feat: added print_count api, added merchant setting model, added manual mode setting for purchase order

basic_info/models.py

@@ -452,3 +452,52 @@ class VehicleTransportRecord(ModelBase):
     class Meta:
         verbose_name = '司机车次'
         verbose_name_plural = '司机车次'
+
+
+class MerchantSettingTypeEnum(models.TextChoices):
+    """商户设置类型枚举"""
+    STR = 'str', '字符串'
+    INT = 'int', '整数'
+    FLOAT = 'float', '浮点数'
+    BOOL = 'bool', '布尔值'
+
+
+class MerchantSetting(ModelBase):
+    id = models.BigAutoField(primary_key=True)
+    merchant = models.ForeignKey('Merchant', on_delete=models.PROTECT, related_name='settings', verbose_name='所属商户')
+    key = models.CharField(max_length=100, verbose_name='设置项')
+    type = models.CharField(
+        max_length=20,
+        choices=MerchantSettingTypeEnum.choices,
+        default=MerchantSettingTypeEnum.STR,
+        verbose_name='设置类型',
+    )
+    val_str = models.CharField(max_length=100, null=True, blank=True, verbose_name='设置值(字符串)')
+    val_int = models.IntegerField(null=True, blank=True, verbose_name='设置值(整数)')
+    val_float = models.FloatField(null=True, blank=True, verbose_name='设置值(浮点数)')
+    val_bool = models.BooleanField(null=True, blank=True, verbose_name='设置值(布尔值)')
+    description = models.TextField(blank=True, null=True, verbose_name='备注')
+
+    @property
+    def value(self):
+        if self.type == MerchantSettingTypeEnum.STR:
+            return self.val_str
+        elif self.type == MerchantSettingTypeEnum.INT:
+            return self.val_int
+        elif self.type == MerchantSettingTypeEnum.FLOAT:
+            return self.val_float
+        elif self.type == MerchantSettingTypeEnum.BOOL:
+            return self.val_bool
+        raise ValueError(f'Invalid setting type: {self.type}')
+
+    def __str__(self):
+        return f'{self.merchant.name} - {self.key}'
+
+    class Meta:
+        verbose_name = '商户设置'
+        verbose_name_plural = '商户设置'
+
+
+class MerchantSettingKeyEnum(models.TextChoices):
+    """商户设置项枚举"""
+    AUTO_CREATE_STOCK_CHANGE_TASKS = 'auto_create_stock_change_tasks', '自动创建出入库记录任务'