Add deep relations

app/Models/Shop/Tariff.php

@@ -15,6 +15,11 @@ class Tariff extends Model
 
     protected $guarded = ['id'];
     protected $table = 'shop_tariffs';
+
+    public function offers()
+    {
+        return $this->hasMany(Offer::class);
+    }
     
     public function sale_channel()
     {
@@ -37,6 +42,11 @@ class Tariff extends Model
         return $this->hasMany(PriceList::class);
     }
 
+    public function price_list_values()
+    {
+        return $this->hasManyThrough(PriceListValue::class, PriceList::class);
+    }
+
     public function scopeByAutocomplete($query, $str)
     {
         return $query->where($this->table . '.name', 'LIKE', "%${str}%")
@@ -53,4 +63,11 @@ class Tariff extends Model
     {
         return $query->where($this->table . '.status_id', $id);
     }
+
+    public function scopeByOffer($query, $id)
+    {
+        return $query->whereHas('offers', function ($query) use ($id) {
+            $query->where('id', $id);
+        });
+    }
 }