Property [articles] does not exist on this collection instance

I have this code in my model called Tag:

<?php

namespace App;

use IlluminateDatabaseEloquentModel;

class Tag extends Model
{
    protected $fillable = [
        'tag'
    ];

    public function articles(){
        return $this->belongsToMany(Article::class);
    }
}

and I use this code in my controller

 public function fillter($target){
        $tags = tag::where('id', 3)->count();
        $article = $tags->articles;

        foreach ($article as $article){
            return $article->title;
        }

    }

when I run the code, I get an exception: Property [articles] does not exist on this collection instance.

but if I am able to run the following code:

$tags = tag::where('id', 3)->first();

Answer

You are practically trying to get articles from integer value, since that is what count() function returns. This line of code returns an integer:

$tags = tag::where('id', 3)->count(); // For ex: 3

And you are trying to do this in the next line of code:

$article = 3->articles; //Which doesn't exist

By using this line of code here:

$tags = tag::where('id', 3)->first();

You are returning a Tag instance, which in fact has the articles property.

Also, your foreach code won’t work because of two reasons:

First: You can’t use same variable in your foreach loop, it should be like this:

foreach($articles as $article)

Second: It will stop executing after the first loop, since you have a return statement:

foreach ($articles as $article){
     return $article->title;
}

It would be better to pass the $articles variable to your view, and do a foreach loop there.