On 6/02/2019 5:15 pm, 'Amitesh Sahay' via Django users wrote:
I have an existing django views.py where I have some password,
username, and email validation logic applied. However, going forward I
need to apply more advanced password validation. for e.g. password
length limitation, uppercase sensitivity etc. I have a code written
for advanced validation, but I am not able to apply them to my
existing views.py.
You appear to be avoiding Django forms. Conventional wisdom says the
best reason for using forms is to employ the built-in validation like
this ...
from django.contrib.auth.forms import UserCreationForm
class MyUserCreationForm(UserCreationForm):
"""
https://docs.djangoproject.com/en/1.11/topics/auth/customizing/#
custom-users-and-the-built-in-auth-forms
"""
first_name = forms.CharField(
max_length=30,
required=True,
help_text='Required',
)
last_name = forms.CharField(
max_length=30,
required=True,
help_text='Required'
)
username = forms.CharField(
max_length=150,
required=True,
help_text='Required. Letters, digits and @/./+/-/_ only',
)
email = forms.EmailField(
max_length=254,
required=True,
help_text='Required'
)
class Meta(UserCreationForm.Meta):
model = User
fields = [
'first_name',
'last_name',
'username',
'password1',
'password2',
'email',
]
def __init__(self, *args, **kwargs):
super(CommonUserCreationForm, self).__init__(*args, **kwargs)
if 'first_name' in self.fields:
self.fields['first_name'].widget.attrs.update({'autofocus': True})
If you do that you can simplify your register_view() like this ...
from django.contrib.auth import get_user_model
from .forms import CommonUserCreationForm
def register_view(request):
if request.method == 'POST':
form = MyUserCreationForm(request.POST)
# don't like usernames which differ only by character case
#
username = form.data.get('username')
User = get_user_model()
try:
user = User.objects.get(username__iexact=username)
i_username = user.username
if i_username.lower() == username.lower():
form.add_error(
'username',
ValidationError('{0} already
exists'.format(i_username))
)
except User.DoesNotExist:
# DoesNotExist is the expected case
pass
#
if form.is_valid():
form.save()
user = User.objects.get(username__iexact=username)
user.username = form.cleaned_data.get('username')
user.first_name = form.cleaned_data.get('first_name')
user.last_name = form.cleaned_data.get('last_name')
user.email = form.cleaned_data.get('email')
user.save()
raw_password = form.cleaned_data.get('password1')
user = authenticate(username=username, password=raw_password)
auth_login(request, user)
return redirect('myapp:index_view')
else:
form = MyUserCreationForm()
return render(request, 'register.html', {'form': form})
And finally to answer your original question if you do something similar
to the above you can add password validators *to be used in the form* in
your settings module. Like this ...
#
https://docs.djangoproject.com/en/1.11/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME':
'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME':
'django.contrib.auth.password_validation.MinimumLengthValidator',
'OPTIONS': {
'error_message': 'Password too short',
'help_message': 'This password needs to be at least 23
characters',
}
},
{
'NAME':
'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME':
'django.contrib.auth.password_validation.NumericPasswordValidator',
},
{
'NAME':
'pwned_passwords_django.validators.PwnedPasswordsValidator',
'OPTIONS': {
'error_message': 'Known insecure password',
'help_message': 'That is a known insecure password and
cannot be used here.',
}
},
]
Hope that helps
Mike
Below is the code from views.py
|from||||django.shortcuts ||import||||render,||||redirect|
|from||||django.contrib.auth.models ||import||||User|
|from||||django.contrib ||import||||messages|
|from||||.||||import||||validator|
|def||||register(request):|
|if||||request.method ==||||'POST'||:|
|first_name =||||request.POST[||'first_name'||]|
|last_name =||||request.POST[||'last_name'||]|
|email =||||request.POST[||'email'||]|
|username =||||request.POST[||'username'||]|
|password
=||||request.POST[||'password'||,||||validator.||MinimumLengthValidator||]|
|password2 =||||request.POST[||'password2'||]|
|# check if the password match|
|if||||password ==||||password2:|
|if||||User||.objects.filter(username=username).exists():|
|messages.error(request,||||'username already exist'||)|
|return||||redirect(||'register'||)|
|else||:|
|if||||User||.objects.filter(email=email).exists():|
|messages.error(request,||||'Registration Failed - Try different email
address'||)|
|return||||redirect(||'register'||)|
|else||:|
|user
=||||User||.objects.create_user(username=username,||||password=password,||||email=email,|
|first_name=first_name,||||last_name=last_name)|
|user.save()|
|messages.success(request,||||'Registration complete, please proceed
to login'||)|
|return||||redirect(||'register'||)|
|else||:|
|messages.error(request,||||'password dose not match'||)|
|return||||redirect(||'register'||)|
|else||:|
|return||||render(request,||||'ACCOUNTS/register.html'||)|
Below is the code for advanced password validation from validate.py
|import||||re |
|from||||django.core.exceptions ||import||||ValidationError|
|from||||django.utils.translation ||import||||ugettext ||as||||_ |
|class||||MinimumLengthValidator||:|
|def||||__init__(self,||||min_length=||8||):|
|self.min_length =||||min_length|
|def||||validate(self,||||password,||||user=||None||):|
|if||||len(password)||||<||||self.min_length:|
|raise||||ValidationError||(|
|_(||"This password must contain at least %(min_length)d characters."||),|
|code=||'password_too_short'||,|
|params={||'min_length'||:||||self.min_length},|
|)|
|def||||get_help_text(self):|
|return||||_(|
|"Your password must contain at least %(self.min_length)d characters."|
|%||||{||'min_length'||:||||self.min_length}|
|)|
|class||||NumberValidator||(object):|
|def||||validate(self,||||password,||||user=||None||):|
|if||||not||||re.findall(||'\d'||,||||password):|
|raise||||ValidationError||(|
|_(||"The password must contain at least %(min_digits)d digit(s),
0-9."||),|
|code=||'password_no_number'||,|
|)|
|def||||get_help_text(self):|
|return||||_(|
|"Your password must contain at least 1 digit, 0-9."|
|)|
|class||||UppercaseValidator||(object):|
|def||||validate(self,||||password,||||user=||None||):|
|if||||not||||re.findall(||'[A-Z]'||,||||password):|
|raise||||ValidationError||(|
|_(||"The password must contain at least 1 uppercase letter, A-Z."||),|
|code=||'password_no_upper'||,|
|)|
|def||||get_help_text(self):|
|return||||_(|
|"Your password must contain at least 1 uppercase letter, A-Z."|
|)|
I have tried below steps.
|I imported the validator.py ||in||||the views.py,||and||||tried to
call the module.function inside the password field ||as||||below|
|password
=||||request.POST[||'password'||,||||validator.||MinimumLengthValidator||]|
But that doesn't work. If I am right, I can write a mixin class and
call it in my views.py. But I am using function based views. So, I am
not sure if I can use mixin. Please suggest how can we achieve the
desired result.
Regards,
Amitesh Sahay
*91-750 797 8619*
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