在django中将自定义html添加到choicefield标签

Question

我现在正在努力满足要求，我想在选择字段标签上添加一个图像，我真的不知道如何做到这一点。我正在使用django表单向导来呈现表单。 这是显示我想要实现的目标的图像：

这就是我现在所拥有的（使内置单选按钮，我知道它可以通过css实现）：

这是forms.py：

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


CHOICES=[('0','Pay by card'), ('1','Invoice')]




class PaymentForm(forms.Form):
    title = 'payment'
    payment_method = forms.ChoiceField(label = _("Payment Options"), choices=CHOICES, widget=forms.RadioSelect(), required = True)

我正在使用向导表单进行渲染：

 {{ wizard.form.payment_method.label_tag }}
                                {{ wizard.form.payment_method|safe }}
                                {{ wizard.form.payment.errors}}

除了自定义小部件之外，任何人都对此有任何建议吗？

Answer 1

在您的模板中执行以下操作：

 {% for choice in wizard.form.payment_method.choices %}
    {{ choice.0 }} {# value #} {{ choice.1 }} {# value #}
    {% if choice.0 == PAYMENT_BY_PAYPAL %}
     ...
    {% endif %}
 {% endfor %}

你也可以写：

  {% for key, value in wizard.form.payment_method.choices %}
    {% if key == PAYMENT_BY_PAYPAL %}
     ...
    {% endif %}
 {% endfor %}

Answer 2

没有小部件：

from django.utils.safestring import mark_safe
CHOICES=[('0', mark_safe('Pay by card <img src="by_card.jpg"/>')),
         ('1', mark_safe('Invoice <img src="no_card.jpg"/>'))
]

信用：setting help_text for each choice in a RadioSelect

Answer 3

1）很快（但我不确定）拨打“按卡付款”并返回您需要的所有<img>...的功能。

2）你可以像@Gahbu说的那样做什么

3）很长[更好，我想，但未经测试:(]： 制作渲染器：

from myapp.my_widgets import CardsRadioFieldRenderer

CARD_CHOICE = '0'

CHOICES=[(CARD_CHOICE,'Pay by card'), ('1','Invoice')]

class PaymentForm(forms.Form):
    title = 'payment'
    payment_method = forms.ChoiceField(label = _("Payment Options"), choices=CHOICES,widget=forms.RadioSelect(renderer=CardsRadioFieldRenderer), required = True)

# myapp/my_widgets.py

class CardRadioInput(RadioInput):
    def __init__(self, name, value, attrs, choice, index):
        self.name, self.value = name, value
        self.attrs = attrs
        choice_value = force_text(choice[0])
        self.choice_value = choice_value
        if choice_value == CARD_CHOICE:
            choice_label = force_text(self.get_html_for_card_choice())
        else:
            choice_label = force_text(choice[1])
        self.choice_label = choice_label
        self.index = index

   def get_html_for_card_choice(self):
        #some logic to get the images tags (<img ...> <img ...>)
        return text


class CardsRadioFieldRenderer(RadioFieldRenderer):
    def __getitem__(self, idx):
        choice = self.choices[idx] # Let the IndexError propogate
        return CardRadioInput(self.name, self.value, self.attrs.copy(), choice, idx)

Answer 4

如果你想从模板中调整它，你需要使用“安全”来告诉Jinja不要逃避它。如下所示

{{ some_object.some_property|safe }}

但是如果你想在定义表单/模型时在你的python代码中使用它，只需使用mark_safe，如下所示。

mark_up = 'this is a <a href="http://www.google.com">link</a>'
choices = list()
choices.append(('some_id', mark_safe(mark_up)))
self.fields['some_field'].choices = choices