System.Data.Entity.DynamicProxies

Question

  

我在控制器中尝试了此代码，谁能告诉我解决方案：

public function categories()
  {
    return $this->hasMany(Category::class);
  }

  public function childs() {
    return $this->hasMany(Category::class,'category_id','id') ;
  }

  public function parent()
  {
      return $this->belongsTo(Category::class,'category_id');
  }

  public function isParent()
  {
      return !$this->category_id ? true : false; // if category_id is null => is a Parent Category
  }
public function products(){
     return $this->hasMany(Product::class);
  }


//just added
public function getBreadCrumb(){
        $crumbs = array();

        // handle parent
        if(!empty($this->parent)){
            $crumbs[] = $this->parent->getBreadCrumb();  
        }

        $crumbs[] = '<a href="' . $this->slug . '">' . $this->title . '</a>';
        return implode(">", $crumbs);
    }

javascript函数

public JsonResult GetMembers(Member member)
{
    //var list = repository.GetAll().Select(x => new ViewModel.MemberView
    //{
    //    Memberid = x.id,
    //    Name = x.name,
    //    EmailAddress = x.Email,
    //    Role = x.role.rolename,
    //    ReportingRoleId = Convert.ToInt32(x.reportingroleid)
    //});

    var list = repository.GetAll();
    return Json(list  , JsonRequestBehavior.AllowGet);
}

是错误

  

序列化类型为'System.Data.Entity.DynamicProxies.NewProjects_A3B55EADDAEF6C59245BBD2495E29ECFE10B583596DB24AADF23A4990342D104'的对象时，检测到循环引用。

Answer 1

您应先将数据转换为列表，然后再返回。 EF返回代理用于延迟加载和填充。尝试下面的代码。

var list = repository.GetAll().ToList();

也看看这个。

Why is EF returning a proxy class instead of the actual entity?

Answer 2

我有同样的错误，但这对我有用，这是您要选择的时间

<ul className="nav navbar-nav navbar-right">
        <li className="nav-item dropleft">
            <a className="nav-link" id="walletOptions" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                <img src={require('../img/wallet.svg')} alt="easyfeedbacktoken" height="40px" />
            </a>
            <ul className="dropdown-menu" aria-labelledby="walletOptions">
        <ImportMnemonicModal onUpdateMnemonic = {this.props.onUpdateMnemonic}/>
        <ShowMnemonic mnemonic = {this.props.mnemonic}/>
        <DeleteWallet onUpdateMnemonic = {this.props.onUpdateMnemonic}/>
    </ul>
        </li>
    </ul>