blade file : $meeting is undefined - php

Question

Whenever I visit the add-meeting URL, I receive an error message stating that $meeting is undefined. However, when I attempt to edit a meeting, everything works as expected. I am using the same blade file for both creating and updating meetings. Can you explain why this error is occurring?
Here is MeetingController:
public function add_meeting()
{
$customers = Customer::all();
$projects = Project::all();
return view('admin.meeting.add-meeting', get_defined_vars());
}
public function store(Request $request)
{
$this->validate($request, [
'meeting_scedule' => 'required',
'meeting_user_id' => 'required',
'project_id' => 'required',
'agenda' => 'required',
]);
if ($request->id) {
$input['meeting_scedule'] = $request->meeting_scedule;
$input['meeting_user_id'] = $request->meeting_user_id;
$input['project_id'] = $request->project_id;
$input['agenda'] = $request->agenda;
$meeting = Meeting::where('id', $request->id)->update($input);
return back()->with('success', 'Updated Successfully!');
} else {
$new['meeting_scedule'] = $request->meeting_scedule;
$new['meeting_user_id'] = $request->meeting_user_id;
$new['project_id'] = $request->project_id;
$new['agenda'] = $request->agenda;
$meeting = new Meeting();
$meeting->persist($new);
return back()->with('success', 'Meeting Created Successfully!');
}
}
public function edit_meeting($id)
{
$customers = Customer::all();
$projects = Project::all();
$meeting = Meeting::find($id);
return view('admin.meeting.add-meeting', get_defined_vars());
}
Here is add-meeting.blade.php file:
<form action="{{url('admin/update-meeting')}}" method="POST" id="add-rel-form"
enctype="multipart/form-data">
#csrf
#if(isset($meeting))
<input class="hidden" type="hidden" name="id" value="{{$meeting->id ?? ''}}">
#endif
<div class="form-row">
<div class="form-group col-md-6 mb-0">
<label> Meeting Schedule</label>
<div class="form-group">
<input type="datetime-local" value="{{$meeting->meeting_scedule ?? ''}}" required
class="form-control" name="meeting_scedule" id="meeting_scedule">
</div>
</div>
<div class="form-group col-md-6 mb-0">
<label> User</label>
<select id="customer-select" class='form-control' required name="meeting_user_id">
<option value="" id="">--Select User--</option>
#foreach($customers as $customer)
<option value="{{$customer->id}}"{{ $customer->id == $meeting->meeting_user_id ? 'selected' : '' }}>{{$customer->first_name." ".$customer->last_name}}</option>
#endforeach
</select>
</div>
</div>
<div class="form-row">
<div class="form-group col-md-6 mb-0">
<label> Project</label>
<select id="project-select" class='form-control' required name="project_id" disabled>
<option value="" id="">--Select Project--</option>
#foreach($projects as $project)
<option value="{{$project->id}}"{{$project->id == $meeting->project_id ? 'selected' : ''}}>{{$project->project_type}}</option>
#endforeach
</select>
</div>
<div class="form-group col-md-6 mb-0">
<label> Agenda</label>
<div class="form-group">
<textarea type="text" value="" required
class="form-control" name="agenda" id="agenda">{{$meeting->agenda ?? ''}}</textarea>
</div>
</div>
</div>

Answer 1

Since there is no $meeting variable when creating a new meeting, the error occurs.
You can use null coalescing operator (??) or ternary operator (?:) to check if $meeting is defined before attempting to access its properties :
#if(isset($meeting))
<input class="hidden" type="hidden" name="id" value="{{$meeting->id}}">
#endif
...
<select id="customer-select" class='form-control' required name="meeting_user_id">
<option value="" id="">--Select User--</option>
#foreach($customers as $customer)
<option value="{{$customer->id}}" {{ isset($meeting) && $customer->id == $meeting->meeting_user_id ? 'selected' : '' }}>{{$customer->first_name." ".$customer->last_name}}</option>
#endforeach
</select>
...
<select id="project-select" class='form-control' required name="project_id" disabled>
<option value="" id="">--Select Project--</option>
#foreach($projects as $project)
<option value="{{$project->id}}"{{ isset($meeting) && $project->id == $meeting->project_id ? 'selected' : ''}}>{{$project->project_type}}</option>
#endforeach
</select>
...
<textarea type="text" value="" required class="form-control" name="agenda" id="agenda">{{ isset($meeting) ? $meeting->agenda : '' }}</textarea>