2024年5月1日 星期三

在pythonanywhere設計Django網站的登入功能

延續文章：在pythonanywhere設計Django網站的卡片(Card)功能(新增For Template)

1.修改mysite/urls.py

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"""mysite URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/4.0/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from myapp.views import index, vegetable, fruit, post1, post2, edit, login, logout, register

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', index),
    path('index/', index),
    path('vegetable/', vegetable),
    path('fruit/', fruit),
    path('post1/', post1),
    path('post2/', post2),
    path('edit/<int:id>/',edit),
    path('edit/<int:id>/<str:mode>', edit), # 由 edit.html 按 送出 鈕
    path('login/', login),
    path('logout/', logout),
    path('register/', register),
]

2.修改myapp/views.py

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from django.shortcuts import render, redirect
from myapp.models import vegetableDB
from myapp.forms import PostForm
from django.contrib.auth import authenticate
from django.contrib import auth
from django.contrib.auth.models import User
from django.http import HttpResponse

# Create your views here.
def index(request):
    slide1 = {'image':'fruits01.jpg', 'active':'active', 'interval':'10000', 'title':'水果01', 'subtitle':'好水果在雲林'}
    slide2 = {'image':'fruits02.jpg', 'active':'', 'interval':'2000', 'title':'水果02', 'subtitle':'好水果在雲林'}
    slide3 = {'image':'fruits03.jpg', 'active':'', 'interval':'3000', 'title':'水果03', 'subtitle':'好水果在雲林'}
    slides = [slide1, slide2, slide3]
    if 'login' in request.session:
        login = request.session['login']
    else:
        login = 0
    return render(request, 'index.html', locals())

def vegetable(request):
    vegetables = vegetableDB.objects.all().order_by('id')
    return render(request, 'vegetable.html', locals())

def fruit(request):
    return render(request, 'fruit.html', locals())

def post1(request):
	if request.method == "POST":
		image1 = request.POST['image']
		title1 =  request.POST['title']
		subtitle1 =  request.POST['subtitle']
		#新增一筆記錄
		unit = vegetableDB.objects.create(image=image1, title=title1, subtitle=subtitle1)
		unit.save()
		return redirect('/')
	else:
		message = '請輸入資料(資料不作驗證)'
	return render(request, "post1.html", locals())

def post2(request):  #新增資料，資料必須通過驗證
	if request.method == "POST":  #如果是以POST方式才處理
		postform = PostForm(request.POST)  #建立forms物件
		if postform.is_valid():			#通過forms驗證
			image1 = postform.cleaned_data['image'] #取得表單輸入資料
			title1 =  postform.cleaned_data['title']
			subtitle1 =  postform.cleaned_data['subtitle']
			#新增一筆記錄
			unit = vegetableDB.objects.create(image=image1, title=title1, subtitle=subtitle1)
			unit.save()
			return redirect('/')
		else:
			message = '驗證碼錯誤！'
	else:
		message = 'image, title, subtitle'
		postform = PostForm()
	return render(request, "post2.html", locals())

def edit(request,id=None,mode=None):
	if mode == "edit":  # 由 edit.html 按 submit
		unit = vegetableDB.objects.get(id=id)  #取得要修改的資料記錄
		unit.image=request.GET['image']
		unit.title=request.GET['title']
		unit.subtitle=request.GET['subtitle']
		unit.save()  #寫入資料庫
		return redirect('/vegetable/')
	else: # 由網址列
		try:
			unit = vegetableDB.objects.get(id=id)  #取得要修改的資料記錄
		except:
			message = "此 id不存在！"
		return render(request, "edit.html", locals())

def login(request):
	if request.method == 'POST':
		name = request.POST['username']
		password = request.POST['password']
		user = authenticate(username=name, password=password)
		if user is not None:
			if user.is_active:
				auth.login(request,user)
				message = '登入成功！'
				request.session['login']=1
				return redirect('/index/')
			else:
				message = '帳號尚未啟用！'
				request.session['login']=0
		else:
			message = '登入失敗！'
			request.session['login']=0
			return redirect('/index/')
	return render(request, "login.html", locals())

