为什么Laravel关系会阻止对查询构建器方法的调用？

Question

I want to find all patients that belong to a user where id = 1

This works:

$data = Patient::where('user_id', '=', 1)
        ->with('method', 'images')->get()->toJson();

This doesn't work:

$data = User::find(1)->patients->with('method', 'images')->get()->toJson();

It says:

Call to undefined method Illuminate\Database\Eloquent\Collection::with()

Why is it wrong? Could it be corrected?

Answer 1

The reason your code doesn't work is all Eloquent relationship declaration returns different result depending on whether you are trying to access the relationship as property or as method (with () or without () ).

// Return you chainable queries    
$query = User::find(1)->patients()->... 
// Return you collection of patients
$patientsCollection = User::find(1)->patients;

Answer 2

尝试

User::find(1)->patients()->with('method', 'images')->get()->toJson();

Answer 3

Try this

$patient = New Patient;
$data = $patient->where('user_id','=',1)->with('method','images')->get()->toJson();