user_id');
}

二、创建控制器

创建私信控制器

php artisan make:controller MessagesController

修改 routes/api.php

Route::post('/message/store', 'MessagesController@store')->middleware('auth:api');

新建文件：app/Repositories/MessageRepository.php

namespace App\Repositories;

use App\Message;

class MessageRepository
{
    public function create(array $attributes)
    {
        return Message::create($attributes);
    }
}

修改生成的控制器：app/Http/Controllers/MessagesController.php

namespace App\Http\Controllers;

use Auth;
use App\Repositories\MessageRepository;

class MessagesController extends Controller
{
    protected $messageRepository;

    public function __construct(MessageRepository $messageRepository)
    {
        $this->messageRepository = $messageRepository;
    }

    public function store()
    {
        $message = $this->messageRepository->create([
            'to_user_id' => request('user'),
            'from_user_id' => user('api')->id,
            'content' => request('content')
        ]);
        if($message){
            $status = true;
        }else{
            $status = false;
        }
        return response()->json(['status'=>$status]);
    }
}

三、创建视图

新建 resources/assets/js/components/SendMessage.vue

注册组件：修改 resources/assets/js/app.js

Vue.component('send-message', require('./components/SendMessage.vue'));

执行 gulp

gulp

修改 resources/views/questions/show.blade.php

访问：http://127.0.0.1:8000/questions/id，id 为问题 ID

点击按钮进行测试