表单字段选项在Django模板中循环时未显示。

huangapple
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英文:

Form field choices not showing when loop through in Django template

问题

forms.py

  1. SHIPPING_CHOICES = (
  2.     ('S', '标准'),
  3.     ('E', '快递'),
  4. )
  6. class Shipping(forms.Form):
  7.     shipping_option = forms.ChoiceField(widget=forms.RadioSelect, choices=SHIPPING_CHOICES)
  8.     cost = forms.CharField(required=False)

views.py

  1. class OrderSummaryView(LoginRequiredMixin, View):
  2.     
  3.     def get(self, *args, **kwargs):
  4.         try:
  5.             order = Order.objects.get(user=self.request.user, ordered=False)
  6.             form = Shipping()
  7.             context = {
  8.                 'object': order,
  9.                 'couponform': CouponForm(),
  10.                 'DISPLAY_COUPON_FORM': True,
  11.             }
  12.             return render(self.request, 'cart.html', context)
  13.         except ObjectDoesNotExist:
  14.             messages.info(self.request, "您没有活动订单")
  15.             return redirect('estores:home')
  16.     
  17.     def post(self, *args, **kwargs):
  18.         # ...

cart.html

  1. {% for value, name in form.shipping_option.choices %}
  2.     <div class="card">
  3.         <div class="card-header" id="heading-4">
  4.             <div class="card-title">
  5.                 <input id="{{ name }}" type="radio" name="shipping_option" value="{{ value }}" class="button" required>
  6.                 <label for="{{ name }}">{{ name }}</label>
  7.             </div>
  8.         </div>
  9.     </div>
  10. {% endfor %}

Note: I have translated the comments in the code as well for clarity.

英文:

forms.py

  1. SHIPPING_CHOICES = (
  2.     (&#39;S&#39;, &#39;standard&#39;),
  3.     (&#39;E&#39;, &#39;express&#39;),
  4. )
  7. class Shipping(forms.Form):
  8.     shipping_option = forms.ChoiceField(widget=forms.RadioSelect, choices=SHIPPING_CHOICES)
  9.     cost = forms.CharField(required=False)

views.py

  1. class OrderSummaryView(LoginRequiredMixin, View):
  2.     
  3.     def get(self, *args, **kwargs):
  4.         try:
  5.             order = Order.objects.get(user=self.request.user, ordered=False)
  6.             form = Shipping()
  7.             context = {
  8.                 &#39;object&#39; : order,
  9.                 &#39;couponform&#39;: CouponForm(),
  10.                 &#39;DISPLAY_COUPON_FORM&#39;: True,
  11.             }
  12.             return render(self.request, &#39;cart.html&#39;, context)
  13.         except ObjectDoesNotExist:
  14.             messages.info(self.request, &quot;You do not have an active order&quot;)
  15.             return redirect(&#39;estores:home&#39;)
  16.     
  17.     def post(self, *args, **kwargs):
  18.         # ...

cart.html

  1. {% for value, name in form.shipping_option.choices %}
  2. &lt;div class=&quot;card&quot;&gt;
  3.     &lt;div class=&quot;card-header&quot; id=&quot;heading-4&quot;&gt;
  4. 	    &lt;div class=&quot;card-title&quot;&gt;
  5.             &lt;input id=&quot;{{ name }}&quot; type=&quot;radio&quot; name=&quot;shipping_option&quot; value=&quot;{{ value }}&quot; class=&quot;button&quot; required&gt;
  6.             &lt;label for=&quot;{{ name }}&quot;&gt;{{ name }}&lt;/label&gt;
  7.         &lt;/div&gt;
  8. 	&lt;/div&gt;
  9. &lt;/div&gt;
  10. {% endfor %}

I don't know why but I have been trying to make it work but it won't work at all. I want to be able to loop through the choices available for shipping options.
So far I was able to do something like that for the payment option and it worked.

答案1

得分: 0

  1. 在 context 中传递 &#39;form&#39;: form。

  2. form.shipping_option 是一个 BoundField。
    要访问字段的 choices，请使用 form.shipping_option.field.choices。

英文:
  1. Pass &#39;form&#39;: form in context.
  1. form = Shipping()
  2. context = {
  3.     &#39;form&#39;: form,  # Add this
  4.     &#39;object&#39; : order,
  5.     &#39;couponform&#39;: CouponForm(),
  6.     &#39;DISPLAY_COUPON_FORM&#39;: True,
  7. }
  1. form.shipping_option is a BoundField.
    To access the field's choices, do form.shipping_option.field.choices.
  1. {% for value, name in form.shipping_option.choices       %}  # Change this
  2. {% for value, name in form.shipping_option.field.choices %}  # to this

huangapple
  • 本文由 发表于 2023年5月14日 07:09:57
  • 转载请务必保留本文链接：https://go.coder-hub.com/76245213.html
  • django
  • django-forms
  • django-templates
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