def logout(request):
	auth.logout(request)
	request.session['lgoin']=0
	return redirect('/index/')

def register(request):
	if request.method == 'POST':
		name = request.POST['username']
		first_name = request.POST['first_name']
		last_name = request.POST['last_name']
		password = request.POST['password']
		email = request.POST['email']
		user = authenticate(username=name, password=password)
		try:
		    user=User.objects.get(username=name)
		except:
		    user=None
		if user!=None:
		    message = user.username + " 帳號已建立!<a href='/index/'>Home</a>"
		    return HttpResponse(message)
		else:	# 建立 test 帳號
		    user=User.objects.create_user(name,email,password)
		    user.first_name=first_name
		    user.last_name=last_name
		    user.is_staff=True
		    user.save()
		    return redirect('/index/')
	return render(request, "register.html", locals())

3.修改templates/index.html

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<!DOCTYPE html>
<html>
<head>
  {% load bootstrap5 %}
  {% bootstrap_css %}
  {% bootstrap_javascript %}
  {% load static %}
</head>
<body>
<div id="carouselExampleInterval" class="carousel slide" data-bs-ride="carousel">
  <div class="carousel-inner">
    {% for item in slides %}:
        <div class="carousel-item {{ item.active }}" data-bs-interval= {{ item.interval }}>
            <img src="{% static 'images/' %}{{ item.image }}" class="d-block w-100" alt="...">
            <div class="carousel-caption d-none d-md-block">
                <h5 style="color:white;">{{ item.title }}</h5>
                <p style="color:white;">{{ item.subtitle }}</p>
            </div>
        </div>
    {% endfor %}
  </div>
  <button class="carousel-control-prev" type="button" data-bs-target="#carouselExampleInterval" data-bs-slide="prev">
    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
    <span class="visually-hidden">Previous</span>
  </button>
  <button class="carousel-control-next" type="button" data-bs-target="#carouselExampleInterval" data-bs-slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="visually-hidden">Next</span>
  </button>
</div>

<div class="container">
  <ul class="nav bg-info">
    <li class="nav-item">
      <a class="nav-link link-light" href="/">首頁</a>
    </li>
    <li class="nav-item">
      <a class="nav-link link-light" href="/vegetable/">蔬菜</a>
    </li>
    <li class="nav-item">
      <a class="nav-link link-light" href="/fruit/">水果</a>
    </li>
    <li class="nav-item">
      {% if login  == 1 %}
        <a class="nav-link link-light" href="/logout/">登出</a>
      {% else %}
        <a class="nav-link link-light" href="/login/">登人</a>
      {% endif %}
    </li>
  </ul>
<h1>虎科小農超市</h1>

<p>虎科大是一所很重視永續發展暨社會責任的大學</p>
  {% block content %}
  {% endblock %}
</div>

</body>
</html>

4.新增 login.html

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<html>
<form action="." method="POST" name="form1">
    {% csrf_token %}
    <div>帳號：<input type="text" name="username" id="username"/></div>
    <div>密碼：<input type="password" name="password" id="password"/></div>
    <div>
    <input type="submit" name="button" id="button" value="登入" />
    </div>
    <span style="color:red">{{message}}</span>
</form>
<h2><a href='/register/'>註冊</a></h2>
</html>

5.新增register.html

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<html>
<form action="." method="POST" name="form1">
    {% csrf_token %}
    <div>帳號：<input type="text" name="username" id="username"/></div>
    <div>密碼：<input type="password" name="password" id="password"/></div>
    <div>姓氏：<input type="text" name="last_name" id="last_name"/></div>
    <div>名字：<input type="text" name="first_name" id="first_name"/></div>
    <div>Email：<input type="text" name="email" id="email"/></div>
    <div>
    <input type="submit" name="button" id="button" value="註冊" />
    </div>
    <span style="color:red">{{message}}</span>
</form>
</html>


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