fix: 检定记录校验bug

apps/em/serializers.py

@@ -22,8 +22,8 @@ class EcheckRecordSerializer(CustomModelSerializer):
         read_only_fields = EXCLUDE_FIELDS
 
     def validate(self, attrs):
-        attrs = super().validate(attrs)
         check_date = attrs['check_date']
         if EcheckRecord.objects.filter(check_date__gte=check_date, equipment=attrs['equipment']).exists():
             raise ValidationError('检定日期小于历史记录')
+        return attrs