在原始查询 Django 中将文字百分号 (%) 添加到我的计算中

Question

我在查询中添加百分比符号时出现错误：

Exception Type:IndexError
Exception Value:tuple index out of range.

views.py

class groupdatagercekzamanliveriListView(ListAPIView):
query2 = gercekzamanlıveri.objects.raw("""SELECT 1 as id,
CONCAT(ROUND((SUM(net_uretim_miktari)/SUM(teorik_uretim_miktari)::float*100)),'%') as tee, FROM tee_gercekzamanlıveri
INNER JOIN tee_isyerleri ON tee_gercekzamanlıveri.isyeri_id= tee_isyerleri.id
INNER JOIN tee_malzemeler ON tee_gercekzamanlıveri.malzeme_id= tee_malzemeler.id
INNER JOIN tee_isyerimalzemebilgileri ON tee_isyerimalzemebilgileri.isyeri_id= tee_gercekzamanlıveri.isyeri_id 
AND tee_isyerimalzemebilgileri .malzeme_id = tee_gercekzamanlıveri.malzeme_id) as a GROUP BY isyeri_id""")

    queryset = query2
    serializer_class = groupdatagercekzamanlıveriserializer

serializer.py

class groupdatagercekzamanlıveriserializer(serializers.Serializer):

    id = serializers.IntegerField()
    tee = serializers.CharField()

当我使用 "a" 作为 "%" 的字符串时没问题：

CONCAT(ROUND((SUM(net_uretim_miktari)/SUM(teorik_uretim_miktari)::float*100)),'a') as tee

结果： "tee": 80a

Answer 1

根据 documentation（GIYF 首次点击 django sql "%" - 至少对我而言）你必须将它加倍才能将字符识别为文字，例如：

--
CONCAT(
  ROUND(
    (SUM(net_uretim_miktari) / SUM(teorik_uretim_miktari)::float * 100)
  ),
  '%%'
) as tee, FROM tee_gercekzamanlıveri
--

在原始查询 Django 中将文字百分号 (%) 添加到我的计算中

Add Literal Percent Sign (%) to my calculation inside raw query Django

django

postgresql

concat

django-rest-framework