Laravel模型-抓取对象的ID

Question

I know that one can create an object from a model that represents a particular entry in the DB by using ModelName::find($model_id) . What I'm curious about is how one goes about grabbing the current ID within the model on a function - so say that I wanted to expand the User model so that it will return all of the songs uploaded by said user.

I want to just be able to call $user = User::find($user_id) to grab the relevant user, and then call the function from within the model like so: $user->list_songs() ;. How do I, within this function in the model (public function list_songs()), check to see what the current id is? I'm currently passing it as a variable, and this seems counter-intuitive to the idea of a model.

Answer 1

在模型内，只要将模型保存到数据库中，就可以简单地使用$this->id 。