模型层(单表练习)
图书管理系统：
实现功能：book单表的增删改查
查询操作练习：
1 查询人民出版社出版过的价格大于200的书籍
2 查询2017年8月出版的所有以py开头的书籍名称
3 查询价格为50,100或者150的所有书籍名称及其出版社名
4 查询价格在100到200之间的所有书籍名称及其价格
5 查询所有人民出版社出版的书籍的价格（从高到低排序，去重）
效果：
目录结构：
06 django模型层\book\book\settings.py
1 """
2 Django settings for book project.
3
4 Generated by 'django-admin startproject' using Django 2.2.3.
5
6 For more information on this file, see
7 https://docs.djangoproject.com/en/2.2/topics/settings/
8
9 For the full list of settings and their values, see
10 https://docs.djangoproject.com/en/2.2/ref/settings/
11 """
12
13 import os
14
15 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
16 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
17
18
19 # Quick-start development settings - unsuitable for production
20 # See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
21
22 # SECURITY WARNING: keep the secret key used in production secret!
23 SECRET_KEY = 'cex-c#ja^@=p_dp#ak0-@=^ws!_-f6g#*52jb5!3%xhe4!dc^*'
24
25 # SECURITY WARNING: don't run with debug turned on in production!
26 DEBUG = True
27
28 ALLOWED_HOSTS = []
29
30
31 # Application definition
32
33 INSTALLED_APPS = [
34 'django.contrib.admin',
35 'django.contrib.auth',
36 'django.contrib.contenttypes',
37 'django.contrib.sessions',
38 'django.contrib.messages',
39 'django.contrib.staticfiles',
40 # 'book_app01.apps.BookApp01Config',
41 'book_app01',
42 ]
43
44 MIDDLEWARE = [
45 'django.middleware.security.SecurityMiddleware',
46 'django.contrib.sessions.middleware.SessionMiddleware',
47 'django.middleware.common.CommonMiddleware',
48 'django.middleware.csrf.CsrfViewMiddleware',
49 'django.contrib.auth.middleware.AuthenticationMiddleware',
50 'django.contrib.messages.middleware.MessageMiddleware',
51 'django.middleware.clickjacking.XFrameOptionsMiddleware',
52 ]
53
54 ROOT_URLCONF = 'book.urls'
55
56 TEMPLATES = [
57 {
58 'BACKEND': 'django.template.backends.django.DjangoTemplates',
59 'DIRS': [os.path.join(BASE_DIR, 'templates')],
60 'APP_DIRS': True,
61 'OPTIONS': {
62 'context_processors': [
63 'django.template.context_processors.debug',
64 'django.template.context_processors.request',
65 'django.contrib.auth.context_processors.auth',
66 'django.contrib.messages.context_processors.messages',
67 ],
68 },
69 },
70 ]
71
72 WSGI_APPLICATION = 'book.wsgi.application'
73
74
75 # Database
76 # https://docs.djangoproject.com/en/2.2/ref/settings/#databases
77
78 # DATABASES = {
79 # 'default': {
80 # 'ENGINE': 'django.db.backends.sqlite3',
81 # 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
82 # }
83 # }
84
85
86 # Password validation
87 # https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
88
89 AUTH_PASSWORD_VALIDATORS = [
90 {
91 'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
92 },
93 {
94 'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
95 },
96 {
97 'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
98 },
99 {
100 'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
101 },
102 ]
103
104
105 # Internationalization
106 # https://docs.djangoproject.com/en/2.2/topics/i18n/
107
108 LANGUAGE_CODE = 'en-us'
109
110 TIME_ZONE = 'UTC'
111
112 USE_I18N = True
113
114 USE_L10N = True
115
116 USE_TZ = True
117
118
119 # Static files (CSS, JavaScript, Images)
120 # https://docs.djangoproject.com/en/2.2/howto/static-files/
121
122 STATIC_URL = '/static/'
123
124 STATICFILES_DIRS = [
125 os.path.join(BASE_DIR, 'statics')
126 ]
127 DATABASES = {
128 'default': {
129 'ENGINE': 'django.db.backends.mysql',
130 'NAME':'orm',# 要连接的数据库，连接前需要创建好
131 'USER':'root',# 连接数据库的用户名
132 'PASSWORD':'root',# 连接数据库的密码
133 'HOST':'127.0.0.1',# 连接主机，默认本级
134 'PORT':3306 # 端口 默认3306
135 }
136 }
137
138 LOGGING = {
139 'version': 1,
140 'disable_existing_loggers': False,
141 'handlers': {
142 'console':{
143 'level':'DEBUG',
144 'class':'logging.StreamHandler',
145 },
146 },
147 'loggers': {
148 'django.db.backends': {
149 'handlers': ['console'],
150 'propagate': True,
151 'level':'DEBUG',
152 },
153 }
154 }
06 django模型层\book\book\__init__.py
import pymysql
pymysql.install_as_MySQLdb()
06 django模型层\book\book\urls.py
from django.contrib import admin
from django.urls import path,re_path,include
urlpatterns = [
path('admin/', admin.site.urls),
re_path('^app01/', include(('book_app01.urls','book_app01'))),
]
