feat: auto complete stock change

stock/models.py

@@ -8,6 +8,13 @@ import decimal
 
 # ==================== 枚举类定义 ====================
 
+class StockFreezeStatusEnum(models.IntegerChoices):
+    """库存冻结状态类型"""
+
+    FROZEN = 1, '冻结中'
+    CANCELLED = 2, '已取消'
+    COMPLETED = 3, '已成单'
+
 class StockChangeSourceEnum(models.IntegerChoices):
     """库存变动来源类型"""
 
@@ -35,6 +42,12 @@ class PurchaseOrder(ModelBase):
     """采购单模型"""
 
     id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey(
+        basic_info_models.Merchant, 
+        on_delete=models.PROTECT, 
+        related_name='purchase_orders', 
+        verbose_name='所属商户'
+    )
     supplier = models.ForeignKey(basic_info_models.Supplier, on_delete=models.PROTECT, related_name='purchase_orders', verbose_name='供应商')
     order_date = models.DateField(verbose_name='订单日期')
     total_amount = models.DecimalField(max_digits=15, decimal_places=2, verbose_name='总金额')
@@ -52,6 +65,12 @@ class StockChangeRecord(ModelBase):
     """库存变动记录模型"""
 
     id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey(
+        basic_info_models.Merchant, 
+        on_delete=models.PROTECT, 
+        related_name='stock_change_records', 
+        verbose_name='所属商户'
+    )
     type = models.IntegerField(choices=StockChangeTypeEnum.choices, verbose_name='变动类型')
     warehouse = models.ForeignKey(
         basic_info_models.WareHouse,
@@ -127,6 +146,12 @@ class StockChangeDetail(ModelBase):
     """库存变动明细模型"""
 
     id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey(
+        basic_info_models.Merchant, 
+        on_delete=models.PROTECT, 
+        related_name='stock_change_details', 
+        verbose_name='所属商户'
+    )
     product = models.ForeignKey(
         basic_info_models.Product,
         on_delete=models.PROTECT,
@@ -161,6 +186,12 @@ class Inventory(ModelBase):
     """库存模型"""
 
     id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey(
+        basic_info_models.Merchant, 
+        on_delete=models.PROTECT, 
+        related_name='inventories', 
+        verbose_name='所属商户'
+    )
     product = models.ForeignKey(
         basic_info_models.Product,
         on_delete=models.PROTECT,
@@ -192,6 +223,12 @@ class StockSnapshot(ModelBase):
     """库存变动快照模型"""
 
     id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey(
+        basic_info_models.Merchant, 
+        on_delete=models.PROTECT, 
+        related_name='stock_snapshots', 
+        verbose_name='所属商户'
+    )
     product = models.ForeignKey(
         basic_info_models.Product,
         on_delete=models.PROTECT,
@@ -252,3 +289,76 @@ class StockSnapshot(ModelBase):
     class Meta:
         verbose_name = '库存快照'
         verbose_name_plural = '库存快照'
+
+
+class StockFreeze(ModelBase):
+    """库存冻结模型"""
+
+    id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey(
+        basic_info_models.Merchant, 
+        on_delete=models.PROTECT, 
+        related_name='stock_freezes', 
+        verbose_name='所属商户'
+    )
+    product = models.ForeignKey(
+        basic_info_models.Product,
+        on_delete=models.PROTECT,
+        related_name='stock_freezes',
+        verbose_name='产品',
+    )
+    warehouse = models.ForeignKey(
+        basic_info_models.WareHouse,
+        on_delete=models.PROTECT,
+        related_name='stock_freezes',
+        verbose_name='仓库',
+    )
+    stock_detail = models.ForeignKey(
+        StockChangeDetail,
+        on_delete=models.PROTECT,
+        related_name='stock_freezes',
+        verbose_name='关联的库存变动明细',
+    )
+    quantity = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='冻结数量')
+    unit = models.IntegerField(
+        verbose_name='单位', 
+        choices=basic_info_models.ProductUnitEnum.choices,
+    )
+    status = models.IntegerField(
+        choices=StockFreezeStatusEnum.choices,
+        default=StockFreezeStatusEnum.FROZEN,
+        verbose_name='冻结状态',
+    )
+    frozen_by = models.ForeignKey(
+        'auth.User',
+        on_delete=models.PROTECT,
+        verbose_name='冻结操作人',
+    )
+    frozen_with = models.BigIntegerField(null=True, blank=True, verbose_name='冻结关联ID')
+    cancelled_by = models.ForeignKey(
+        'auth.User',
+        on_delete=models.PROTECT,
+        null=True,
+        blank=True,
+        related_name='cancelled_stock_freezes',
+        verbose_name='取消操作人',
+    )
+    completed_by = models.ForeignKey(
+        'auth.User',
+        on_delete=models.PROTECT,
+        null=True,
+        blank=True,
+        related_name='completed_stock_freezes',
+        verbose_name='成单操作人',
+    )
+    completed_at = models.DateTimeField(null=True, blank=True, verbose_name='成单时间')
+    completed_with = models.BigIntegerField(null=True, blank=True, verbose_name='成单关联ID')
+    cancelled_at = models.DateTimeField(null=True, blank=True, verbose_name='取消时间')
+    reason = models.TextField(blank=True, null=True, verbose_name='冻结原因')
+
+    def __str__(self):
+        return f'库存冻结 {self.id} - 产品: {self.product.name}'
+
+    class Meta:
+        verbose_name = '库存冻结'
+        verbose_name_plural = '库存冻结'