Laravel Eloquent关系不起作用

Question

我已经定义了与投资组合的用户关系,但它让我的用户模型为null

class User extends Model implements AuthenticatableContract,
                                    AuthorizableContract,
                                    CanResetPasswordContract
{
    use Authenticatable, Authorizable, CanResetPassword;
    protected $table = 'users';
    protected $fillable = ['name', 'email', 'password'];
    protected $hidden = ['password', 'remember_token'];

    public function portfolio()
    {
        $this->hasMany('App\Portfolio');
    }

}

我的投资组合模型是

class Portfolio extends Model
{

    protected $fillable = ['user_id', 'ptitle', 'pdate','pedate','purl','languages','pdes','attachments'];

    public function user()
    {
        $this->belongsTo('App\User');
    }
    public function attachments()
    {
        $this->hasMany('App\Attachment');
    }
}

我已经在迁移中定义了外键,我的迁移代码是

public function up()
    {
        Schema::create('portfolios', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id')->unsigned();
            $table->string('ptitle');
            $table->timestamps();
            $table->foreign('user_id')
                   ->references('id')
                    ->on('users')
                    ->onDelete('cascade');
        });
    }

我再次运行迁移.当我尝试获取用户投资组合它给我空值我声明这在我的控制器的顶部use App\User; 然后我通过这个命令找到用户 $user=User::find(1),最后我这样做$user->portfolio() 但它给我null我被困在那2至3小时请帮我

Answer 1

你应该返回关系来获取关系数据

public function portfolio()
{
   return $this->hasMany('App\Portfolio');
}