动态形式的Django FormWizard [英] Django FormWizard with dynamic forms

问题描述

我想实现一个简单的2部分FormWizard。
Form 1将通过动态生成这样的东西：

I want to implement a simple 2 part FormWizard. Form 1 will by dynamically generated something like this:

class BuyAppleForm(forms.Form):
   creditcard = forms.ChoiceField(widget = forms.RadioSelect)
   type = forms.ChoiceField(widget = forms.RadioSelect)
   def __init__(self,*args, **kwargs):
        user = kwargs['user']
        del kwargs['user']

        super(BuyAppleForm, self).__init__(*args, **kwargs)

        credit_cards = get_credit_cards(user)
        self.fields['creditcard'].choices = [(card.id,str(card)) for card in credit_cards]

        apple_types= get_types_packages()
        self.fields['type'].choices = [(type.id,str(type)) for type in apple_types]

这将动态创建一个包含可用选项列表的表单。

This will dynamically create a form with lists of available choices.

我的第二个表单，我实际上不需要输入。我只想显示包含信用卡信息，苹果信息和金额（总计，税金，运费）的确认屏幕。一旦用户点击OK，我想要苹果购买开始。

My second form, I actually want no input. I just want to display a confirmation screen containing the credit card info, apple info, and money amounts (total, tax, shipping). Once user clicks OK, I want the apple purchase to commence.

我能够通过传入kwargs中的request.user对象来实现单一的表单方式。但是，使用FormWizard，我无法弄清楚这一点。

I was able to implement the single form way by passing in the request.user object in the kwargs. However, with the FormWizard, I cannot figure this out.

我遇到问题是错误的，FormWizard不是正确的方法吗？如果是，Form __ init __ 方法如何从HTTP请求中访问用户对象？

Am I approaching the problem wrong and is the FormWizard not the proper way to do this? If it is, how can the Form __init__ method access the user object from the HTTP request?

推荐答案

我不知道如果回答自己的问题是StackOverflow上可以接受的行为，这里是我自己的问题的解决方案。

I don't know if answering one's own question is an acceptable behaviour on StackOverflow, here is my solution to my own problem.

首先，转换FormWizard。

First, ditch FormWizard.

我有一个表单。
两个视图： buy_apples 和 buy_apples_confirm

第一个视图只处理GET。它打印出未绑定的表单，并带有操作转到第二个视图的URL。

First view only handles GET. It prints out the unbound form, with an action to go to the URL of the second view.

第二个视图检查是否存在名为confirm的POST参数。如果它不存在（因为它不是第一次加载视图时）：

The second view checks for the presence of a POST parameter named "confirm". If it is not present (as it is not when the view is loaded the first time) it:

1. 调整所有字段上的小部件被隐藏输入


2. 写出提供订单摘要的模板。此模板还会将一个名为confirm的隐藏字段设置为1（即使此窗体中不存在该字段）

当用户点击购买苹果，表单被提交回来，并且再次调用 buy_apples_confirm 视图。这一次，一个POST参数叫做确认，所以我们实际上处理了采购交易，用户得到了他的苹果。

When the user clicks to buy the apples, the form is submitted back and the buy_apples_confirm view is invoked one more time. This time, a POST parameter called "confirm" is present, so we actually process the purchase transaction and the user gets his apples.

我欢迎任何关于这个方法的批评，更好的处理情况的方法。我是Django的新手，发现有很多不同的方法来解决问题。我想从最好的学习。

I welcome any critiques on this method or better ways of handling the situation. I am new to Django and find that there are many different ways of approaching a problem. I want to learn from the best though.

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