09 django模型层_单表练习

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ookooksettings.py

"""
Django settings for book project.

Generated by 'django-admin startproject' using Django 2.2.3.

For more information on this file, see
https://docs.djangoproject.com/en/2.2/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.2/ref/settings/
"""

import os

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'cex-c#ja^@=p_dp#ak0-@=^ws!_-f6g#*52jb5!3%xhe4!dc^*'

# 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',
    # 'book_app01.apps.BookApp01Config',
    'book_app01',
]

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 = 'book.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 = 'book.wsgi.application'


# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases

# DATABASES = {
#     'default': {
#         'ENGINE': 'django.db.backends.sqlite3',
#         'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
#     }
# }


# Password validation
# https://docs.djangoproject.com/en/2.2/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/2.2/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/2.2/howto/static-files/

STATIC_URL = '/static/'

STATICFILES_DIRS = [
    os.path.join(BASE_DIR, 'statics')
]
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME':'orm',# 要连接的数据库，连接前需要创建好
        'USER':'root',# 连接数据库的用户名
        'PASSWORD':'root',# 连接数据库的密码
        'HOST':'127.0.0.1',# 连接主机，默认本级
        'PORT':3306 #  端口 默认3306
    }
}

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'console':{
            'level':'DEBUG',
            'class':'logging.StreamHandler',
        },
    },
    'loggers': {
        'django.db.backends': {
            'handlers': ['console'],
            'propagate': True,
            'level':'DEBUG',
        },
    }
}

06 django模型层ookook\__init__.py

import pymysql
pymysql.install_as_MySQLdb()

06 django模型层ookookurls.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ookook_app01models.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ookook_app01urls.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ookook_app01views.py

from django.shortcuts import render,redirect
from book_app01.models import Book

# Create your views here.


def book(request):
    method = request.method
    req = request.POST if request.POST else request.GET
    try:
        title = req.get('title') if req.get('title') else ''
    except:
        title = ''
    book_list = Book.objects.filter(title__contains=title)
    '''
        # 1 查询人民出版社出版过的价格大于200的书籍
        res = Book.objects.filter(publish="人民出版社",price__gt=200)
        # 2 查询2017年8月出版的所有以py开头的书籍名称
        res = Book.objects.filter(pub_date__contains="2017-08",title__startswith='py').values('title')
        # 3 查询价格为50,100或者150的所有书籍名称及其出版社名
        res = Book.objects.filter(price__in=[50,100,150]).values('title','publish')
        # 4 查询价格在100到200之间的所有书籍名称及其价格
        res = Book.objects.filter(price__range=[100,200]).values('title','price')
        # 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）
        res = Book.objects.filter(publish="人民出版社").values('price').distinct().order_by('-price')
        print('res----------->',res)
    '''
    return  render(request, 'book.html',locals())


def add_book(request):
    method = request.method
    if method == 'POST':
        req = request.POST
        title = req['title'].strip()
        price = req['price'].strip()
        date = req['date'].strip()
        publish = req['publish'].strip()
        if title and price and date and publish:
            selct_res = Book.objects.filter(title=title)
            if not selct_res:
                Book.objects.create(title=title,price=price,pub_date=date,publish=publish)
                return redirect('/app01/book')
            opt_res = '书籍【%s】已存在,请修改后提交！'%title
        else:
            opt_res = '输入不能为空,请修改后提交！'
    return render(request, 'addbook.html', locals())


def update_book(request, num):
    select_res = Book.objects.filter(id=num)
    if select_res:
        method = request.method
        book_obj = select_res[0]
        if method == 'POST':
            req = request.POST
            title = req['title'].strip()
            price = req['price'].strip()
            date = req['date'].strip()
            publish = req['publish'].strip()
            if title and price and date and publish:
                selct_res = Book.objects.exclude(id=num).filter(title=title)
                if not selct_res:
                    Book.objects.filter(id=num).update(title=title, price=price, pub_date=date, publish=publish)
                    return redirect('/app01/book')
                opt_res = '书籍【%s】已存在,请修改后提交！' % selct_res[0].title
            else:
                opt_res = '输入不能为空,请修改后提交！'
        return render(request, 'updatebook.html', locals())
    return redirect('/app01/book')

def delete_book(request, num=None):
    select_res = Book.objects.filter(id=num)
    if select_res:
        Book.objects.filter(id=num).delete()
    return redirect('/app01/book')

06 django模型层ook emplatesadvertise.html

<div class="action">
    <div class="panel panel-danger">
        <div class="panel-heading">2019进击的菜鸟</div>
        <div class="panel-body">
            web框架开发
        </div>
        <div class="panel-body">
            crm&爬虫
        </div>
        <div class="panel-body">
            算法&设计模式&企业应用
        </div>
        <div class="panel-body">
            vue项目
        </div>
        <div class="panel-body">
            复习python&自动化&性能
        </div>
    </div>
    <div class="panel panel-warning">
        <div class="panel-heading">2020进击的小鸟</div>
        <div class="panel-body">
            fighting!
        </div>
    </div>
    <div class="panel panel-success">
        <div class="panel-heading">2021进击的大鸟</div>
        <div class="panel-body">
            go on !
        </div>
    </div>
</div>

06 django模型层ook emplatesase.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    {% block title %}
        <title>base——title</title>
    {% endblock title %}
    <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"
          integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
    {% block style %}
        <style type="text/css">
        *{
            padding: 0;
            margin:0;
        }
        .header{
            width:100%;
            height: 50px;
            background-color: #369;
        }
        body{
            background:#FFF url('/static/base.jpg') repeat-x 0;
            background-attachment: fixed;
        }
    </style>
    {% endblock style %}

