python - Django:在模板中显示所选多选字段的值

Question

我正在尝试找到一种方法来显示多选字段的选定/初始值的文本。

我的问题与这个问题类似，只是我不想要值，我想要它对应的选项文本:

Display value of a django form field in a template?

例如，如果我有一个包含以下内容的表单:

GENDER_CHOICES = (
    ('male', _('Men')),
    ('female', _('Women')),
)

genders = forms.MultipleChoiceField(choices=GENDER_CHOICES,
    widget=widgets.CheckboxSelectMultiple(),
    initial=[gender[0] for gender in GENDER_CHOICES])

然后在我的模板中我可以做:

{{ form.genders.value }}

获取选定选项的数组(即 [u'male', u'female']。但是，我想以某种方式从键中查找字符串值(即“Men”，“Women”)，一些东西喜欢:

{% for key in form.genders.value %}
    {{ form.genders.choices.key }}
{% endfor %}

我找不到实现此功能的方法。我如何使用 Django 1.3 实现此目的？

ps - 这是一个简短的示例，但我需要使用更大的动态列表来实现，这些列表禁止使用多个 if 语句(即“if key == 'male' 'Men' ... 等”)

Answer 1

1. 向表单添加一个方法，返回您想要的列表

2. 从模板中调用

看起来像这样:

def selected_genders_labels(self):
    return [label for value, label in self.fields['genders'].choices if value in self['genders'].value()]

在行动中:

In [1]: from testapp.views import XForm; f = XForm(initial={'genders': ['male', 'female']}); print f.selected_genders_labels()
['Men', 'Women']

In [2]: from testapp.views import XForm; f = XForm(initial={'genders': ['female']}); print f.selected_genders_labels()
['Women']

In [3]: from testapp.views import XForm; f = XForm(initial={'genders': []}); print f.selected_genders_labels()
[]

In [4]: from testapp.views import XForm; f = XForm(); print f.selected_genders_labels()
['Men', 'Women']

所以你可以像这样迭代:

{% for label in form.selected_genders_labels %}
    {{ label }}
{% endfor %}

FTR，我用过:

class XForm(forms.Form):
    GENDER_CHOICES = (
        ('male', 'Men'),
        ('female', 'Women'),
    )

    genders = forms.MultipleChoiceField(choices=GENDER_CHOICES,
        widget=widgets.CheckboxSelectMultiple(),
        initial=[gender[0] for gender in GENDER_CHOICES])

    def selected_genders_labels(self):
        return [label for value, label in self.fields['genders'].choices if value in self['genders'].value()]

你可以制作这样一个模板过滤器:

@register.filter
def selected_labels(form, field):
    return [label for value, label in form.fields[field].choices if value in form[field].value()]

用法:

{% for label in form|selected_labels:"genders" %}
    {{ label }}
{% endfor %}