06 django模型层\book\book_app01\models.py
from django.db import models
# Create your models here.
class Book(models.Model):
id = models.AutoField(primary_key=True)
title = models.CharField(max_length=32,unique=True)
state = models.BooleanField()
pub_date = models.DateField()
price=models.DecimalField(max_digits=8,decimal_places=2)
publish=models.CharField(max_length=32)
def __str__(self):
return self.title
06 django模型层\book\book_app01\urls.py
from django.urls import path,re_path,include
from book_app01 import views
urlpatterns = [
path('book/', views.book),
path('book/add', views.add_book),
re_path(r'book/(\d+)/update', views.update_book),
re_path(r'book/(\d+)/delete', views.delete_book),
]
06 django模型层\book\book_app01\views.py
1 from django.shortcuts import render,redirect
2 from book_app01.models import Book
3
4 # Create your views here.
5
6
7 def book(request):
8 method = request.method
9 req = request.POST if request.POST else request.GET
10 try:
11 title = req.get('title') if req.get('title') else ''
12 except:
13 title = ''
14 book_list = Book.objects.filter(title__contains=title)
15 '''
16 # 1 查询人民出版社出版过的价格大于200的书籍
17 res = Book.objects.filter(publish="人民出版社",price__gt=200)
18 # 2 查询2017年8月出版的所有以py开头的书籍名称
19 res = Book.objects.filter(pub_date__contains="2017-08",title__startswith='py').values('title')
20 # 3 查询价格为50,100或者150的所有书籍名称及其出版社名
21 res = Book.objects.filter(price__in=[50,100,150]).values('title','publish')
22 # 4 查询价格在100到200之间的所有书籍名称及其价格
23 res = Book.objects.filter(price__range=[100,200]).values('title','price')
24 # 5 查询所有人民出版社出版的书籍的价格（从高到低排序，去重）
25 res = Book.objects.filter(publish="人民出版社").values('price').distinct().order_by('-price')
26 print('res----------->',res)
27 '''
28 return render(request, 'book.html',locals())
29
30
31 def add_book(request):
32 method = request.method
33 if method == 'POST':
34 req = request.POST
35 title = req['title'].strip()
36 price = req['price'].strip()
37 date = req['date'].strip()
38 publish = req['publish'].strip()
39 if title and price and date and publish:
40 selct_res = Book.objects.filter(title=title)
41 if not selct_res:
42 Book.objects.create(title=title,price=price,pub_date=date,publish=publish)
43 return redirect('/app01/book')
44 opt_res = '书籍【%s】已存在,请修改后提交！'%title
45 else:
46 opt_res = '输入不能为空,请修改后提交！'
47 return render(request, 'addbook.html', locals())
48
49
50 def update_book(request, num):
51 select_res = Book.objects.filter(id=num)
52 if select_res:
53 method = request.method
54 book_obj = select_res[0]
55 if method == 'POST':
56 req = request.POST
57 title = req['title'].strip()
58 price = req['price'].strip()
59 date = req['date'].strip()
60 publish = req['publish'].strip()
61 if title and price and date and publish:
62 selct_res = Book.objects.exclude(id=num).filter(title=title)
63 if not selct_res:
64 Book.objects.filter(id=num).update(title=title, price=price, pub_date=date, publish=publish)
65 return redirect('/app01/book')
66 opt_res = '书籍【%s】已存在,请修改后提交！' % selct_res[0].title
67 else:
68 opt_res = '输入不能为空,请修改后提交！'
69 return render(request, 'updatebook.html', locals())
