belongsTo(Article::class); } public function article_family() { return $this->belongsTo(ArticleNature::class); } public function scopeByArticle($query, $id) { return $query->where($this->table . '.article_id', $id); } public function scopeByArticleNature($query, $id) { return $query->where($this->table . '.article_family_id', $id); } }