Eager loading with route model binding

We can eager load the needed relations by customizing the resolution logic (for route model binding) by defining a resolveRouteBinding method on the model.

// In the Novel model
public function resolveRouteBinding($value)
{
    return $this->with(['chapters', 'bookmarks'])->where($this->getRouteKeyName(), $value)->firstOrFail();
}

https://laravel.com/docs/6.x/routing#explicit-binding

There is “Lazy Eager Loading“. The syntax is $novel->load('chapters', 'bookmarks');