problem in one to many relationship in laravel

Question

Task.php

public function projects()
    {
        return $this->hasMany(Project::class);
    }

Project.php

 public function tasks()
    {
        return $this->belongsTo(Task::class);
    }

My Controller

public function store(Request $request,$id)
{
    $request->validate([
        'member_name' => 'required',
        'module' => 'required_without:file',
        'file' => 'required_without:module'
    ]);
    $project=Project::find($id);
    $task = new Task();
    if ($request->hasfile('file'))
    {
            $ext = $request->file->getClientOriginalName();
            $filename=$request->module.".".$ext;
            $request->file->move(public_path() . '/members/', $filename);
            $task->file = $filename;
    }
    if($request->module)
    {
        $task->module=$request->module;
    }
    $task->member_name=$request->member_name;
    $project->tasks()->save($task);
    return redirect('tasks');
}

Now when i call save method it gives me the following error Call to undefined method Illuminate\Database\Eloquent\Relations\BelongsTo::save() I cant understand why this is happen. Please help me to solve this. I will be greatefull to you

Answer 1

Change this

 $project->tasks()->save($task);

to this

$task->save();

Additionally project has many-to-one relation with tasks so the function name should be singular as many projects could be belong to only one task

public function task()
{
    return $this->belongsTo(Task::class);
}