from django.db import models

class ExampleModel(models.Model):
    field1 = models.CharField(max_length=100)
    field2 = models.IntegerField()

from django import forms
from .models import ExampleModel

class ExampleForm(forms.ModelForm):
    class Meta:
        model = ExampleModel
        fields = ['field1']

from django.shortcuts import render, get_object_or_404
from .forms import ExampleForm

def example_view(request, id):
    example = get_object_or_404(ExampleModel, id=id)

    if request.method == 'POST':
        form = ExampleForm(request.POST, instance=example)
        if form.is_valid():
            form.save()
            # 数据保存成功，可以进行相应的操作
    else:
        form = ExampleForm(instance=example)

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

from django.urls import path
from .views import example_view

urlpatterns = [
    path('example/<int:id>/', example_view, name='example'),
]