</head>
<body>

<div class="header"></div>

<div class="container">
    <div class="row">
        <div class="col-md-3">
            {% include 'advertise.html' %}
        </div>
        <div class="col-md-9">
            {% block content%}
            <h3>base_content</h3>
            {% endblock %}
        </div>
    </div>
</div>

</body>
{% block js %}
<script type="text/javascript" src="/static/jquery-3.3.1.js"></script>
{% endblock js %}
</html>

06 django模型层ook emplatesook.html

{% extends 'base.html' %}

{% block style %}
    {{ block.super }}
    <style>
        .mybook {
            margin-top: 40px;
        }

        .btn {
            margin-top: 5px;
        }
        .other{
            margin-top: 5px;
        }
        .filter{
            margin-bottom: 30px;
        }
        .empty{
            text-align: center;
            color: #D0D0D0;
        }
    </style>
{% endblock style %}

{% block title %}
    <title>book</title>
{% endblock title %}

{% block content %}
    <h3>查看书籍</h3>

    <div class="container mybook">
        <div class="row">
            <div class="col-md-6">
                <form class="form-inline filter" action="">
                    <div class="form-group">
                        <div class="form-group other">
                            <label for="">书籍名称</label>
                            <input type="text" class="form-control"  placeholder="python" name="title">
                        </div>
                    </div>
                    <button type="submit" class="btn btn-primary">查询</button>
                </form>
                <a href="/app01/book/add" class="btn btn-primary other">添加书籍</a>
                <table class="table table-striped table-bordered">
                    <thead>
                    <tr>
                        <th>书籍名称</th>
                        <th>价格</th>
                        <th>出版日期</th>
                        <th>出版社</th>
                        <th>删除操作</th>
                        <th>编辑操作</th>
                    </tr>
                    </thead>
                    <tbody>
                    {% for book in book_list %}
                        <tr>
                            <td>{{ book.title }}</td>
                            <td>{{ book.price }}</td>
                            <td>{{ book.pub_date|date:'Y-m-d' }}</td>
                            <td>{{ book.publish }}</td>
                            <td><a href="/app01/book/{{ book.pk }}/delete" class="btn btn-danger">删除</a></td>
                            <td><a href="/app01/book/{{ book.pk }}/update" class="btn btn-info">编辑</a></td>
                        </tr>
                        {% empty %}
                            <td class="empty" colspan="6">暂无数据!</td>
                    {% endfor %}

                    </tbody>

                </table>

            </div>
        </div>
    </div>
{% endblock content %}

06 django模型层ook emplatesaddbook.html

{% extends 'base.html' %}

{% block style %}
    {{ block.super }}
    <style>
        .mybook{
            margin-top: 50px;
        }
        .btn{
            margin-top: 10px;
        }
    .opt_res{
        margin-top: 50px;
        color: red;
    }
    </style>
{% endblock style %}

{% block title %}
    <title>book</title>
{% endblock title %}

{% block content %}
    <h3>新增书籍</h3>

<div class="container mybook">
     <div class="row">
         <div class="col-md-6">
             <form action="" method="post">
                 {% csrf_token %}
                 <div>
                     <label for="">书籍名称</label>
                     <input type="text" class="form-control" name="title" value={{ title }}>
                 </div>
                 <div>
                     <label for="">价格</label>
                     <input type="text" class="form-control" name="price" value={{ price }}>
                 </div>
                 <div>
                     <label for="">出版日期</label>
                     <input type="date" class="form-control" name="date" value={{ date }}>
                 </div>
                 <div>
                     <label for="">出版社</label>
                     <input type="text" class="form-control" name="publish" value={{ publish }}>
                 </div>

                 <input type="submit" class="btn btn-success pull-right">


             </form>
             <p class="opt_res">{{ opt_res }}</p>
         </div>
     </div>
</div>
{% endblock content %}

06 django模型层ook emplatesupdatebook.html

{% extends 'base.html' %}

{% block style %}
    {{ block.super }}
    <style>
        .mybook{
            margin-top: 50px;
        }
        .btn{
            margin-top: 10px;
        }
        .opt_res{
            margin-top: 50px;
            color: red;
        }
    </style>
{% endblock style %}

{% block title %}
    <title>book</title>
{% endblock title %}

{% block content %}
    <h3>修改书籍</h3>

<div class="container mybook">
     <div class="row">
         <div class="col-md-6">
             <form action="" method="post">
                 {% csrf_token %}
                 <div>
                     <label for="">书籍名称</label>
                     <input type="text" class="form-control" name="title" value="{{ book_obj.title }}">
                 </div>
                 <div>
                     <label for="">价格</label>
                     <input type="text" class="form-control" name="price" value="{{ book_obj.price }}">
                 </div>
                 <div>
                     <label for="">出版日期</label>
                     <input type="date" class="form-control" name="date" value="{{ book_obj.pub_date|date:'Y-m-d' }}">
                 </div>
                 <div>
                     <label for="">出版社</label>
                     <input type="text" class="form-control" name="publish" value="{{ book_obj.publish }}">
                 </div>

                 <input type="submit" class="btn btn-success pull-right">


             </form>
             <p class="opt_res">{{ opt_res }}</p>
         </div>
     </div>
</div>
{% endblock content %}