有条件地显示带有脆皮表单的字段集 [英] Conditionally display a Fieldset with Crispy Forms

问题描述

我想在使用Crispy Forms时做一些简单的事情；我只想在用户属于人员组时才显示Fieldset。可以在这样的标准模板中轻松解决此问题：

I want to do something simple while using Crispy Forms; I want show a Fieldset only if the user belongs to the staff group. This is easily solved in a standard templates like this:


{％user.is_staff％}
显示额外的内容东西
{％endif％}


也许我错过了手册中的内容，但是我看不到我如何才能将像 {％if user.is_staff％}这样的模板标签注入到松脆的Layout中。如果我可以使用以下虚构的 Djangotag来解决问题，则对于我的用例来说将是理想的选择：

Maybe I missed something in the manual, but I don't see how I can just inject a template tag like "{% if user.is_staff %}" into the crispy form Layout. It would be ideal for my use case if I could something like the following where I use a fictitious 'Djangotag' to solve my problem:

self.helper.layout = Layout(
   Fieldset(
       'Section One',
       'name',
       'description',
   ),
   Djangotag('{% if user.is_staff %}'),
   Fieldset(
       'Conditional Fieldset',
       'field1',
       'field2',
   ),
   Djangotag('{% endif %}'),      
   Fieldset(
       'More Details',
       'detail1',
       'detail2',
   ),
  )

是否有一种简便的方法来处理脆脆的表格？

Is there an easy way to do this with crispy forms?

注意：我已经实现了 self.user = kwargs.pop（'user'） 方法，它不是很好，我还在寻找更好的东西。

Note: I already implemented the self.user = kwargs.pop('user') approach and it's not very elegant, I am still looking for something better.

我还尝试为if语句创建简单的模板，并尝试 HTML（ {％include'helpers / is_s taff.html’％}），但渲染过程失败。

I also tried created simple templates for the if statements, and tried this, HTML("{% include 'helpers/is_staff.html' %}"), but the render process fails.

推荐答案

您可以将请求上下文从视图传递到表单，然后在表单帮助器中使用它。像这样的东西：

You can pass the request context to your form from the view, and then use this in your form helper. Something like this:

在创建表单的视图函数中：

In the view function that creates the form:

form = MyForm(request.POST, user=getattr(request, 'user', None))

然后以表单的 __ init __ 方法：

def __init__(self, *args, **kwargs):
    self.user = kwargs.pop('user', None)
    super(MyForm, self).__init__(args, kwargs)

最后在您的表单布局代码中：

And finally in your form layout code:

if user and user.is_staff:
    self.helper.layout.append(Fieldset(
        'Conditional Fieldset',
        'field1',
        'field2',
    ),

我刚刚将此字段集附加到了布局的末尾。 文档给出了您还可以选择其他方式来动态更新布局。

I've just appended this fieldset to the end of the layout. The documentation gives you other options for updating layouts on the fly.

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