为Django表单选择小部件添加其他选项 [英] Add additional options to Django form select widget

问题描述

我有一个表单用于构造一个queryeset过滤器。该表单从数据库中提取项目状态选项。但是，我想添加其他选项，例如所有现场促销...所以选择框会看起来像：

• 所有促销*


• 所有即时促销*


• 草稿


• 提交


• 已接受


• 已报告


• 已选中


• 所有已完成的促销*


• 已关闭


• 已取消

这里'*'是我'/ />

这是可能吗？

 code> class PromotionListFilterForm（forms.Form）：
 promotion_type = forms.ModelChoiceField（label =Promotion type，queryset = models.PromotionType.objects.all（），widget = forms.Select（attrs = {'class'：'selector'}））
 status = forms.ModelChoiceField（label =Status，queryset = models.WorkflowStatus.objects.all（），widget = forms.Select（attrs = class'：'selector'}））
 ... 
 ret ailer = forms.CharField（label =Retailer，widget = forms.TextInput（attrs = {'class'：'textbox'}））
  

解决方案

您将无法使用ModelChoiceField。您需要恢复为标准的ChoiceField，并在窗体的 __ init __ 方法中手动创建选项列表。类似于：

  class PromotionListFilterForm（forms.Form）：
 promotion_type = forms.ChoiceField（label =促销类型，choices =（），
 widget = forms.Select（attrs = {'class'：'selector'}））
 .... 
 
 EXTRA_CHOICES = [
（'AP'，'所有促销'），
（'LP'，'Live Promotions'），
（'CP'，'完成促销'），
] 
 
 def __init __（self，* args，** kwargs）：
 super（PromotionListFilterForm，self）.__ init __（* args，** kwargs）
 choices = [（pt。 id，unicode（pt））for pt in PromotionType.objects.all（）] 
 choices.extend（EXTRA_CHOICES）
 self.fields ['promotion_type']。choices = choices 
  

你还需要在窗体的 clean（）方法来捕获这些额外的选项并适当地处理它们。

I have a form which I use to construct a queryeset filter. The form pulls in the project status options from the database. However, I wanted to add additional options, for example "All live promotions" ... so the select box would then look something like:

• All Promotions *
• All Live Promotions *
• Draft
• Submitted
• Accepted
• Reported
• Checked
• All Completed Promotions *
• Closed
• Canceled

Here the '*' are the ones I'd want to add and the others come from the database.

Is this possible?

class PromotionListFilterForm(forms.Form):
    promotion_type = forms.ModelChoiceField(label="Promotion Type", queryset=models.PromotionType.objects.all(), widget=forms.Select(attrs={'class':'selector'}))
    status = forms.ModelChoiceField(label="Status", queryset=models.WorkflowStatus.objects.all(), widget=forms.Select(attrs={'class':'selector'})) 
    ...
    retailer = forms.CharField(label="Retailer",widget=forms.TextInput(attrs={'class':'textbox'}))

解决方案

You won't be able to use a ModelChoiceField for that. You'll need to revert to a standard ChoiceField, and create the options list manually in the form's __init__ method. Something like:

class PromotionListFilterForm(forms.Form):
    promotion_type = forms.ChoiceField(label="Promotion Type", choices=(),
                                       widget=forms.Select(attrs={'class':'selector'}))
    ....

    EXTRA_CHOICES = [
       ('AP', 'All Promotions'),
       ('LP', 'Live Promotions'),
       ('CP', 'Completed Promotions'),
    ]

    def __init__(self, *args, **kwargs):
        super(PromotionListFilterForm, self).__init__(*args, **kwargs)
        choices = [(pt.id, unicode(pt)) for pt in PromotionType.objects.all()]
        choices.extend(EXTRA_CHOICES)
        self.fields['promotion_type'].choices = choices

You'll also need to do something clever in the form's clean() method to catch those extra options and deal with them appropriately.

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