//病人模型
class Patient extends Model
{
  /**
   * 病人附表
   * @return \Illuminate\Database\Eloquent\Relations\HasOne
   */
  public function patientdata ()
  {
    return $this->hasOne(PatientData::class);
  }
  
 //病人附表模型
class PatientData extends Model
{
  public function patient()
  {
    return $this->belongsTo(Patient::class);
  } 
  

/**
 * 新增病人信息
 * @param array $data
 *
 * @return bool
 */
public function savePatient($data=[])
{
  DB::beginTransaction();
  if($patient = $this->create($data)){
    if ($res = $patient->patientdata()->create(["数据"])){
      DB::commit();
    } else{
      DB::rollBack();
    }
    return true;
  }
  return false;
}

public function updatePatient($data=[])
{
  DB::beginTransaction();
  //先通过主键获得病人模型的实例
  $patient = $this->find($data['id']);
  if($patient->update($data)){
    if ($res = $patient->patientdata()->where('patient_id',$data['id'])->update(["数据"])){
      DB::commit();
    } else{
      DB::rollBack();
    }
    return true;
  }
  return false;
}