为django添加下拉列表

from django.db import models

class MyModel(models.Model):
    my_choices = (
        ('option1', 'Option 1'),
        ('option2', 'Option 2'),
        ('option3', 'Option 3'),
    )
    my_field = models.CharField(max_length=20, choices=my_choices)

from django import forms

class MyForm(forms.Form):
    my_choices = (
        ('option1', 'Option 1'),
        ('option2', 'Option 2'),
        ('option3', 'Option 3'),
    )
    my_field = forms.ChoiceField(choices=my_choices)

from django.shortcuts import render

def my_view(request):
    if request.method == 'POST':
        form = MyForm(request.POST)
        if form.is_valid():
            selected_option = form.cleaned_data['my_field']
            # 处理选中的选项
    else:
        form = MyForm()

    return render(request, 'my_template.html', {'form': form})

<form method="post" action="{% url 'my_view' %}">
    {% csrf_token %}
    {{ form }}
    <input type="submit" value="Submit">
</form>