add new api

core/apps/orders/models/__init__.py

@@ -1 +1,2 @@
-from .order import *
+from .order import *
+from .order_offer import *

core/apps/orders/models/order_offer.py

@@ -0,0 +1,37 @@
+from django.db import models
+
+from core.apps.shared.models import BaseModel
+from core.apps.orders.models import Order
+
+
+class Offer(BaseModel):
+    PRICE_TYPE = (
+        ('UZS', 'uzs'),
+        ('USD', 'usd')
+    )
+    
+    order = models.ForeignKey(Order, on_delete=models.CASCADE, related_name='offers')
+    name = models.CharField(max_length=200)
+    price = models.PositiveBigIntegerField()
+    price_type = models.CharField(choices=PRICE_TYPE, default='uzs')
+    phone = models.CharField(max_length=15, null=True, blank=True)
+    comment = models.TextField(null=True, blank=True)
+    qqs = models.BooleanField(default=False, null=True, blank=True)
+    number = models.PositiveIntegerField(default=1)
+
+    def __str__(self):
+        return self.name
+    
+    def save(self, *args, **kwargs):
+        if not self.pk:
+            last_offer = Offer.objects.filter(order=self.order).order_by('-number').first()
+            if last_offer:
+                self.number = last_offer.number + 1
+            else:
+                self.number = 1
+        return super().save(*args, **kwargs)
+
+    class Meta:
+        verbose_name = 'Taklif'
+        verbose_name_plural = 'Takliflar'
+