Call function from model by passing a variable - laravel

Question

I am approaching Laravel 7, and I am lost in a banality I guess. I create a function in the model that picks up the count of how many posts a category has, then passing the ID parameter.
I call this function in the controller, which then picks up the variable in the views.
It gives me an error:
Object of class Illuminate\Database\Eloquent\Builder could not be
converted to string
How can I solve it?
MODEL
public function scopeCountActivePostCategory($id)
{
$query = DB::table('post')->where([
['status', 1],
['category', $id],
]);
return $query->count();
}
CONTROLLER
// get details category by slug
// preleva dettagli categoria by slug
$detailCat = DB::table('categories')->where('slug', $slug)->first();
// get stories
$post = DB::table('post')
->orderByDesc('id')
->where('category', $detailCat->id)
->where('status', 1)
->paginate($set->app_result_x_page);
return view('category')->with([
'posts' => $posts,
'set' => $set,
'totalActivePost' => Post::CountActivePostCategory($detailCat->id),
'detailCat' => $detailCat
]);

Answer 1

You're missing a get() in your query. The way you have it, you're trying to count query builder (SQL query string) instead of the collection you would get by putting get() on the end of your builder. Change your code to this:
public function scopeCountActivePostCategory($id)
{
$query = DB::table('post')->where([
['status', 1],
['category', $id],
])->get(); //Get here
return $query->count();
}
EDIT
The calling of CountActivePostCategory function might be a problem as well. You are calling static function CountActivePostCategory but you didn't define it as static in your Post model. Change your function to this:
public static function countActivePostCategory($id){
//body
}
And then call it in your controller like this:
'totalActivePost' => Post::countActivePostCategory($detailCat->id)