updateExistingPivot won't work - php

Question

I'm trying to update my pivot table approve_document where it has a extra column isApprove using ->withPivot method.
Model:
Document
class Document extends Model
{
public function sentToApprovers()
{
return $this->belongsToMany('App\Models\Approve', 'approve_document')->withPivot('isApprove');
}
}
Approve
class Approve extends Model
{
public function createdpendingDocuments()
{
return $this->belongsToMany('App\Models\Document', 'approve_document')->withPivot('isApprove');
}
}
This is where I get all my records in my approve_document.
Controller:
public function documentsSentForApproval()
{
$pendingDocumentLists = DB::table('approve_document')
->select('documents.title', 'documents.content', 'categories.category_type', 'users.username', 'approve_document.dateReceived', 'documents.id', 'approves.approver_id')
->join('documents', 'documents.id', '=', 'approve_document.document_id')
->join('categories', 'categories.id', '=', 'documents.category_id')
->join('approves', 'approves.id', '=', 'approve_document.approve_id')
->join('users', 'users.id', '=', 'approves.approver_id')
->where('approver_id', '=', Auth::id())
->orWhere('requestedBy', '=', Auth::id())
->get();
return view ('document.pending')
->with('pendingDocumentLists', $pendingDocumentLists);
}
View:
#foreach ($pendingDocumentLists as $list)
<tr class = "info">
<td>{{ $list->title }}</td>
<td>{{ strip_tags(substr($list->content, 0, 50)) }} {{ strlen($list->content) > 50 ? "..." : '' }}</td>
<td>{{ $list->category_type }}</td>
<td>{{ $list->username }}</td>
<td>{{ date('M, j, Y', strtotime($list->dateReceived)) }}</td>
<td>
#if (Auth::id() == $list->approver_id)
<a href = "{{ route ('document.pending', $list->id) }}">
<button type = "submit" class = "btn btn-success glyphicon glyphicon-thumbs-up"> Approve</button>
</a>
#endif
</td>
<td></td>
</tr>
#endforeach
You can see here I have a approve button where I need to set isApprove to true when the button is clicked. You can see that I get the current id of the document when the button was clicked.
This part of the Controller where I'm having a hard time updating my pivot table. It gives me a error MethodNotAllowedHttpException. Any tips or help would greatly appreciated!
public function updateIsApprove($id)
{
$document = new Document();
foreach ($document as $update)
{
$approve = new Approve();
$document->sentToApprovers()->updateExistingPivot([$approve->id => ['isApprove' => '1']],false);
}
return redirect()->route('document.pending');
}
routes:
Route::post('/documents/pending/approve/{id}',
[
'uses' => '\App\Http\Controllers\DocumentController#updateIsApprove',
'as' => 'document.pending',
]);

Answer 1

public function updateExistingPivot($id, array $attributes, $touch = true)
First parametr should be id of related thing.

Answer 2

public function updateIsApprove($documentId, $approveId)
{
$document = Document::find($documentId);
if (!$document) {
// Handle error that document not exists.
}
$approve = $document->sentToApprovers()->find($approveId);
if (!$approve) {
// Handle that approve not exists or is not related with document.
}
$document->sentToApproves()->updateExistingPivot($approve->id, ['isApprove' => 1]);
return redirect()->route('document.pending');
}

Answer 3

MethodNotAllowedHttpException is not for your controller but is for your Route. As you can see, in your Routes file, you have Route for handling POST request, but in your view you are making a GET request by accessing the URL directly.
So, just change the POST route to GET in your Routes file.
Route::get('/documents/pending/approve/{id}',
[
'uses' => '\App\Http\Controllers\DocumentController#updateIsApprove',
'as' => 'document.pending',
]);