feat: payment order and receipt order

business/models.py

@@ -316,3 +316,107 @@ class SalesOrderItem(ModelBase):
 
     def total_amount(self):
         return round(self.price * self.real_quantity(), 2)
+
+
+class PaymentOrderStatusEnum(models.IntegerChoices):
+    PENDING = 1, '审批中'
+    APPROVED = 2, '审批通过'
+    CANCELLED = 3, '作废'
+
+
+class PaymentOrder(OrderDirectionMixin, OrderCounterpartyMixin, ModelBase):
+    id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey(
+        basic_info_models.Merchant,
+        on_delete=models.PROTECT,
+        related_name='payment_orders',
+        verbose_name='所属商户',
+    )
+    supplier = models.ForeignKey(
+        basic_info_models.Supplier,
+        on_delete=models.PROTECT,
+        related_name='payment_orders',
+        verbose_name='供应商',
+    )
+    payment_date = models.DateField(verbose_name='付款日期')
+    amount = models.DecimalField(max_digits=15, decimal_places=2, verbose_name='金额')
+    operator = models.ForeignKey(
+        basic_info_models.Employee,
+        on_delete=models.PROTECT,
+        related_name='payment_orders',
+        verbose_name='经办人',
+    )
+    status = models.IntegerField(
+        choices=PaymentOrderStatusEnum.choices,
+        default=PaymentOrderStatusEnum.PENDING,
+        verbose_name='状态',
+    )
+    remarks = models.TextField(blank=True, null=True, verbose_name='备注')
+
+    class Meta:
+        verbose_name = '付款单'
+        verbose_name_plural = '付款单'
+
+    def __str__(self):
+        return f'付款单 {self.id} - {self.supplier.name}'
+
+    def get_total_amount(self) -> Decimal:
+        return self.amount
+
+    def get_direction(self) -> int:
+        return -1
+
+    def get_counterparty_field_name(self) -> str:
+        return 'supplier'
+
+
+class ReceiptOrderStatusEnum(models.IntegerChoices):
+    PENDING = 1, '审批中'
+    APPROVED = 2, '审批通过'
+    CANCELLED = 3, '作废'
+
+
+class ReceiptOrder(OrderDirectionMixin, OrderCounterpartyMixin, ModelBase):
+    id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey(
+        basic_info_models.Merchant,
+        on_delete=models.PROTECT,
+        related_name='receipt_orders',
+        verbose_name='所属商户',
+    )
+    customer = models.ForeignKey(
+        basic_info_models.Customer,
+        on_delete=models.PROTECT,
+        related_name='receipt_orders',
+        verbose_name='客户',
+    )
+    receipt_date = models.DateField(verbose_name='收款日期')
+    amount = models.DecimalField(max_digits=15, decimal_places=2, verbose_name='金额')
+    operator = models.ForeignKey(
+        basic_info_models.Employee,
+        on_delete=models.PROTECT,
+        related_name='receipt_orders',
+        verbose_name='经办人',
+    )
+    status = models.IntegerField(
+        choices=ReceiptOrderStatusEnum.choices,
+        default=ReceiptOrderStatusEnum.PENDING,
+        verbose_name='状态',
+    )
+    remarks = models.TextField(blank=True, null=True, verbose_name='备注')
+
+    class Meta:
+        verbose_name = '收款单'
+        verbose_name_plural = '收款单'
+
+    def __str__(self):
+        return f'收款单 {self.id} - {self.customer.name}'
+
+    def get_total_amount(self) -> Decimal:
+        return self.amount
+
+    def get_direction(self) -> int:
+        return -1
+
+    def get_counterparty_field_name(self) -> str:
+        return 'customer'