Django - 如何使用 UpdateView CBV 发送成功消息

Question

(首先很抱歉我的英语不好)
当用户保存更改时，我试图在 UpdateView 中显示一条消息!

这是我的看法

class NeedUpdateView(UpdateView):
    model = Need
    template_name = 'purchases/needs_update_form.html'
    pk_url_kwarg = 'need_id'
    success_message = 'List successfully saved!!!!'
    fields = [
        'detail',
    ]

当您保存应用程序时加载相同的模板!但我喜欢在保存对象时显示 bootstrap 警报!

这是模板中显示消息的代码

{% if messages %}
<div class="alert alert-success">
    {% for m in messages %}
    <li{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ m }}</li>
    {% endfor %}
</div>
{% endif %}

在设置中我添加了这个

MESSAGE_STORAGE = 'django.contrib.messages.storage.session.SessionStorage'

但是我无法显示消息!对象中的更改保存罚款只需要显示消息!

编辑:我在这里显示我的设置以表明我遵循文档中的所有步骤

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

DJANGO_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, "templates")],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'django.template.context_processors.i18n',
                'apps.cart.context_processors.cart',
            ],
        },
    },
]

Answer 1

致 enable the messages in class based views ，您需要使用 SuccessMessageMixin .

from django.contrib.messages.views import SuccessMessageMixin

class NeedUpdateView(SuccessMessageMixin, UpdateView):
    ...
    success_message = 'List successfully saved!!!!'