在基于Django类的视图中，从上下文数据设置初始表单域值 [英] Setting initial formfield value from context data in Django class based view

问题描述

我有一个激活URL，其中包含激活密钥（/ user / activate / 123123123）。这没有任何问题。 get_context_data可以将其移动到模板中。我想做的是将其作为关键字段的初始值，以便用户只需输入注册时创建的用户名和密码。

如何拉来自context或get（）的关键字没有将字段硬编码到模板中？

  class ActivateView（FormView）：
 template_name ='activate.html'
 form_class = ActivationForm 
 #initial = {'key'：'123123123'}<  - 这是有用的，但是没用
 
 success_url = 'profile'
 
 def get_context_data（self，** kwargs）：
 if'activation_key'in self.kwargs：
 context = super（ActivateView，self）.get_context_data（* * kwargs）
上下文['activation_key'] = self.kwargs ['activation_key'] 

这是我期望为我设置的值，但它不' t似乎工作
上面的上下文工作正常，但是我将不得不手动构建
表单中的模板非常unDjango。 

 self.initial ['key'] = self.kwargs ['activation_key'] 
 return context 
 else：
 return super（ActivateView，self ）.get_context_data（** kwargs）
  

解决方案

get_initial 提供动态初始参数：

 类ActivationView（FormView）： 
＃... 
 
 def get_initial（self）：
 return {'key'：self.kwargs ['activation_key']} 
  

I've got an activation url that carries the activation key ( /user/activate/123123123 ). That works without any issue. get_context_data can plop it into the template fine. What I want to do is have it as an initial value for the key field so the user only needs to enter username and password as created at registration.

How can I pull the key from context or get() without hardcoding the field into the template?

class ActivateView(FormView):
    template_name = 'activate.html'
    form_class = ActivationForm
    #initial={'key': '123123123'} <-- this works, but is useless

    success_url = 'profile'

    def get_context_data(self, **kwargs):
        if 'activation_key' in self.kwargs:
            context = super(ActivateView, self).get_context_data(**kwargs)
            context['activation_key'] = self.kwargs['activation_key']
            """
            This is what I would expect to set the value for me. But it doesn't seem to work.
            The above context works fine, but then I would have to manually build the 
            form in the  template which is very unDjango.
            """
            self.initial['key'] = self.kwargs['activation_key']  
            return context
        else:
            return super(ActivateView, self).get_context_data(**kwargs)

解决方案

You can override get_initial to provide dynamic initial arguments:

class ActivationView(FormView):
    # ...

    def get_initial(self):
        return {'key': self.kwargs['activation_key']}

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