按多个字段对Laravel（4.2）集合进行排序

Question

How can I sort a Laravel Collection by multiple fields?

Imagine I have an "Exams" model, with a relation to "Patients", with date and score fields.

$exams = Exam::all();
$exams->load('Patient');

Now I want to sort this Collection by the patient name and then by the date of the exam.

$exams = $exams->sortBy('patient.name');
$exams = $exams->sortBy('date', 'desc');

This doesn't work, it ignores the first sortBy.

How can I achieve this?

Many thanks! :)

Answer 1

Try this: Hope it helps you.

   $exams = Exam::with(
        ['patient' => function($query) {
            $query->orderBy('name')
            $query->orderBy('date','desc)
          }
        ])
    )->get();

Answer 2

You have to join patients.

Something like:

$exams = Exam::newQuery()
    ->join('patients', 'exams.patient_id', '=', 'patients.id')
    ->orderBy('patients.date', 'DESC')
    ->get()
;