refactor, better class namespace intergration

app/Models/Shop/PriceList.php

@@ -16,31 +16,31 @@ class PriceList extends Model
 
     public function tariff()
     {
-        return $this->belongsTo('App\Models\Shop\Tariff');
+        return $this->belongsTo(Tariff::class);
     }
 
     public function sale_channel()
     {
-        return $this->belongsTo('App\Models\Shop\SaleChannel');
+        return $this->belongsTo(SaleChannel::class);
     }
 
     public function price_list_values()
     {
-        return $this->hasMany('App\Models\Shop\PriceListValue');
+        return $this->hasMany(PriceListValue::class);
     }
 
     public function scopeByTariff($query, $id)
     {
-        return $query->where('tariff_id', $id); 
+        return $query->where($this->table . '.tariff_id', $id); 
     }
 
     public function scopeBySaleChannel($query, $id)
     {
-        return $query->where('sale_channel_id', $id); 
+        return $query->where($this->table . '.sale_channel_id', $id); 
     }
 
     public function scopeByStatus($query, $id)
     {
-        return $query->where('status_id', $id); 
+        return $query->where($this->table . '.status_id', $id); 
     }
 }