Django:使用按钮更新模型字段

# models.py
from django.db import models

class MyModel(models.Model):
    field = models.CharField(max_length=100)

# views.py
from django.shortcuts import render
from .models import MyModel

def update_field(request):
    if request.method == 'POST':
        # 获取模型实例
        instance = MyModel.objects.first()
        
        # 更新模型字段
        instance.field = request.POST.get('new_value')
        instance.save()
        
    return render(request, 'update_field.html')

# update_field.html
<form method="POST" action="{% url 'update_field' %}">
    {% csrf_token %}
    <input type="text" name="new_value">
    <button type="submit">更新字段</button>
</form>

# urls.py
from django.urls import path
from .views import update_field

urlpatterns = [
    path('update_field/', update_field, name='update_field'),
]