Question

我有一个公司有状态的模型。这意味着有两个表：

事务所
FirmStatus

我在我的项目中定义了这个：

class FirmStatus extends Eloquent {

    protected $table = 'firm_statuses';

    protected $primaryKey = 'firm_status_id';

    protected $fillable = array('firm_status_id', 'name');
}



class Firm extends Eloquent {

    protected $table = 'firms';

    protected $primaryKey = 'firm_id';

    protected $fillable = array('name', 'firm_status_id');

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

    public function firm_status()
    {
        return $this->belongsTo('FirmStatus', 'firm_status_id');
    }
}

但我似乎无法让这个工作，无论我试图访问公司的FirmStatus，它都不起作用？

在我的控制器中，我有这段代码：

        $firm = Firm::find($id);
    $firmClassifications = DB::table('firm_classifications')->orderBy('name', 'asc')->lists('name','firm_classification_id');

    return var_dump($firm);

返回：

object(Firm)[243]
  protected 'table' => string 'firms' (length=5)
  protected 'primaryKey' => string 'firm_id' (length=7)
  protected 'fillable' => 
    array (size=5)
      0 => string 'name' (length=4)
      1 => string 'firm_classification_id' (length=22)
      2 => string 'fca_number' (length=10)
      3 => string 'question_number_passed_on' (length=25)
      4 => string 'firm_status_id' (length=14)
  protected 'connection' => null
  protected 'perPage' => int 15
  public 'incrementing' => boolean true
  public 'timestamps' => boolean true
  protected 'attributes' => 
    array (size=7)
      'firm_id' => int 8
      'name' => string 'siofds4' (length=7)
      'fca_number' => string '' (length=0)
      'firm_classification_id' => int 1
      'created_at' => string '2014-09-08 11:06:17' (length=19)
      'updated_at' => string '2014-09-08 12:24:23' (length=19)
      'firm_status_id' => int 2
  protected 'original' => 
    array (size=7)
      'firm_id' => int 8
      'name' => string 'siofds4' (length=7)
      'fca_number' => string '' (length=0)
      'firm_classification_id' => int 1
      'created_at' => string '2014-09-08 11:06:17' (length=19)
      'updated_at' => string '2014-09-08 12:24:23' (length=19)
      'firm_status_id' => int 2
  protected 'relations' => 
    array (size=0)
      empty
  protected 'hidden' => 
    array (size=0)
      empty
  protected 'visible' => 
    array (size=0)
      empty
  protected 'appends' => 
    array (size=0)
      empty
  protected 'guarded' => 
    array (size=1)
      0 => string '*' (length=1)
  protected 'dates' => 
    array (size=0)
      empty
  protected 'touches' => 
    array (size=0)
      empty
  protected 'observables' => 
    array (size=0)
      empty
  protected 'with' => 
    array (size=0)
      empty
  protected 'morphClass' => null
  public 'exists' => boolean true

我期待$ firm-＆gt; firm_status（方法调用与否，无论哪种方式都有效）将允许我访问指定的公司状态，但$ firm-＆gt; firm_status结果为null。

Answer 1

如果公司可以拥有单一状态，请使用hasOne()代替belongsTo()：

class Firm extends Eloquent {
    public function firm_status()
    {
        return $this->hasOne('FirmStatus', 'firm_status_id', 'firm_status_id');
    }
}

如果您需要查询具有给定状态的所有公司，请将反向关系添加到FirmStatus：

class FirmStatus extends Eloquent {
    public function firm()
    {
        return $this->hasMany('Firm', 'firm_status_id', 'firm_status_id');
    }
}

Answer 2

首先，除非你加载关系，否则你不会在var_dump($firm)结果中看到任何内容。

接下来 - 如果您想使用camelCased（来电dynamic methods），则Eloquent要求您使用$model->relation方法进行关系。

所以你需要：

public function firmStatus()
{
    return $this->belongsTo('FirmStatus', 'firm_status_id');
}

然后你可以访问它：

$firm->firmStatus; // FirmStatus model | null
$firm->firm_status; // this will be translated to firmStatus anyway, but not other way around

并在通话中查看：

$firm = Firm::with('firmStatus')->first();
var_dump($firm);
// but better use toArray(), since it's easier to read
dd($firm->toArray());

Laravel中的一对多

2 个答案: