php - 如何访问与另一表相关的一列 Laravel 5.1

Question

我有 3 个模型，Trials 有一个样本，track 有一个试验，我需要访问样本名称，我尝试这样做，但收到此错误:

BadMethodCallException in Builder.php line 2024: Call to undefined method Illuminate\Database\Query\Builder::samples()

Controller :

public function track($id){
        $tracks = track::with('trials')->with('samples')->where('trials_id',$id)->get();

        return view('Tracks.index',compact('tracks'));
    }

示例:

class samples extends Model
{
    protected $fillable = ['variety'];

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

试用:

class trial extends Model
{
    protected $fillable = ['amount','date','comments','code'];

    public function Samples()
    {
        return $this->hasOne('App\samples', 'id', 'samples_id');
    }

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

轨道:

class track extends Model
{
    public function Trials()
    {
        return $this->hasOne('App\trial', 'id', 'trials_id');
    }
}

Answer 1

尝试一下

$tracks = track::with('trials.samples')->where('trials_id',$id)->get();

引用:- Nested Eager Loading