Laravel - Looping through a nested collection

Question

Function to get all the required data:

$auditResults = Audit::where('audit_id', $id)
    ->with('questionDetail')
    ->with('questionDetail.auditQuestion')
    ->get();

Which returns (streamlined):

Audit {#427 ▼
  #relations: array:1 [▼
    "questionDetail" => AuditQuestionDetail {#449 ▼
      #relations: array:1 [▼
        "auditQuestion" => AuditQuestion {#471 ▼
          #original: array:5 [▶]
        }
      ]
    }
  ]
}

How can I loop within the view, to reach the auditQuestion relationship, for each Audit?

I have tried:

@foreach($auditResults->questionDetail->auditQuestion as $answer)

But I get:

Undefined property: Illuminate\Database\Eloquent\Collection::$questionDetail

Many thanks.

** Issue with first relationship: **

   Collection {#470 ▼
  #items: array:18 [▼
    0 => Audit {#427 ▼
      #fillable: array:4 [▶]
      #attributes: array:7 [▶]
      #original: array:7 [▶]
      #relations: array:1 [▼
        "questionDetail" => AuditQuestionDetail {#449 ▼
          #table: "audit_questions_details"
          #fillable: array:3 [▶]
          #attributes: array:7 [▶]
          #original: array:7 [▼
            "id" => 2
            "audit_question_id" => 2
            "question_number" => 1
            "comment" => 1
            "header" => 0
            "created_at" => "2017-03-26 13:40:18"
            "updated_at" => "2017-03-26 13:40:18"
          ]

Answer 1

In Laravel 5.4, you can use higher order messages to do this cleanly:

@foreach($auditResults->map->questionDetail->map->auditQuestion as $answer)

Answer 2

Use nested loops:

@foreach ($auditResults as $result)
    @foreach ($result->questionDetail as $detail)
        @foreach ($detail->auditQuestion as $question)
            {{ $question->id }}
        @endforeach
    @endforeach
@endforeach