我正在尝试访问表中的列。该表有两个外键。
from django.db import models
from django.contrib.auth.models import User
from django.utils import timezone
from django.db.models.signals import post_save
class Question(models.Model):
question_id = models.IntegerField(default=0, unique=True)
question_text = models.CharField(max_length=200)
pub_date = models.DateTimeField('date published')
def __str__(self):
return self.question_text
class Answer(models.Model):
question = models.ForeignKey(Question, on_delete=models.CASCADE)
answer_text = models.IntegerField()
def __str__(self):
return str(self.answer_text)
class UserProfile(models.Model):
user=models.OneToOneField(User,on_delete=models.CASCADE)
image=models.ImageField(upload_to='',blank=True)
points = models.IntegerField(default=0)
def __str__(self):
return self.user.username
def create_profile(sender, **kwargs):
if kwargs['created']:
user_profile = UserProfile.objects.create(user=kwargs['instance'])
post_save.connect(create_profile, sender=User)
class Points_Tally(models.Model):
userid=models.ForeignKey(User,on_delete=models.CASCADE)
questions_id=models.ForeignKey(Question,on_delete=models.CASCADE)
status=models.IntegerField(default=0)
def __str__(self):
return str(self.userid)
'''
如果状态为零，则用户可以提交问题的答案，然后分数将增加，并且状态将被设置为1，因此，如果用户再次尝试回答问题，他将无法执行该操作。 / p>
'''
def detail(request, question_id,pk=None):
question_data=get_object_or_404(Question,pk=question_id)
if pk:
user = User.objects.get(pk=pk)
else:
user = request.user
form = forms.ValidateAnswerForm()
points_tally_object = Points_Tally.objects.all()
entire_data=[]
for items in points_tally_object:
entire_data.append(items.questions_id.question_id)
#this is for the answer
stored_ans = Answer.objects.all()
answer_list = []
for k in stored_ans:
answer_list.append(k.answer_text)
if request.method == 'POST':
form = forms.ValidateAnswerForm(request.POST)
if form.is_valid():
print("validation successful")
print(entire_data,"is the entire data")
print(user,"This is the signed in user")
print(user.userprofile.points)
answer_given = form.cleaned_data['myanswers']
print("answer",form.cleaned_data['myanswers'])
print(answer_given)
print(question_id,"is question_id")
print("This is the user id",user.id)
print("-------------Points tally and questions_id ")
print(type(question_id),"Is the type of question_id")
print(Points_Tally.status,"Is the type of question status")
#user.userprofile.points+=10
#user.userprofile.save()
if Points_Tally.status==0:
for i in answer_list:
if (answer_given==i):
print('Correct answer', i, '---', answer_given)
print("These are the points of the user before submitting answer", user.userprofile.points)
#question.userid=user.id
#question.questions_id=question_id
user.userprofile.points += 10
user.userprofile.save()
points_tally_object.status=1
points_tally_object.save()
print("This is my question status:",Points_Tally.status)
messages.success(request, "Your answer is correct")
break
else:
print("Wrong answer ")
print('answer mismatched', i, '---', answer_given)
if (Points_Tally.status==0):
messages.error(request, "Please try again: Incorrect answer")
else:
print("You have already submitted answer to this:::",Points_Tally.status,"this is the status")
messages.error(request, "You have already submitted answer to this question,Please try another question")
else:
print("I am in else of form is invalid")
#return redirect('account:detail', pk=question_id)
else:
print("I am in else")
return render(request, 'account/detail.html', {'form': form, 'question': points_tally_object,'question_data':question_data})
'''
答案 0 :(得分：0)
您必须选择一个特殊对象，然后获取所需的列。您刚刚提到了Models名称，并试图获取该列。那是错的。 这与外键无关。