dynamic pricing

backend/product/models.py

@@ -2,6 +2,8 @@ from django.db import models
 from django.utils.text import slugify
 from account.models import User
 from django.urls import reverse
+import requests
+
 
 class CategoryModel(models.Model):
     name = models.CharField(max_length=50, verbose_name='نام دسته‌بندی')
@@ -53,10 +55,52 @@ class CategoryModel(models.Model):
             category = category.parent
         return breadcrumb[::-1]
       
+class DollorModel(models.Model):
+    price = models.FloatField(null=True, blank=True)
+    defualt_price = models.FloatField(null=True, blank=True, default=80000.0)
+    # these fields will avoid dublicate of this model
+    unique = (('unique', 'unique'),)
+    unique_filed = models.CharField(max_length=20, choices=unique, unique=True, default='unique')
+    def __str__(self):
+        return str(self.price)
+    def save(self, *args, **kwargs):
+        if not self.price:
+            self.update_price()
+        super().save(*args, **kwargs)
+
+    def update_price(self):
+        self.price = self.get_usd_price()
+
+    def get_usd_price(self):
+        try:
+            api_usd = "https://api.nobitex.ir/v2/orderbook/USDTIRT"
+            response = requests.get(api_usd)
+            data = response.json()
+            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
+                
+            else:
+                print('\n\nprice from defualt price \n\n')
+                return self.defualt_price
+        return price_in_usd
+    
+
+
 class ProductModel(models.Model):
     name = models.CharField(max_length=255)
     description = models.TextField()
-    price = models.PositiveIntegerField(default=0)
+    price = models.PositiveIntegerField(default=0, help_text='قیمت')
+    currency_type = (
+        ('dollor', 'دلار'),
+        ('toman', 'تومان'),
+        ('derham', 'درهم')
+    )
+    currency = models.CharField(verbose_name='نوع ارز', max_length=20, choices=currency_type)
     image = models.ImageField(upload_to='product_images/')
     rating = models.PositiveIntegerField(default=0)
     view = models.IntegerField(default=0, verbose_name='بازدید')
@@ -75,14 +119,6 @@ class ProductModel(models.Model):
         formatted_num = "{:,.0f}".format(discount_price)
         return formatted_num
 
-    def discount_price(self):
-        discount_price = int(self.price * (100 - self.discount) / 100)
-        return discount_price
-
-    def format_price(self):
-        price = self.price
-        formatted_num = "{:,.0f}".format(price)
-        return formatted_num
 
     def __str__(self):
         return self.name