如何在CreateView中覆盖表单字段 [英] How to override form field in CreateView

问题描述

在模型表单中，我可以像这样覆盖表单字段

In model form I can override form field like so

class waypointForm(forms.ModelForm):
    def __init__(self, user, *args, **kwargs):
        super(waypointForm, self).__init__(*args, **kwargs)
        self.fields['waypoints'] = forms.ModelChoiceField(queryset=Waypoint.objects.filter(user=user))

如何使用相同的功能在基于类的视图 CreateView 中，以便我可以覆盖表单字段？

How can I use the same functionality in class based view CreateView, so that I can override form field?

我尝试了 get_form_kwargs 和 get_form 都是徒劳的。我需要创建模型表单吗？

I tried get_form_kwargs and get_form but all in vain. Do I need to create a model form?

推荐答案

您可以覆盖 get_form_kwargs 并将用户传递给 kwargs 词典。然后在 __ init __（）方法中，在表单上设置字段。

You can override the get_form_kwargs and pass the user to kwargs dictionary. Then in your __init__() method, set your field on the form.

views.py

通过 kwargs 中的用户覆盖 get_form_kwargs（）。

class MyCreateView(CreateView):

    form_class = waypointForm

    def get_form_kwargs(self):
        kwargs = super(MyCreateView, self).get_form_kwargs()
        kwargs['user'] = self.request.user # pass the 'user' in kwargs
        return kwargs 

forms.py

现在，覆盖 __ init __（）方法。在其中，从 kwargs 弹出 user 键，然后使用该值创建字段。

Now, override the __init__() method. In that, pop the user key from kwargs and use that value to create your field.

class waypointForm(forms.ModelForm):

    def __init__(self, *args, **kwargs): 
        user = kwargs.pop('user', None) # pop the 'user' from kwargs dictionary      
        super(waypointForm, self).__init__(*args, **kwargs)
        self.fields['waypoints'] = forms.ModelChoiceField(queryset=Waypoint.objects.filter(user=user)) 

这篇关于如何在CreateView中覆盖表单字段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！