6.1 - 图书管理系统

Posted 2020-11-07 Alice的小屋

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实现功能：book单表的增删改查

主要代码：

models.py

from django.db import models

class Book(models.Model):
    id = models.AutoField(primary_key=True)
    title = models.CharField(max_length=32,unique=True)
    price = models.DecimalField(max_digits=8,decimal_places=2)
    pub_date = models.DateField()
    publish = models.CharField(max_length=32)

    def __str__(self):
        return self.title

settings.py

DATABASES = {
    \'default\': {
        \'ENGINE\': \'django.db.backends.mysql\',
        \'NAME\':\'book_single\',    # 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\':\'123\',    # 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
    }
}

python manage.py makemigrations

python manage.py migrate

urls.py

from django.contrib import admin
from django.urls import path,re_path

from books import views

urlpatterns = [
    path(\'books/\',views.books),
    path(\'addbook/\',views.addbook,name = \'addbook\'),

    # path(\'books/<int:id>/delete/\',views.delbook),
    re_path(r\'books/(\\d+)/delete\',views.delbook),

    # re_path(r\'books/(\\d+)/change/\',views.changebook),
    path(\'books/<int:id>/change/\',views.changebook),

    path(\'query/\',views.query)

]

views.py

from django.shortcuts import render,HttpResponse,redirect
from django.forms.models import model_to_dict

from books.models import Book


def books(request):
    book_list = Book.objects.all()
    return render(request,\'books.html\',locals())


def addbook(request):
    if request.method == \'POST\':
        title = request.POST.get(\'title\')
        price = request.POST.get(\'price\')
        pub_date = request.POST.get(\'pub-date\')
        publish = request.POST.get(\'publish\')
        if title == \'\' or price == \'\' or pub_date == \'\' or publish == \'\':
            return render(request, \'addbook.html\',{\'ret\':\'所有选项不能为空\'})
        Book.objects.create(title=title,price=price,pub_date=pub_date,publish=publish)
        return redirect(\'/books/\')
    else:
        return render(request,\'addbook.html\')


def delbook(request,id):
    Book.objects.filter(id=id).delete()
    return redirect(\'/books/\')  # 两次请求


def changebook(request,id):
    book_obj = Book.objects.filter(id=id).first()
    if request.method == \'POST\':
        title = request.POST.get(\'title\')
        price = request.POST.get(\'price\')
        pub_date = request.POST.get(\'pub-date\')
        publish = request.POST.get(\'publish\')
        if title == \'\' or price == \'\' or pub_date == \'\' or publish == \'\':
            return render(request, \'addbook.html\',{\'ret\':\'所有选项不能为空\'})
        Book.objects.filter(id=id).update(title=title,price=price,pub_date=pub_date,publish=publish)
        return redirect(\'/books/\')
    else:
        return render(request,\'change.html\',{\'book_obj\':book_obj})

base.html

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    {% block title %}
        <title>base</title>
    {% endblock title %}
    <!-- Bootstrap -->
    <link href="/static/bootstrap-3.3.7/css/bootstrap.min.css" rel="stylesheet">

    <!-- HTML5 shim 和 Respond.js 是为了让 IE8 支持 HTML5 元素和媒体查询（media queries）功能 -->
    <!-- 警告：通过 file:// 协议（就是直接将 html 页面拖拽到浏览器中）访问页面时 Respond.js 不起作用 -->
    <!--[if lt IE 9]>
      <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
      <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
    <![endif]-->

    <link rel="stylesheet" href="/static/base.css">

</head>
<body>
<div class="container my-con ">
    <div class="col-md-2 ">
        {% block operation %}
            <h3>operation</h3>
        {% endblock operation %}
    </div>

    <div class="col-md-10">
        {% block con %}
            <h3>content</h3>
        {% endblock con %}
    </div>
</div>


<!-- jQuery (Bootstrap 的所有 javascript 插件都依赖 jQuery，所以必须放在前边) -->
<script src="/static/jquery-3.2.1.min.js"></script>
<!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
<script src="/static/bootstrap-3.3.7/js/bootstrap.min.js"></script>
</body>
</html>

books.html

{% extends \'base.html\' %}

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

{% block operation %}
    <h3>查看书籍</h3>
{% endblock operation %}

{% block con %}
    <a href="{% url \'books:addbook\' %}" class="btn btn-primary" role="button">添加书籍</a>

    <div class="table-responsive">
        <table class="table table-striped table-bordered table-hover">
            <thead>
                <tr class="active">
                    <td><strong>书籍名单</strong></td>
                    <td><strong>价格</strong></td>
                    <td><strong>出版日期</strong></td>
                    <td><strong>出版社</strong></td>
                    <td><strong>删除操作</strong></td>
                    <td><strong>编辑操作</strong></td>
                </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="/books/{{ book.id }}/delete" class="btn btn-danger" role="button">删除</a></td>#}
                    <td><a href="/books/{{ book.pk }}/delete" class="btn btn-danger" role="button">删除</a></td>
                    <td><a href="/books/{{ book.pk }}/change" class="btn btn-info" role="button">编辑</a></td>
                </tr>
                {% endfor %}
            </tbody>
        </table>
    </div>

{% endblock con %}

addbook.html

{% extends \'base.html\' %}

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

{% block operation %}
    <h3>添加书籍</h3>
{% endblock %}

{% block con %}
    <form action="" method="post">
        {% csrf_token %}
        <div class="form-group">
            <label for="title">书籍名称</label>
            <input type="text" class="form-control" id="title" name="title" >
        </div>
        <div class="form-group">
            <label for="price">价格</label>
            <input type="text" class="form-control" id="price" name="price">
        </div>
        <div class="form-group">
            <label for="pub-date">出版日期</label>
            <input type="date" class="form-control" id="pub-date" name="pub-date">
        </div>
        <div class="form-group">
            <label for="publish">出版社</label>
            <input type="text" class="form-control" id="pub-date" name="publish">
        </div>
        <button type="submit" class="btn btn-success pull-right">提交</button>
    </form>
    <p style="color: red;">{{ ret }}</p>
{% endblock con %}

change.html

{% extends \'base.html\' %}

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

{% block operation %}
    <h3>编辑书籍</h3>
{% endblock %}

{% block con %}
    <form action="" method="post">
        {% csrf_token %}
        <div class="form-group">
            <label for="title">书籍名称</label>
            <input type="text" class="form-control" id="title" name="title" value="{{ book_obj.title }}" >
        </div>
        <div class="form-group">
            <label for="price">价格</label>
            <input type="text" class="form-control" id="price" name="price" value="{{ book_obj.price }}">
        </div>
        <div class="form-group">
            <label for="pub-date">出版日期</label>
            <input type="date" class="form-control" id="pub-date" name="pub-date" value="{{ book_obj.pub_date|date:\'Y-m-d\' }}">
        </div>
        <div class="form-group">
            <label for="publish">出版社</label>
            <input type="text" class="form-control" id="pub-date" name="publish" value="{{ book_obj.publish }}">
        </div>
        <button type="submit" class="btn btn-success pull-right">提交</button>
    </form>
    <p style="color: red;">{{ ret }}</p>
{% endblock con %}

https://github.com/alice-bj/book_single

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