我有两个模型,一个是问题文本,第二个是用户和问题特定的答案。我的用户回答了很多问题,如果有问题,我该如何找到相应答案的索引?索引表示先前答案的数量/给定答案的位置。
更具体地说,当我查询以下内容时:
from django.db import models
from django.conf import settings
class Question(models.Model):
body = models.TextField()
class Answer(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, models.CASCADE)
question = models.ForeignKey(Question, models.CASCADE)
answer = models.TextField()
def getIndexOfAnswer(user, question):
answer = user.answer_set.filter(user=user, question=question).all().order_by("pk")
return answer.???index()???
如何获取给定用户的答案索引(例如,按PrimaryKey排序)?
答案 0 :(得分:0)
我拥有它!
def getIndexOfAnswer(user, question):
answer = user.answer_set.filter(question=question).get()
return user.answer_set.filter(pk__lte=answer.pk).count() - 1