Implementing generics.ListCreateAPIView using a serializer on a model with many to many relationship | Django | Page 1

I have models defined as:


class FoodItem(models.Model):
    name = models.CharField(max_length=255)
    price = models.DecimalField(max_digits=8, decimal_places=2)
    def __str__(self) -> str:
        return self.name
    
class Order(models.Model):
    table_number = models.IntegerField()
    customer_name = models.CharField(max_length=255)
    food_items = models.ManyToManyField(FoodItem, through='OrderItem')
   
    total_price = models.DecimalField(max_digits=10, decimal_places=2, default=0)
    timestamp = models.DateTimeField(auto_now_add=True)

    def calculate_total_price(self, food_items):
        # Calculate the total price by summing up subtotals of all order items
        total_price = sum(item.subtotal for item in self.orderitem_set.all())
        self.total_price = total_price
        self.save()
        return total_price

    def get_food_items(self):
        # Return the related food items
        return self.food_items.all()

    def __int__(self):
        return self.table_number

class OrderItem(models.Model):
    order= models.ForeignKey(Order, on_delete=models.CASCADE)
    food_item = models.ForeignKey(FoodItem, on_delete=models.CASCADE)
    quantity = models.IntegerField(default=2)
    subtotal = models.DecimalField(max_digits=8, decimal_places=2, default=0)
    
    def save(self, *args, **kwargs):
        # Calculate subtotal before saving
        self.subtotal = self.quantity * self.price
        super().save(*args, **kwargs)
  
    def __str__(self):
      return f"{self.quantity} x {self.food_item.name} in Order {str(self.order.id)}"

I need help in implementing serializers on a model with many to many field and then writing generics.ListCreateAPIView

#Implementing generics.ListCreateAPIView using a serializer on a model with many to many relationship