pre sale system deployment

apps/warehouse/models.py

@@ -113,6 +113,8 @@ class InventoryQuotaSaleTransaction(BaseModel):
     ref_num = models.CharField(max_length=50, null=True)
     terminal = models.CharField(max_length=50, null=True)
     payer_cart = models.CharField(max_length=50, null=True)
+    free_sale_state = models.BooleanField(default=False)
+    pre_sale = models.BooleanField(default=False)
     additional = models.JSONField(default=dict)
 
     @property
@@ -190,3 +192,38 @@ class ExtraSale(BaseModel):
 
     def save(self, *args, **kwargs):
         return super(ExtraSale, self).save(*args, **kwargs)
+
+
+class QuotaPreSaleItem(BaseModel):
+    organization = models.ForeignKey(
+        Organization,
+        on_delete=models.CASCADE,
+        related_name='pre_sales',
+        null=True
+    )
+    distribution = models.ForeignKey(
+        product_models.QuotaDistribution,
+        on_delete=models.CASCADE,
+        related_name='pre_sales',
+        null=True
+    )
+    transaction = models.ForeignKey(
+        InventoryQuotaSaleTransaction,
+        on_delete=models.CASCADE,
+        related_name='pre_sales',
+        null=True
+    )
+    sale_item = models.ForeignKey(
+        InventoryQuotaSaleItem,
+        on_delete=models.CASCADE,
+        related_name='pre_sale',
+        null=True
+    )
+    weight = models.IntegerField(default=0)
+    settlement_state = models.BooleanField(default=False)
+
+    def __str__(self):
+        return f'Distribution {self.distribution.distribution_id} - Transaction {self.transaction.transaction_id}'
+
+    def save(self, *args, **kwargs):
+        return super(QuotaPreSaleItem, self).save(*args, **kwargs)