有条件地显示带有 Crispy Forms 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；我只想在用户属于员工组时显示字段集.这在像这样的标准模板中很容易解决:

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:

<代码>{% if user.is_staff %}显示额外的东西{％ 万一 ％}

也许我错过了手册中的某些内容，但我不知道如何将{% if user.is_staff %}"之类的模板标签注入到脆皮表单布局中.如果我可以像下面这样使用虚构的Djangotag"来解决我的问题，那将是我的用例的理想选择:

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',
   ),
  )

有没有一种简单的方法可以用酥脆的形式做到这一点?

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，它不是很优雅，我仍在寻找更好的方法.

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

我也尝试为 if 语句创建简单的模板，并尝试了这个，HTML("{% include 'helpers/is_staff.html' %}"), 但渲染过程失败了.

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您的表单，然后在您的表单助手中使用它.像这样:

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))

然后在表单的 __init__ 方法中:

Then in your form's __init__ method:

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

最后在你的表单布局代码中:

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布局的末尾.文档 给出您可以使用其他选项来即时更新布局.

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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