views：
#定义编辑功能：
def edit_publisher(request):
#获取要编辑对象的id：
pk = request.GET.get("id")
obj = models.Publisher.objects.filter(pk = pk).first()
#判断如果不是真的话返回要展示的页面：
if not obj:
return HttpResponse("所查询的数据不存在")
if request.method == "POST":
pub_name = request.POST.get("pub_name")
# obj.name = pub_name #内存中修改了属性
# obj.save() #提交保存
if models.Publisher.objects.filter(name=pub_name):
return render(request,"edit_publisher.html",{{"error":"出版社名称已存在"}})
models.Publisher.objects.filter(pk = pk).update(name=pub_name)
#重定向到展示页面：
return redirect("/publisher/")
return render(request,"edit_publisher.html",{"obj":obj})
HTML：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="" method="post">
<p>
出版社名称：<input type="text" name="pub_name" required value="{{ obj.name }}"><span>{{ error }}</span>
</p>
<button>提交</button>
</form>
</body>
</html>