django 常用功能

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1. 如何给viewset的request添加参数验证:
   首先，编写相应的serializer

class XPushSerializer(serializers.ModelSerializer):
    task_id = serializers.CharField(required=False, allow_blank=True)
    status = serializers.IntegerField(required=False)

    class Meta:
        model = models.X
        fields = '__all__'
    def validate(self, validated_data):
        ok, msg = util.validate_required(['title', 'text', 'production_mode'], validated_data)
        if not ok:
            raise serializers.ValidationError(msg)

        if validated_data.get('after_open') != '' and validated_data.get('after_open') not in ['go_url', 'go_app']:
            msg = "'after_open'应该为'go_app' 或 'go_url',收到'%s'" % validated_data.get('after_open')
            raise serializers.ValidationError(msg)
        if validated_data.get('production_mode') and validated_data.get('production_mode') not in ['false', 'true']:
            msg = "'production_mode'应该为'true' 或 'false',收到'%s'" % validated_data.get('production_mode')
            raise serializers.ValidationError(msg)
        if validated_data.get('jump_url') != '':
            if not (validated_data.get('jump_url').startswith('https://') or validated_data.get('jump_url').startswith('http://')):
                msg = "'jump_url'为https://或http://开头，收到" + validated_data.get('jump_url')
                raise serializers.ValidationError(msg)

其次，在viewset里使用它

        serializer = serializers.UmengPushSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)

2. 如何在viewset里分页

        queryset = self.paginate_queryset(queryset)
        return self.get_paginated_response(data)

3.如何给列表接口增加排序字段

class XViewSet(viewsets.ModelViewSet)
    filter_backends = (OrderingFilter, DjangoFilterBackend)
    permission_classes = (IsAuthenticated,)
    ordering_fields = ('bonus_money', 'bet_money')

对X的list: ?ordering=-bonus_money表示倒序

4. 对查询条件取或,与

# 与
queryset = X.objects.filter(name='ft',age=9)
# 或
from django.db.models import Q
queryset = X.objects.filter(Q(name='ft') | Q(age=9))

5. 查询条件大于和小于