在Django中批量插入

Question

我有一个Django应用和postgres数据库。我正在像这样批量插入：

class TestListSerializer(serializers.ListSerializer):
    """
    This class only be used once we are dealing with multiple object creation
    in a list fashion by having only single query for the whole insert.
    :returns: the number of inserted records.
    """
    def create(self, validated_data):
        records = [test(**item) for item in validated_data]
        if test.objects.bulk_create(records):
            return len(records)
        else:
            return 0


class TestSerializer(serializers.ModelSerializer):
    class Meta:
        model = test
        fields = ('date',
                  'arg1',
                  'arg2',
                  'arg3',
                  'arg4',
                  'arg5')
        list_serializer_class = TestListSerializer

到目前为止，它工作正常。但是，我想避免基于日期的重复数据，所以我将日期声明为唯一的，但这只会导致对INSERT查询之前的每个单独的行条目进行多次选择，这在批量处理中效率不高。我们如何处理此类问题。欢迎提出建议。谢谢。