Question

我在Django的一个小应用程序上工作，这是一个学生使用表单提问的网站，老师会从管理站点回答。问题是我无法显示答案，我不知道我做错了什么。我附上模型，模板和视图。

models.py

from django.db import models
from datetime import datetime
from django.db.models import CASCADE

    class Question(models.Model):
        title = models.CharField(max_length=120)
        question_content = models.TextField()
        date = models.DateTimeField(blank=True, null=True, default=datetime.now)

        class Meta:
            ordering = ('-date',)

        def __str__(self):
            return self.title


    class Answer(models.Model):
        question = models.ForeignKey(Question, related_name='answers', on_delete=CASCADE)
        answer_content = models.TextField()
        created = models.DateTimeField(auto_now_add=True)

        class Meta:
            ordering = ('-created',)

        def __str__(self):
            return 'Answer to {}'.format(self.question)

views.py

from django.core.paginator import Paginator, PageNotAnInteger, EmptyPage
from django.shortcuts import render, render_to_response
from django.views.decorators.csrf import csrf_exempt
from django.views.generic import ListView

from registration.forms import RegistrationForm, QuestionForm
from registration.models import *


def question(request):
    if request.method == 'POST':
        form = QuestionForm(request.POST)
        if form.is_valid():
            form.save()

        questions = Question.objects.all()
        return render(request, 'posturi.html', {'question': questions})

    else:
        # if post request is not true, returning blog
        form = QuestionForm()
        return render(request, 'blog.html', {'form': form})



def question_list(request):
    questions = Question.objects.all()
    answers = question.answers //  this is the problem i can not solve


    paginator = Paginator(questions, 6)  # 6 question in each page
    page = request.GET.get('page')
    try:
        questions = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer deliver the first page
        questions = paginator.page(1)
    except EmptyPage:
        # If page is out of range deliver last page of results
        questions = paginator.page(paginator.num_pages)

    return render(request, 'posturi.html', {'question': questions, 'answer': answers})

posturi.html

<div class="container">
    <div class="row justify-content-center col-md-10 col-md-offset-1">
    {% for questions in question %}
        <div class=" card ">
            <div class="card-header"><h3>{{ questions.title }} :</h3></div>
            <hr>
            <div class="card-text">{{ questions.question_content | linebreaks }}</div>
            <div class="card-footer"><h4>{{ questions.date }}</h4></div>
            {% for answers in question.answer_set.all %}
                <div class="card-header"><h3>Raspuns la  : "{{ answers.question.title }}"</h3></div>
                <hr>
                <div class="card-text">{{ answers.answer_content | linebreaks }}</div>
                <div class="card-footer"><h4>{{ answers.created }}</h4></div>
                {% empty %}
                <div class="card-text"><h4>Fara raspuns.</h4></div>
            {% endfor %}
        </div>
    {% endfor %}
    </div>
</div>

我得到的错误是：'function'对象没有属性'answer'。任何人都可以帮我理解如何显示答案吗？我读了很多文章，但没有任何帮助。谢谢。

Answer 1

应该是question.answers.all（）而不仅仅是question.answers。有关详细信息，请查看here。

Answer 2

question是您在views.py中定义的功能，这就是错误说明的原因

＆＃39;功能＆＃39;对象没有属性＆＃39;回答＆＃39;

您可能希望使用上一行中定义的问题

def question_list(request):
    questions = Question.objects.all()
    answers = questions.answers

Answer 3

感谢您的时间；终于我找到了正确的答案：为了得到显示的答案，我使用'select_related（）'，如：

def问题列表（请求）：问题= Question.objects.all（）答案= Answer.objects.select_related（）

返回渲染（请求，'posturi.html'，{'question'：问题，'answer'：答案}

和在模板中： {％代表答案%%} .... {％endfor％}

也许有人需要这个。

在Django网站上显示答案

3 个答案: