fix

app/Models/Shop/SaleChannel.php

@@ -13,4 +13,14 @@ class SaleChannel extends Model
     {
         return $this->hasMany(Delivery::class);
     }
+
+    public function price_lists()
+    {
+        return $this->hasMany(PriceList::class);
+    }
+
+    public function tariffs()
+    {
+        return $this->hasManyThrough(Tariff::class, PriceList::class, 'id1', 'tariff_id', 'id2', 'id3')
+    }
 }