Laravel Form with multiple select - php

Question

I have the following controller, which sends data to a Laravel Blade view:
Controller:
public function create()
{
$schools = School::all()->sortBy('school_type');
return view('invoices.create')->with([
'schools' => $schools,
'dayTypes' => $dayTypes,
]);
}
In that Laravel blade view there is a form:
<form method="GET" action="{{ route('invoices.choose-periods') }}">
<div class="form-group {{ $errors->has('school') ? 'has-error' : '' }}">
<label>School</label>
<select id="school" class="form-control" name="school[]" multiple size="{{ $schools->count() }}" required>
#foreach ($schools as $school)
<option value="{{ $school->id }}">{{ $school->name }}</option>
#endforeach
</select>
#if ($errors->has('school'))
<span class="help-block">
<strong>{{ $errors->first('school') }}</strong>
</span>
#endif
</div>
<button type="submit" class="btn btn-success btn-sm pull-right">Submit</button>
</form>
As you can see from the HTML, the form is a multi-select form, with the resulting data stored in a school[] array.
On submission of the form, I do a test die and dump on request('school') and see that for every option I have selected, the value seems to have been logged twice. For example, choosing only one option gives me:
array:2 [▼
0 => "15"
1 => "15"
]
Any ideas? Thanks!

Answer 1

I have only worked on laravel 5.7. Try this It is working for me.
Since you are passing 2 objects
return view('invoices.create')->with([
'schools' => $schools,
'dayTypes' => $dayTypes,
]);
It is obvious you will get 2 errors.
In your controller change this
public function create()
{
$schools = School::all()->sortBy('school_type');
return view('invoices.create')->with([
'schools' => $schools,
'dayTypes' => $dayTypes,
]);
}
to this
public function create(){
$schools = School::all()->sortBy('school_type');
return view('invoices.create', ['schools' => $schools]),
]);
}