如何实现从视图到表单的所有业务逻辑?

2024-03-29 00:24:03 发布

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我正在开发一个webapp,我想把视图中的逻辑移到表单中。在视图中,我只想保持验证的检查。即:

示例

def myformview(request):
    if request.POST:
        form = MForm(request.POST)
        if form.is_valid():
            form.save()
            redirect("to-some-view")

    render(request, "template_name.html", {
        'form': form
    })

这是我的视图.py

def login_user(request):
    if request.method == 'POST':
        login_form = Login(request.POST)
        if login_form.is_valid():
            email = login_form.cleaned_data['email']
            password = login_form.cleaned_data.get('password')
            user = authenticate(email=email, password=password)
            if user in User.objects.all():
                login(request, user)
                return HttpResponseRedirect(reverse('dashboard'))
            else:
                return render(request, 'todoapp/waiting_2.html')

    return render(request, 'registration/login.html', {'form': Login()})

这是我的表单.py

class Login(forms.Form):
    email = forms.EmailField(max_length=250)
    password = forms.CharField(widget=forms.PasswordInput)

目前一切正常。我只想把视图中的逻辑移到窗体中。就这样。你知道吗

编辑: 我改变了主意表单.py以及视图.py但它仍然不起作用,我得到一个Page Not Found 404错误。你知道吗

这是我的新表单.py

class Login(forms.Form):
    email = forms.EmailField(max_length=250)
    password = forms.CharField(widget=forms.PasswordInput)

    def login_user(self):
        email = self.cleaned_data['email']
        password = self.cleaned_data.get('password')
        user = authenticate(email=email, password=password)
        if user in User.objects.all():
            login(self, user)
        else:
            return render(self, 'todoapp/waiting_2.html')

这是我的新视图.py:

def login_user(request):
    if request.method == 'POST':
        login_form = Login(request.POST)
        if login_form.is_valid():
            return HttpResponseRedirect(reverse('dashboard'))
        else:
            return render(request, 'todoapp/waiting_2.html')
    return render(request, 'registration/login.html', {'form': Login()})

这是我的网址.py

from django.conf.urls import url
from .import views

urlpatterns = [
    url(r'^index/', views.index, name='index'),
    url(r'^register/', views.register, name='register'),
    url(r'^login/', views.login_user, name='login_user'),
    url(r'^dashboard/', views.dashboard, name='dashboard'),
    url(r'^logout_user/', views.logout_user, name='logout_user'),
    url(r'^auth_users/', views.auth_users, name='auth_users'),
    # url(r'^authorize_final', views.authorize_final, name='authorize_final'),
    url(r'^assigntask', views.assigntask, name='assigntask'),
    # url(r'^assign', views.assign, name='assign'),
    url(r'^task_list', views.view_task_list, name='view_task_list'),
    # url(r'^delete_task', views.delete_task, name='delete_task'),
]

我得到的错误是:

AttributeError at /login/

'Login' object has no attribute 'session'

回溯:

File "/home/gblp250/PycharmProjects/practice/venv/local/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/home/gblp250/PycharmProjects/practice/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/home/gblp250/PycharmProjects/practice/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/gblp250/PycharmProjects/assignment/todoapp/views.py" in login_user
  48.             login_form.login_user(request)

File "/home/gblp250/PycharmProjects/assignment/todoapp/forms.py" in login_user
  27.             login(self, request, user)

File "/home/gblp250/PycharmProjects/practice/venv/local/lib/python2.7/site-packages/django/contrib/auth/__init__.py" in login
  126.     if SESSION_KEY in request.session:

Exception Type: AttributeError at /login/
Exception Value: 'Login' object has no attribute 'session'

Tags: nameinpyformurlreturnifemail
1条回答
网友
1楼 · 发布于 2024-03-29 00:24:03

为此,可以重写表单中的is_valid方法(请参阅this link),并将逻辑放在那里,但是,更合适的方法是在视图中使用基于类的视图FormView并对其进行操作。你知道吗

请参考this link作为了解FormView基于类的泛型方法的开始。一旦你了解如何使用它,这将大大简化这个过程。你知道吗

编辑:

总体上看起来不错,但仍然有错误的逻辑实现

class Login(forms.Form):
    email = forms.EmailField(max_length=250)
    password = forms.CharField(widget=forms.PasswordInput)

    def login_user(self, request):
        email = self.cleaned_data['email']
        password = self.cleaned_data.get('password')
        user = authenticate(request, email=email, password=password)
        if user:
            login(request, user) // self should have been replaced by request
        else:
            return HttpResponseRedirect(reverse('view_task_list'))//You can redirect to any url

这是我的新衣服视图.py::

def login_user(request):
    if request.method == 'POST':
        login_form = Login(request.POST)
        if login_form.is_valid():
            login_form.login_user(request) //just call the method created in the form
    else:
        login_form = Login() //this is for GET REQUEST
    return render(request, 'registration/login.html', {'form': login_form}) //you should return instance of the form

这是我的网址.py地址:

from django.conf.urls import url
from .import views

urlpatterns = [
    url(r'^index/', views.index, name='index'),
    url(r'^register/', views.register, name='register'),
    url(r'^login/', views.login_user, name='login_user'),
    url(r'^dashboard/', views.dashboard, name='dashboard'),
    url(r'^logout_user/', views.logout_user, name='logout_user'),
    url(r'^auth_users/', views.auth_users, name='auth_users'),
    # url(r'^authorize_final', views.authorize_final, name='authorize_final'),
    url(r'^assigntask', views.assigntask, name='assigntask'),
    # url(r'^assign', views.assign, name='assign'),
    url(r'^task_list', views.view_task_list, name='view_task_list'),
    # url(r'^delete_task', views.delete_task, name='delete_task'),
]

此外,您必须在settings.py中设置登录和注销重定向URL,因为您使用的是g default login()方法

LOGIN_REDIRECT_URL = '/'
LOGOUT_REDIRECT_URL = '/' //change as you wish

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