70 return redirect('/app01/book')
71
72 def delete_book(request, num=None):
73 select_res = Book.objects.filter(id=num)
74 if select_res:
75 Book.objects.filter(id=num).delete()
76 return redirect('/app01/book')
06 django模型层\book\templates\advertise.html
1 <div class="action">
2 <div class="panel panel-danger">
3 <div class="panel-heading">2019进击的菜鸟</div>
4 <div class="panel-body">
5 web框架开发
6 </div>
7 <div class="panel-body">
8 crm&爬虫
9 </div>
10 <div class="panel-body">
11 算法&设计模式&企业应用
12 </div>
13 <div class="panel-body">
14 vue项目
15 </div>
16 <div class="panel-body">
17 复习python&自动化&性能
18 </div>
19 </div>
20 <div class="panel panel-warning">
21 <div class="panel-heading">2020进击的小鸟</div>
22 <div class="panel-body">
23 fighting!
24 </div>
25 </div>
26 <div class="panel panel-success">
27 <div class="panel-heading">2021进击的大鸟</div>
28 <div class="panel-body">
29 go on !
30 </div>
31 </div>
32 </div>
06 django模型层\book\templates\base.html
1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 {% block title %}
6 <title>base——title</title>
7 {% endblock title %}
8 <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"
9 integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
10 {% block style %}
11 <style type="text/css">
12 *{
13 padding: 0;
14 margin:0;
15 }
16 .header{
17 width:100%;
18 height: 50px;
19 background-color: #369;
20 }
21 body{
22 background:#FFF url('/static/base.jpg') repeat-x 0;
23 background-attachment: fixed;
24 }
25 </style>
26 {% endblock style %}
27
28 </head>
29 <body>
30
31 <div class="header"></div>
32
33 <div class="container">
34 <div class="row">
35 <div class="col-md-3">
36 {% include 'advertise.html' %}
37 </div>
38 <div class="col-md-9">
39 {% block content%}
40 <h3>base_content</h3>
41 {% endblock %}
42 </div>
43 </div>
44 </div>
45
46 </body>
47 {% block js %}
48 <script type="text/javascript" src="/static/jquery-3.3.1.js"></script>
49 {% endblock js %}
50 </html>
06 django模型层\book\templates\book.html
1 {% extends 'base.html' %}
2
3 {% block style %}
4 {{ block.super }}
5 <style>
6 .mybook {
7 margin-top: 40px;
8 }
9
10 .btn {
11 margin-top: 5px;
12 }
13 .other{
14 margin-top: 5px;
15 }
16 .filter{
17 margin-bottom: 30px;
18 }
19 .empty{
20 text-align: center;
21 color: #D0D0D0;
22 }
23 </style>
24 {% endblock style %}
25
26 {% block title %}
27 <title>book</title>
28 {% endblock title %}
29
30 {% block content %}
31 <h3>查看书籍</h3>
32
33 <div class="container mybook">
34 <div class="row">
35 <div class="col-md-6">
36 <form class="form-inline filter" action="">
37 <div class="form-group">
38 <div class="form-group other">
39 <label for="">书籍名称</label>
40 <input type="text" class="form-control" placeholder="python" name="title">
41 </div>
42 </div>
43 <button type="submit" class="btn btn-primary">查询</button>
44 </form>
45 <a href="/app01/book/add" class="btn btn-primary other">添加书籍</a>
46 <table class="table table-striped table-bordered">
47 <thead>
48 <tr>
49 <th>书籍名称</th>
50 <th>价格</th>
51 <th>出版日期</th>
52 <th>出版社</th>
53 <th>删除操作</th>
54 <th>编辑操作</th>
