How can i make shuffle in django Forms?

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英文:

How can i make shuffle in django Forms?

问题

我有一个类似于问答游戏的项目，但我需要在问题中对答案进行随机排序。

这是我的代码：

template.html

  1. <form method="post">
  2.     {% csrf_token %}
  3.     <h3>{{ current_question.text }}</h3>
  4.     {{ form.selected_answer }}
  5.     <button type="submit">Next</button>
  6. </form>

views.py

  1. if request.method == 'POST':
  2.     form = QuestionForm(request.POST, question=current_question)
  3.     if form.is_valid():
  4.         user_answer = form.cleaned_data['selected_answer']
  5.         user_test.useranswer_set.update_or_create(question=current_question,
  6.                                                   defaults={'selected_answer': user_answer})
  7.         return redirect('test', test_id=test_id)
  8. else:
  9.     form = QuestionForm(question=current_question)

这是我的Django表单。我尝试了这样的方式，但它不起作用：

  1. from django import forms
  2. from .models import Answer
  3. import random
  4. from django.db.models.query import QuerySet
  6. class QuestionForm(forms.Form):
  7.     selected_answer = forms.ModelChoiceField(
  8.         queryset=Answer.objects.none(),
  9.         widget=forms.RadioSelect,
  10.         empty_label=None
  11.     )
  13.     def __init__(self, *args, question=None, **kwargs):
  14.         super().__init__(*args, **kwargs)
  15.         if question:
  16.             answers = list(question.answer_set.all())
  17.             random.shuffle(answers)
  18.             self.fields['selected_answer'].queryset = answers
英文:

I have got a project like quiz. But i need to shuffle the answers in questions.
here is my code:
template.html

  1.  &lt;form method=&quot;post&quot;&gt;
  2.     {% csrf_token %}
  3.     &lt;h3&gt;{{ current_question.text }}&lt;/h3&gt;
  4.     {{ form.selected_answer }}
  5.      &lt;button type=&quot;submit&quot;&gt;Next&lt;/button&gt;
  6.   &lt;/form&gt;

views.py

  1.         if request.method == &#39;POST&#39;:
  2.             form = QuestionForm(request.POST, question=current_question)
  3.             if form.is_valid():
  4.                 user_answer = form.cleaned_data[&#39;selected_answer&#39;]
  5.                 user_test.useranswer_set.update_or_create(question=current_question,
  6.                                                           defaults={&#39;selected_answer&#39;: user_answer})
  7.                 return redirect(&#39;test&#39;, test_id=test_id)
  8.         else:
  9.             form = QuestionForm(question=current_question)

There is my django form. I try like this but it doesn't work:

  1. from django import forms
  2. from .models import Answer
  3. import random
  4. from django.db.models.query import QuerySet
  7. class QuestionForm(forms.Form):
  8.     selected_answer = forms.ModelChoiceField(
  9.         queryset=Answer.objects.none(),
  10.         widget=forms.RadioSelect,
  11.         empty_label=None
  12.     )
  14.     def __init__(self, *args, question=None, **kwargs):
  15.         super().__init__(*args, **kwargs)
  16.         if question:
  17.             answers = list(question.answer_set.all())
  18.             random.shuffle(answers)
  19.             self.fields[&#39;selected_answer&#39;].queryset = answers

答案1

得分: 1

如果答案的数量很少，这里可能是这种情况，你可以使用.order_by('?'）来处理。

  1. class QuestionForm(forms.Form):
  2.     selected_answer = forms.ModelChoiceField(
  3.         queryset=Answer.objects.none(), widget=forms.RadioSelect, empty_label=None
  4.     )
  6.     def __init__(self, *args, question=None, **kwargs):
  7.         super().__init__(*args, **kwargs)
  8.         if question:
  9.             self.fields[
  10.                 'selected_answer'
  11.             ].queryset = question.answer_set<b>.order_by('?')</b>
英文:

If the number of answers is small, which is likely the case here, you can work with .order_by(&#39;?&#39;)&nbsp;<sup>[Django-doc]</sup>:

<pre><code>class QuestionForm(forms.Form):
selected_answer = forms.ModelChoiceField(
queryset=Answer.objects.none(), widget=forms.RadioSelect, empty_label=None
)

  1. def __init__(self, *args, question=None, **kwargs):
  2.     super().__init__(*args, **kwargs)
  3.     if question:
  4.         self.fields[
  5.             &#39;selected_answer&#39;
  6.         ].queryset = question.answer_set&lt;b&gt;.order_by(&#39;?&#39;)&lt;/b&gt;&lt;/code&gt;&lt;/pre&gt;

huangapple
  • 本文由 发表于 2023年8月8日 20:06:14
  • 转载请务必保留本文链接：https://go.coder-hub.com/76859397.html
  • django
  • python
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