Python | Django | ログインパスワードのバリデーション方法

from django.shortcuts import render, redirect
from django.http import HttpResponse
from user.forms import UserForm, ProfileForm, LoginForm
from django.contrib.auth import authenticate, login, logout
from django.contrib.auth.decorators import login_required
from django.contrib.auth.password_validation import validate_password # 以下追記箇所(6～7行目)
from django.core.exceptions import ValidationError

def user_list(request):
  return render(request, 'user/user_list.html')

def index(request):
  return render(request, 'user/index.html')

def register(request): 
  user_form = UserForm(request.POST or None) 
  profile_form = ProfileForm(request.POST or None, request.FILES or None) 
  if user_form.is_valid() and profile_form.is_valid(): 
    user = user_form.save(commit=False) # 以下編集箇所(19～27行目)
    try:
      validate_password(user_form.cleaned_data.get('password'), user)
    except ValidationError as e:
      user_form.add_error('password', e)
      return render(request, 'user/registration.html', context={
        'user_form':user_form,
        'profile_form':profile_form,
      })
    user.set_password(user.password) 
    user.save() 
    profile = profile_form.save(commit=False) 
    profile.user = user
    profile.save() 
  return render(request, 'user/registration.html', context={ 
    'user_form':user_form, 
    'profile_form':profile_form,
  })

def user_login(request):
  login_form = LoginForm(request.POST or None)
  if login_form.is_valid():
    username = login_form.cleaned_data.get('username')
    password = login_form.cleaned_data.get('password')
    user = authenticate(username=username, password=password)
    if user:
      if user.is_active:
        login(request, user)
        return redirect('user:index')
      else:
        return HttpResponse('アカウントがアクティブでない')
    else:
      return HttpResponse('ユーザーが存在しません')
  return render(request, 'user/login.html', context={
    'login_form': login_form
  })

@login_required
def user_logout(request):
  logout(request)
  return redirect('user:index')

@login_required
def status(request):
  return HttpResponse('ログインしています')

(djangoenv) C:\Users\shiro\Desktop\210517_python development\myviewtest\viewproject
>python manage.py runserver

System check identified no issues (0 silenced). # 以下出力箇所
July 22, 2021 - 15:09:44
Django version 3.2.3, using settings 'viewproject.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.

from django.core.exceptions import ValidationError
import re

class CustomPasswordValidator():
  msg = 'パスワードには，0-9, a-z, 記号(#$%&)を含めてください'

  def __init__(self):
    pass

  def validate(self,password,user=None):
    if all(
      (re.search('[0-9]', password), 
      re.search('[a-z]', password), 
      re.search('[#$%&]', password))):
      return
    raise ValidationError(self.msg)

  def get_help_text(self):
    return self.msg

AUTH_PASSWORD_VALIDATORS = [
  {
    'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
  },
  {
    'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    'OPTIONS': {
      'min_length': 6,
    }
  },
  {
    'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
  },
  {
    'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
  },
  {
    'NAME': 'utils.validations.CustomPasswordValidator' # 追記箇所
  },
  ]