55 </tr>
56 </thead>
57 <tbody>
58 {% for book in book_list %}
59 <tr>
60 <td>{{ book.title }}</td>
61 <td>{{ book.price }}</td>
62 <td>{{ book.pub_date|date:'Y-m-d' }}</td>
63 <td>{{ book.publish }}</td>
64 <td><a href="/app01/book/{{ book.pk }}/delete" class="btn btn-danger">删除</a></td>
65 <td><a href="/app01/book/{{ book.pk }}/update" class="btn btn-info">编辑</a></td>
66 </tr>
67 {% empty %}
68 <td class="empty" colspan="6">暂无数据!</td>
69 {% endfor %}
70
71 </tbody>
72
73 </table>
74
75 </div>
76 </div>
77 </div>
78 {% endblock content %}
06 django模型层\book\templates\addbook.html
1 {% extends 'base.html' %}
2
3 {% block style %}
4 {{ block.super }}
5 <style>
6 .mybook{
7 margin-top: 50px;
8 }
9 .btn{
10 margin-top: 10px;
11 }
12 .opt_res{
13 margin-top: 50px;
14 color: red;
15 }
16 </style>
17 {% endblock style %}
18
19 {% block title %}
20 <title>book</title>
21 {% endblock title %}
22
23 {% block content %}
24 <h3>新增书籍</h3>
25
26 <div class="container mybook">
27 <div class="row">
28 <div class="col-md-6">
29 <form action="" method="post">
30 {% csrf_token %}
31 <div>
32 <label for="">书籍名称</label>
33 <input type="text" class="form-control" name="title" value={{ title }}>
34 </div>
35 <div>
36 <label for="">价格</label>
37 <input type="text" class="form-control" name="price" value={{ price }}>
38 </div>
39 <div>
40 <label for="">出版日期</label>
41 <input type="date" class="form-control" name="date" value={{ date }}>
42 </div>
43 <div>
44 <label for="">出版社</label>
45 <input type="text" class="form-control" name="publish" value={{ publish }}>
46 </div>
47
48 <input type="submit" class="btn btn-success pull-right">
49
50
51 </form>
52 <p class="opt_res">{{ opt_res }}</p>
53 </div>
54 </div>
55 </div>
56 {% endblock content %}
06 django模型层\book\templates\updatebook.html
1 {% extends 'base.html' %}
2
3 {% block style %}
4 {{ block.super }}
5 <style>
6 .mybook{
7 margin-top: 50px;
8 }
9 .btn{
10 margin-top: 10px;
11 }
12 .opt_res{
13 margin-top: 50px;
14 color: red;
15 }
16 </style>
17 {% endblock style %}
18
19 {% block title %}
20 <title>book</title>
21 {% endblock title %}
22
23 {% block content %}
24 <h3>修改书籍</h3>
25
26 <div class="container mybook">
27 <div class="row">
28 <div class="col-md-6">
29 <form action="" method="post">
30 {% csrf_token %}
31 <div>
32 <label for="">书籍名称</label>
33 <input type="text" class="form-control" name="title" value="{{ book_obj.title }}">
34 </div>
35 <div>
36 <label for="">价格</label>
37 <input type="text" class="form-control" name="price" value="{{ book_obj.price }}">
38 </div>
39 <div>
40 <label for="">出版日期</label>
41 <input type="date" class="form-control" name="date" value="{{ book_obj.pub_date|date:'Y-m-d' }}">
42 </div>
43 <div>
44 <label for="">出版社</label>
45 <input type="text" class="form-control" name="publish" value="{{ book_obj.publish }}">
46 </div>
47
48 <input type="submit" class="btn btn-success pull-right">
49
50
51 </form>
52 <p class="opt_res">{{ opt_res }}</p>
53 </div>
54 </div>
55 </div>
56 {% endblock content %}
来源：oschina
链接：https://my.oschina.net/u/4323671/blog/4090573