Add deep relations

app/Models/Shop/Offer.php

@@ -18,16 +18,6 @@ class Offer extends Model
         return $this->belongsTo(Article::class);
     }
 
-    public function categories()
-    {
-        return $this->article->categories();
-    }
-
-    public function tags()
-    {
-        return $this->article->tags();
-    }
-
     public function tariff()
     {
         return $this->belongsTo(Tariff::class);
@@ -38,14 +28,54 @@ class Offer extends Model
         return $this->belongsTo(Variation::class);
     }
 
+    public function price_lists()
+    {
+        return $this->hasManyThrough(PriceList::class, Tariff::class, 'id', 'tariff_id', 'id', 'id');
+    }
+
+    public function categories()
+    {
+        return $this->article->categories();
+    }
+
+    public function tags()
+    {
+        return $this->article->tags();
+    }
+
+    public function get_price_lists()
+    {
+        return $this->tariff->price_lists();
+    }
+
+    public function get_price_list_values()
+    {
+        return $this->tariff->price_lists->price_list_values();
+    }
+
     public function scopeActive($query)
     {
-        return $query->where('status_id', 1);
+        return $query->where($this->table . '.status_id', 1);
     }
 
     public function scopeByArticle($query, $id)
     {
-        return $query->where('article_id', $id);
+        return $query->where($this->table . '.article_id', $id);
+    }
+
+    public function scopeByOffer($query, $id)
+    {
+        return $query->where($this->table . '.id', $id);
+    }
+
+    public function scopeByStatus($query, $id)
+    {
+        return $query->where($this->table . '.status_id', $id);
+    }
+
+    public function scopeByVariation($query, $id)
+    {
+        return $query->where($this->table . '.variation_id', $id);
     }
 
     public function scopeByArticleNature($query, $article_nature_id)
@@ -69,11 +99,6 @@ class Offer extends Model
         });
     }
 
-    public function scopeByStatus($query, $id)
-    {
-        return $query->where('status_id', $id);
-    }
-
     public function scopeByTag($query, $tag_id)
     {
         return $query->whereHas('article.tags', function ($query) use ($tag_id) {
@@ -88,8 +113,4 @@ class Offer extends Model
         });
     }
 
-    public function scopeByVariation($query, $id)
-    {
-        return $query->where('variation_id', $id);
-    }
 }