init

backend/utils/utils.py

@@ -0,0 +1,30 @@
+import re
+from datetime import datetime
+from decimal import Decimal, ROUND_HALF_UP
+
+from rest_framework.exceptions import ValidationError
+from django.utils import timezone
+
+def validate_mobile(value):
+    if value and not re.findall(r"1\d{10}", value):
+        raise ValidationError('手机格式不正确')
+
+
+def validate_amount(value):
+    if value is None:
+        raise ValidationError('金额不能为空')
+    if value and value < 0:
+        raise ValidationError('金额不能为负')
+
+
+def to_cent(value):
+    if value is None:
+        value = 0
+    return Decimal(value).quantize(Decimal('.01'), rounding=ROUND_HALF_UP)
+
+# 定义一个小工具：从时间戳转换为 aware datetime（如果时间戳有效）
+def ts_to_aware(ts):
+    if ts:
+        naive_dt = datetime.fromtimestamp(ts)
+        return timezone.make_aware(naive_dt)
+    return None