feat: Enhance admin permissions and improve product currency handling

backend/product/models.py

@@ -146,14 +146,9 @@ class DollorModel(models.Model):
             price = int(data["lastTradePrice"])
             price_in_usd = price / 10.0
             print('\n\nprice from api \n\n')
-        except:
-            if self.price:
-                print('\n\nprice from last price \n\n')
-                return self.price
+        except Exception as e:
+            return self.defualt_price
 
-            else:
-                print('\n\nprice from defualt price \n\n')
-                return self.defualt_price
         return price_in_usd
 
     class Meta:
@@ -379,7 +374,6 @@ class ProductVariant(models.Model):
     currency_type = (
         ('dollor', 'دلار'),
         ('toman', 'تومان'),
-        ('derham', 'درهم')
     )
     in_pack_items = models.ManyToManyField(
         InPackItems, blank=True, verbose_name='ایتم های داخل پک')
@@ -454,14 +448,11 @@ class ProductVariant(models.Model):
             raise ValidationError(
                 {"dollor_price": "The 'dollor_price' must be provided in the context for dollar pricing."})
 
-        dollar_to_dirham = 0.27
 
         if self.currency == 'toman':
             toman_price = self.input_price
         elif self.currency == 'dollor':
             toman_price = self.input_price * dollor_price
-        elif self.currency == 'derham':
-            toman_price = self.input_price * dollor_price * dollar_to_dirham
         else:
             toman_price = self.input_price