laravel将一行保存到数据库，并获取行和数据透视 - laravel saving a row to database, and get row and pivot back

laravel saving a row to database, and get row and pivot back

我有一个这样设置的模型，

class Project extends Eloquent {
    public function projectmanager(){
        return $this->belongsTo('User', 'project_manager');
    }
}

我对项目数据库中的一行进行编辑，project_manager列返回项目经理用户的ID，我需要该ID的用户详细信息-我保存的数据是这样的，

$project = Project::where('id', '=', $id)->get();  
$project->name = Input::get('name');   
$project->description = Input::get('description');    
$project->total_cost = Input::get('cost');   
$project->start_date = Input::get('start_date');   
$project->finish_date= Input::get('finish_date');   
$project->run_number_days = $this->get_days_between_two_dates(Input::get('start_date'), Input::get('finish_date'));   
$project->num_days_from_year_start = $this->get_days_between_two_dates("2014-01-01", Input::get('start_date'));  
$project->project_manager = Input::get('project_manager');  
    $project->save();  
    return $project

我如何返回行及其所有关系数据，而不是返回我实际保存的内容？

您可以动态加载相关模型

$project->save(); 
$project->load('projectmanager');
return $project;