210820 장고 22강 Login / Logout 구현

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22강 Login / Logout 구현

로그인 후 어카운트 프로필로 간다. 기본적으로 설정되는곳 
메카니즘 login view, logout view -> redirect
next -> login_redirect_url->default(profile) 
으로 간다. 순서이다. 그렇다.

로그인할때마다 이제 .. login이렇게 입력할텐데 
창을 만들어줍니다.

앵커태그를이용하여 한페지이내에 링크를 만들어준다.
span 태그란 ?
 글씨가 가로로 펼쳐짐
 줄바꿈은 옆으로 펼쳐짐 
  <span>태그는 inline element (인라인 엘리먼트)라 자신의 content 만큼 공간을 차지한다.
 
div태그란? 
글씨를 한 박스안에 묶음
줄바꿈은 아래로 펼쳐짐
코드의 행 전체를 차지한다.
만약 코드가 1,000줄이 넘고 코드도 다른 코드 30개들이 있는데 여기에 모두 동일한 효과를 적용시켜야 된다고 하면,
 코드 하나하나에 효과를 넣는 게 아니라 <div> 태그로 묶어 나중에 css로 
 30여 개의 코드에 동일한 효과를 적용시킬 때 사용한다.
 
 setting.py
 """
Django settings for pragmatic project.

Generated by 'django-admin startproject' using Django 3.2.6.

For more information on this file, see
https://docs.djangoproject.com/en/3.2/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/3.2/ref/settings/
"""

from pathlib import Path

import os, environ

from django.urls import reverse_lazy

env = environ.Env(
    # set casting, default value
    DEBUG=(bool, False)
)

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent

# reading .env file
environ.Env.read_env(
    env_file= os.path.join(BASE_DIR, '.env')
)

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/3.2/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = env('SECRET_KEY')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

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

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

ROOT_URLCONF = 'pragmatic.urls'

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',
            ],
        },
    },
]

WSGI_APPLICATION = 'pragmatic.wsgi.application'


# Database
# https://docs.djangoproject.com/en/3.2/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}


# Password validation
# https://docs.djangoproject.com/en/3.2/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/3.2/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.2/howto/static-files/

STATIC_URL = '/static/'

STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')

STATICFILES_DIRS = [
    BASE_DIR / "static",
    '/var/www/static/',
]


# Default primary key field type
# https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

LOGIN_REDIRECT_URL = reverse_lazy('accountapp:hello_world')
LOGOUT_REDIRECT_URL = reverse_lazy('accountapp:login')
로그인에서 접속했을 때 헬로월드를 보여주고 로그아웃을 했을 때 로그인창을 보여준다.

login.html

{% extends 'base.html' %}

{% block content %}
    <div style="text-align: center">
        <div>
            <h4>Login</h4>
        </div>
        <div>
            <form action="" method="post">
                {% csrf_token %}
                {{ form }}
                <input type="submit" class="btn btn-primary">
            </form>
        </div>
    </div>
{% endblock %}

urls.py
from django.contrib.auth.views import LoginView, LogoutView
from django.urls import path

from accountapp.views import hello_world, AccountCreateView

app_name = 'accountapp'
#"127.0.0.1:8000/account"
#왜 어카운트앱안에 있는데 또 다시 만드냐
#저위에 라우트를 매번 쓸수 없기에 기능을 사용해서 헬로월드라는 곳으로 바로가라는 함수를
#사용할 수 있다.

urlpatterns = [
    path('hello_world/', hello_world, name='hello_world'),
    #롸우터의 이름
    path('login/', LoginView.as_view(template_name='accountapp/login.html'), name='login'),
    path('logout/', LogoutView.as_view(), name='logout'),
    path('create/', AccountCreateView.as_view(), name='create'),
]

views.py
from django.contrib.auth.forms import UserCreationForm
from django.contrib.auth.models import User
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render

# Create your views here.

#view 단의 완성
from django.urls import reverse, reverse_lazy
from django.views.generic import CreateView

from accountapp.models import HelloWorld


def hello_world(request):

    if request.method == "POST":
        # 포스트가 완료한이후에 겟으로 되돌아가서 남아있는 글들을 지울 수 있게한다.
        temp = request.POST.get("hello_world_input")

        new_hello_world = HelloWorld()
        new_hello_world.text = temp
        new_hello_world.save()

        hello_world_list = HelloWorld.objects.all() #헬로월드에 모든 데이터를 다 긁어온다.
        return HttpResponseRedirect(reverse('accountapp:hello_world'))
    # 포스트가 완료한이후에 겟으로 되돌아가서 남아있는 글들을 지울 수 있게한다. redirect
    # URL에서 ACCOUNT를 가져온다. 해당 경로를 만들어줄 함수를 쓴다
    else:
        hello_world_list = HelloWorld.objects.all()
        return render(request, 'accountapp/hello_world.html',
                      context={'hello_world_list': hello_world_list})
#view는 만들었고 이제 route해줘야한다.
#특정 주소를 만들어 주는 작업이 필요하다.

class AccountCreateView(CreateView):
    model = User
    form_class = UserCreationForm
    success_url = reverse_lazy('accountapp:hello_world') #여기서 reverse를 사용불가 클래스형
    #reverse는 함수형에서 사용한다.
    template_name = 'accountapp/create.html'

header.html

    <div class="pragmatic_header">
        <div>
            <h1 class="pragmatic_logo">Pragmatic</h1>
        </div>
        <div>
            <span>nav1</span>
            <span>nav2</span>
            <span>nav3</span>
            {% if not user.is_authenticated %}
            <a href="{% url 'accountapp:login'%}?next={{ request.path }}">
                <span>login</span>
            </a>
            {% else %}
            <a href="{% url 'accountapp:logout'%}?next={{ request.path }}">
                <span>logout</span>
            </a>
            {% endif %}
        </div>
    </div>