Laravel 4 模型关系通过另一个模型

Question

我正在尝试将多个模型绑定到一个表单。目前，我有 4 个模型：

<?php

class DemDataSet extends Eloquent {

    public $timestamps = false;
    protected $connection = 'epcr_dem_data';
    protected $table = 'DEMDataSet';
    protected $primaryKey = 'pk_DEMDataSet';

    public function DemographicReport(){
        return $this->hasOne('DemographicReport','fk_DemDataSet','pk_DemDataSet');
    }

}

class DemographicReport extends Eloquent {

    public $timestamps = false;
    protected $connection = 'epcr_dem_data';
    protected $table = 'DemographicReport';
    protected $primaryKey = 'pk_DemographicReport';

    public function DemDataSet(){
        return $this->belongsTo('DemDataSet','fk_DemDataSet','pk_DemDataSet');
    }

    public function dAgency(){
        return $this->hasOne('dAgency','fk_DemographicReport','pk_DemographicReport');
    }

}

class dAgency extends Eloquent {

    public $timestamps = false;
    protected $connection = 'epcr_dem_data';
    protected $table = 'dAgency';
    protected $primaryKey = 'pk_dAgency';

    public function DemographicReport(){
        return $this->belongsTo('DemographicReport','fk_DemographicReport','pk_DemographicReport');
    }

    public function dAgency_10(){
        return $this->hasMany('dAgency_10','fk_dAgency','pk_dAgency');
    }

}

class dAgency_10 extends Eloquent {

    public $timestamps = false;
    protected $connection = 'epcr_dem_data';
    protected $table = 'dAgency_10';
    protected $primaryKey = 'pk_dAgency_10';

    public function dAgency(){
        return $this->belongsTo('dAgency','fk_dAgency','pk_dAgency');
    }

}

?>

我通过我的控制器将它传递给我的视图，如下所示：

public function index()
{
    //THIS is the line I need help with (I think):
    $agency = dAgency::with('dAgency_10','DemographicReport')->find(1);

    //for troubleshooting:
    echo "<pre>",print_r(dAgency::with('dAgency_10','DemographicReport')->find(1)->toArray()),"</pre>";

    return View::make('test')
        ->with('agency', $agency);
}

我能够绑定除来自 DemDataSet 模型的数据之外的所有内容，我什至不知道如何在它和我的 dAgency 模型之间建立关系。所以基本上，我只希望 DemDataSet 模型中的字段可用于我的视图，那么显然我希望最终能够执行所有 CRUD 操作。

Answer 1

查看您的模型，您应该可以通过DemographicReport 访问它。

即，

$dataset = $agency->DemographicReport->DemDataSet;