如何在django中为choicefield设置一个值答案

【问题标题】：how to set a value for choicefield in django如何在django中为choicefield设置一个值
【发布时间】：2013-08-08 11:09:59
【问题描述】：

我有一个地址表格，其中包含国家选择字段。我想在表单加载之前设置一个值。我怎么能那样做？这是表格：

from django import forms
from django.utils.translation import gettext as _

from django_countries import countries
from core.api import NcpAPI


class AddressForm(forms.Form):
    # first_name        = forms.CharField(label=_("First Name"), widget=forms.TextInput(attrs={'class':'form-text required'}))
    # last_name         = forms.CharField(label=_("Last Name"), widget=forms.TextInput(attrs={'class':'form-text required'}))
    # company       = forms.CharField(label=_("Company"), widget=forms.TextInput(attrs={'class':'form-text required'}))
    street          = forms.CharField(label=_("Street/PoBox"), widget=forms.TextInput(attrs={'class':'form-text required'}))
    address1        = forms.CharField(label=_("Address1"), widget=forms.TextInput(attrs={'class':'form-text required'}))
    address2        = forms.CharField(required=False, label=_("Address2"), widget=forms.TextInput(attrs={'class':'form-text'}))
    address3        = forms.CharField(required=False, label=_("Address3"), widget=forms.TextInput(attrs={'class':'form-text'}))
    city            = forms.CharField(label=_("City"), widget=forms.TextInput(attrs={'class':'form-text required'}))
    postal_code     = forms.CharField(label=_("Postal code"), widget=forms.TextInput(attrs={'class':'form-text required'}))
    country         = forms.ChoiceField(label=_("Country"), choices=countries.COUNTRIES, widget=forms.Select())

【问题讨论】：

标签： django python-2.7 django-forms django-1.5 choicefield

【解决方案1】：

country = forms.ChoiceField(label=_("Country"), 
          choices=countries.COUNTRIES, widget=forms.Select(), initial= 'us')

或者你可以在调用表单构造函数时启动它

form = AddressForm(initial={'country': 'us'})

【讨论】：

更易于维护：forms.ChoiceField(label=_("Country"), choice=countries.COUNTRIES, widget=forms.Select(), default = countries.COUNTRIES[0]) 例如，如果有一天你的选择改变了，Django 不会崩溃 :)
@Ricola3D 默认用于模型，对于表单它是初始的
@suhail，当我使用 sessionwizard 时，您的代码对我不起作用。对不起，我忘了提。