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How do I iterate over the options of a SelectField in a template?

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长情又很酷
长情又很酷 2020-12-23 20:47

I have a select field in the form and now I need to iterate over options in this field.

{{ form.myselect }} gives me this:
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  • 离开以前
    2020-12-23 21:16

    With radio buttons in your template use.

        <table>
        {% for x,y in form.fields.Customer.choices %}
        <tr>
            <td><input id="id_Customer_{{x}}" {% if form.fields.Customer.value == x %}checked="checked"{% endif %} name="Customer" type="radio" value="{{x}}" /></td>
            <td>{{ y }}</td>
        </tr>
        {% endfor %}
    </table>
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  • 傲寒
    2020-12-23 21:21

    I've been struggling with this problem today and found the solution. Yes, you can iterate over options of the select tag directly in template. Here's how to do it in template:

    <select id="id_customer" name="customer">
{% for x, y in form.fields.customer.choices %}
    <option value="{{ x }}"{% if form.fields.customer.value == x %} selected{% endif %}>{{ y }}</option>
{% endfor %}
</select>

    In this case I have a customer field in the form which has choices set up as follows:

    class SomeForm(forms.Form):
    customer = forms.ChoiceField(label=u'Customer')

    def __init__(self, *args, **kwargs):
        super(SomeForm, self).__init__(*args, **kwargs)
        self.fields['customer'].choices = [(e.id, e.customer) for e in Customers.objects.all()]

    Hope this helps

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  • 长情又很酷
    2020-12-23 21:27

    Got it to work with:

        <select name="myselect" class="i-can-add-my-own-attrs-now" id="id_myselect">
        {% for id, name in form.myselect.field.choices %}
        <option value="{{ id }}">{{ name }}</option>
        {% endfor %}
    </select>

    BUT REALLY, a better way to do this is with django-widget-tweaks:

        {% load widget_tweaks %}
    {{ form.myselect|add_class:"i-can-haz-custom-classes-easily" }}

    Doing it with django-widget-tweaks will also set the default 'selected="selected"' for you, which is super nice!

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  • 天涯浪人
    2020-12-23 21:28

    This is a cleaner solution, you can set the attributes using a custom Widget. This way you don't have to render the field manually:

    class CustomSelectWidget(forms.Select):
    def create_option(self, name, value, *args, **kwargs):
        option = super().create_option(name, value, *args, **kwargs)
        if value:
            instance = self.choices.queryset.get(pk=value)  # get instance
            option['attrs']['custom_attr'] = instance.field_name  # set option attribute
        return option

class SomeForm(forms.ModelForm):
    some_field = forms.ModelChoiceField(
        queryset=SomeModel.objects.all(),
        widget=CustomSelectWidget
    )
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