Laravel 5 check if pivot data is already in database - php

Question

Got a ManyOnMany system (3 tables, projects, users, project_user)
Many users can work on a project, and a user can have many projects.
When checkbox = checked it sends the database to the pivot table.
Now I'm facing the problem that everytime I click the project/user id will get send to the project_user table.
And I need to have the checkbox already checked when the user is actually added to the project.
So how I see it: the form::checkbox has a third function checked or not checked, and with an if/else statement in my controller.edit I will have a validation somehow. Please help me!
Blade:
#foreach($users as $user)
<tr>
<td>
{{$user->firstname}} {{$user->middlename}} {{$user->lastname}}
</td>
<td>
{!! Form::checkbox('contribute['.$user->id.']', '1', $checkifinproject) !!}
</td>
</tr>
#endforeach
Controller:
public function edit($id, Project $project)
{
$users = User::all();
$project = $this->project->find($id);
if ($users == $project)
{
$checkifinproject = 'checked';
}
else {
}
return view('project.edit', ['project' => $project, 'id' => 'edit', 'project_id' => $id], compact('users'));
}
public function update(CreateProjectRequest $request)
{
if($request->get('contribute'))
{
foreach($request->get('contribute') as $k => $contribute)
{
if($contribute == 1)
{
$project = $this->project->find($request->project_id);
$project->users()->attach($k);
}
}
}
$project = $this->project->find($request->project_id);
$project->fill($request->input())->save();
return redirect('project');
}
Model:
User
public function projects()
{
return $this->belongsToMany('App\Project', 'project_user', 'user_id', 'project_id');
}
Project
public function users()
{
return $this->belongsToMany('App\User', 'project_user', 'project_id', 'user_id');
}

Answer 1

I think the issue is you are comparing two things that will never be the same and trying to determine if that user belongs to the project. A better thing to do would be to query all the users with their projects and as you loop through the users, check to see that the project you are modifying is one of the projects the user belongs to.
That can be done like this...
Controller
public function edit($id, Project $project)
{
$users = User::with('projects')->get();
$project = $this->project->find($id);
return view('projects.edit', ['users' => $users, 'project' => $project]);
}
View
#foreach($users as $user)
<tr>
<td>
{{$user->firstname}} {{$user->middlename}} {{$user->lastname}}
</td>
<td>
{!! Form::checkbox('contribute['.$user->id.']', '1', $user->projects->contains('id', $project->id)) !!}
</td>
</tr>
#endforeach