怎么解决的，我也出现这个错误了

视频只能在mac上看吗，我换到mac上看 就有图像

无语了，只有声音，没视频图像

视频怎么不能看 ，只有声音呀

public function up()
    {
        Schema::create('roles', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('label')->nullable();
            $table->timestamps();
        });

        Schema::create('permissions', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('label')->nullable();
            $table->timestamps();
        });

        Schema::create('permission_role', function (Blueprint $table) {
            $table->integer('permission_id')->unsigned();
            $table->integer('role_id')->unsigned();

            $table->foreign('permission_id')
                ->references('id')
                ->on('permissions')
                ->onDelete('cascade');
            $table->foreign('role_id')
                ->references('id')
                ->on('roles')
                ->onDelete('cascade');
            $table->primary(['premission_id','role_id']);
        });

        Schema::create('role_user', function (Blueprint $table) {
            $table->integer('user_id')->unsigned();
            $table->integer('role_id')->unsigned();

            $table->foreign('user_id')
                ->references('id')
                ->on('users')
                ->onDelete('cascade');
            $table->foreign('role_id')
                ->references('id')
                ->on('roles')
                ->onDelete('cascade');
            $table->primary(['user_id','role_id']);

        });
    }

☁  laravel-acl  php artisan migrate
Migration table created successfully.


  [Illuminate\Database\QueryException]
  SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constra
  int (SQL: alter table `posts` add constraint posts_user_id_foreign
  foreign key (`user_id`) references `user` (`id`) on delete cascade)



  [PDOException]
  SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constra
  int

可以了,谢谢

怎么 发表一次 出来这么多?