Question

关于LaraCSV，我的收藏/模型关系遇到了一些问题。这是其文档：https://github.com/usmanhalalit/laracsv#full-documentation。我现在有3个可以互动的模型：医生，患者，脚本

Doctor belongsToMany Patient
Patient belongsToMany Doctor

Patient hasMany Script
Script belongsTo Patient

我还在Doctor模型中创建了一个关系链接，该链接可用于将Doctor与脚本相关联，但在这种情况下似乎不起作用：

public function scripts() {
    $this->load(['patients.scripts' => function($query) use (&$relation) {
        $relation = $query;
    }]);

    return $relation;
}

我正在尝试做的是允许管理员和我们的用户下载包含所有脚本的CSV文件。虽然这对于管理员人员来说很好用，因为我可以直接引用模型，但由于它们与医生联系在一起，因此我无法使其对用户有用，而且我似乎无法像平常一样将其与脚本联系起来。这是适合管理员的完美工作版本：

$doctors = Doctor::orderBy('last_name', 'asc')->get();
$patients = Patient::orderBy('last_name', 'asc')->get();
$scripts = Script::orderBy('prescribe_date', 'desc')->get();

$csvExporter->beforeEach(function ($script) use ($doctors, $patients) {
    $patient = $patients->where('id', $script->patient_id)->first();
    $doctor = $patient->doctors->first();
    $script->patient = $patient->full_name;
    $script->doctor = $doctor->full_name;
});

以下是用户特定版本的显示方式：

$doctors = User::
    find(Auth::user()->id)
    ->doctors()
    ->orderBy('last_name', 'asc')
    ->get();
$patients = Patient::orderBy('last_name', 'asc')->get();
$scripts = $doctors->scripts()->get();

尝试链接我的Doctor模型scripts()函数会导致错误：Method Illuminate\Database\Eloquent\Collection::scripts does not exist.

$doctors = User::
    find(Auth::user()->id)
    ->doctors()
    ->orderBy('last_name', 'asc')
    ->get();
$patients = array();
$scripts = array();
foreach ($doctors as $doctor_fe) {

    foreach ($doctor_fe->patients as $patient_fe) {
        $patients[] = $patient_fe;

        foreach ($patient_fe->scripts as $script_fe) {
            $scripts[] = $script_fe;
        }
    }
}

我也尝试使用数组提取信息，但不幸的是，它必须是通过以下错误传递的集合：Argument 1 passed to Laracsv\Export::addCsvRows() must be an instance of Illuminate\Database\Eloquent\Collection, array given

Answer 1

我通过将所有属于用户医生的患者放置在一个foreach循环中来解决，然后使用另一个患者来获取患者的ID。然后，我获取患者的id数组，并使用whereIn函数比较脚本的Patient_id字段以获取正确的条带。

$doctors = User::
    find(Auth::user()->id)
    ->doctors()
    ->orderBy('last_name', 'asc')
    ->get();

$patients_array = array();

foreach ($doctors as $doctor_fe) {
    $patients_fe = $doctor_fe->patients;
        foreach ($patients_fe as $patient_fe) {
            $patients_array[] = $patient_fe->id;
         }
     }

$patients = Patient::orderBy('last_name', 'asc')->get();
$scripts = Script::whereIn('patient_id', $patients_array)->get();

$csvExporter->beforeEach(function ($script) use ($doctors, $patients) {
    $patient = $patients->where('id', $script->patient_id)->first();
    $patient_initials = substr($patient->first_name, 0, 1) . substr($patient->last_name, 0, 1);
    $doctor = $patient->doctors->first();
    $script->patient = $patient_initials;
    $script->doctor = $doctor->full_name;
});

Answer 2

如果我正确地解释了您的问题，则您希望获取医生所有患者的所有脚本。 Laravel为此提供了hasManyThrough()方法：

class Doctor extends Model
{
    /**
     * Get all of the scripts for the patient.
     */
    public function scripts()
    {
        return $this->hasManyThrough(App\Script::class, App\Patient::class);
    }
}

第一个参数是您要获取的模型（脚本）；第二个参数是中间模型（患者）。

要使用它：

$doctor = Doctor::first();
$scripts = $doctor->scripts;

Laravel / LaraCSV管理复杂的关系

2 个答案: