为什么 BelongsTo() 在 Laravel 6 中不起作用?

Why BelongsTo() isn't working in Laravel 6?

我有两个模型 UserAccountType

class User extends Authenticatable
{
    (...)

    public function accountType()
    {
        return $this->belongsTo('App\AccountType', 'account_type_id', 'id');
    }
}
class AccountType extends Model
{
  protected $table = 'account_types';
  // protected $primaryKey = 'id';

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

我的数据库:

        Schema::create('users', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->bigInteger('account_type_id')->unsigned();
            $table->foreign('account_type_id')->references('id')->on('account_types');
            $table->string('full_name');
            $table->string('email')->unique();
            $table->timestamp('email_verified_at')->nullable();
            $table->string('password');
            $table->rememberToken();
            $table->timestamps();
        });
        Schema::create('account_types', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('account_type_name');
        });

当我使用 hasMany 时 - 一切都很顺利,但是当我尝试使用 $user->accountType->account_type_name 时它不起作用。我用来打印用户的循环:

                @foreach ($users as $user)
                  <tr>
                    <td>{{ $user->full_name }}</td>
                    <td>
                      <a href="#" class="badge badge-pill badge-warning">No team</a>
                    </td>
                    <td>
                      xyz
                    </td>
                    <td> {{ $user->accountType->account_type_name }} </td>
                    <td><a href="mailto:{{ $user->email }}">{{ $user->email }}</a></td>
                    <td>{{ $user->created_at }}</td>
                  </tr>
                @endforeach

和错误。当我注释掉 $user->accountType->account_type_name 时它工作正常。

ErrorException
Undefined offset: 1

详情在这里 - https://flareapp.io/share/jKPgOZPa

提前致谢!

您需要使用蛇形大小写而不是驼色大小写:

<td> {{ $user->account_type->account_type_name }} </td>

您似乎定义了错误的关系。您的用户模型应该是这样的:

class User extends Authenticatable
{
    (...)

    public function accountType()
    {
        return $this->hasOne('App\AccountType', 'account_type_id', 'id');
    }
}

帐户类型模型应该是这样的:

class AccountType extends Model
{
     protected $table = 'account_types';
    // protected $primaryKey = 'id';

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

我已经用 <td> {{ App\User::find($user->id)->accountType->account_type_name }} </td> 替换了 <td> {{ $user->accountType->account_type_name }} </td>,现在似乎一切正常。

你可以试试这个....我的工作完美..

$user->accountType->first() ->account_type_name