如果我们使用django通用视图,如何发送成功消息

Question

我是django的新手(1.2.4).我用通用视图创建了一些crud.但是,当使用django的消息传递框架创建学生时,如何显示"学生成功添加"之类的内容？

Answer 1

从Django 1.6+开始,使用任何基于类的通用视图,您可以依赖successMessageMixin.它就像将mixin添加到类定义中并将success_message属性设置为您想要的任何内容一样简单.

正如Olivier Verdier所提到的,请记得在主模板中显示消息!

来自文档的一个简单示例:

from django.contrib.messages.views import SuccessMessageMixin
from django.views.generic.edit import CreateView
from myapp.models import Author

class AuthorCreate(SuccessMessageMixin, CreateView):
    model = Author
    success_url = '/success/'
    success_message = "%(name)s was created successfully"

一个更复杂的例子:

from django.contrib.messages.views import SuccessMessageMixin
from django.views.generic.edit import CreateView
from myapp.models import ComplicatedModel

class ComplicatedCreate(SuccessMessageMixin, CreateView):
    model = ComplicatedModel
    success_url = '/success/'
    success_message = "%(calculated_field)s was created successfully"

    def get_success_message(self, cleaned_data):
        #  cleaned_data is the cleaned data from the form which is used for string formatting
        return self.success_message % dict(cleaned_data,
                                           calculated_field=self.object.calculated_field)

Answer 2

据我所知，使用传统的通用视图没有一种简单的方法可以做到这一点。我一直觉得通用视图的文档非常缺乏，所以从未使用过它们。

理论上，您可以通过假设重定向意味着成功提交来使用装饰器。

所以你可以写这样的东西（这些代码都没有经过测试）：

网址.py：

try:
    from functools import wraps
except ImportError:
    from django.utils.functional import wraps
from django.http import HttpRedirectResponse
from django.contrib import messages
from django.views.generic import * 

def add_message(success_message=None):
    def decorator(func):
        def inner(request, *args, **kwargs):
            resp = func(request, *args, **kwargs)
            if isinstance(resp, HttpRedirectResponse):
                messages.success(request, message)
            return resp
        return wraps(func)(inner)
    return decorator



student_info_edit = {
  'template_name': 'myapp/student/form.html',
  'template_object_name': 'student',
  'form_class':  studentForm,
}

student_info_new = {
  'template_name': 'myapp/student/form.html',
  'form_class':  studentForm,
  'post_save_redirect': '/myapp/students/',
}

urlpatterns += patterns('',
  url(r'^students/$', list_detail.object_list, { 'queryset': Student.objects.all() }, name="students"),
  url(r'^students/(?P<object_id>\d+)/$', add_message("Student record updated successfully")(create_update.update_object), student_info_edit, name="student_detail"),
  url(r'^students/new$', add_message("The student was added successfully.")(create_update.create_object), student_info_new, name="student_new"),
)

综上所述，Django 1.3 引入了基于类的通用视图，因此如果您有兴趣转向 Django 1.3，您应该研究一下这些内容。他们可能允许更多定制，但不确定。

从长远来看，我很少看到使用通用视图的福利形式，而对于添加/更新之类的事情来说，这种情况会加倍。