python - Django Forms 默认选择动态循环前面的值

Question

尝试在已就位且有效的动态选择循环前面添加默认选择('', 'Select Type')。

form.py

card_choices = [(c.id, c.name) for c in Payment.objects.filter(id=id)]
payment = forms.ChoiceField(required=True, label='Type', choices=card_choices)

template.html

{{ form. payment }}

将生成:

<option value="1" selected="selected">VISA</option>
<option value="2">Amex</option>
<option value="3">Mastercard</option>
<option value="4">Discover</option>

寻找:

<option value="" selected="selected">Select Type</option>
<option value="1">VISA</option>
<option value="2">Amex</option>
<option value="3">Mastercard</option>
<option value="4">Discover</option>

Answer 1

您可以将此值放在选择元组的第一位:

payment = forms.ChoiceField(required=True, label='Type',
                            choices=[(None, 'Select Type')]+card_choices)