模型层_多表练习
基于book系统，加上出版社和作者字段，如下：
html模板层
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>
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>
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 th,td{
24 text-align: center;
25 }
26 </style>
27 {% endblock style %}
28
29 {% block title %}
30 <title>book</title>
31 {% endblock title %}
32
33 {% block content %}
34 <h3>查看书籍</h3>
35
36 <div class="container mybook">
37 <div class="row">
38 <div class="col-md-7">
39 <form class="form-inline filter" action="">
40 <div class="form-group">
41 <div class="form-group other">
42 <label for="">书籍名称</label>
43 <input type="text" class="form-control" placeholder="python" name="title">
44 </div>
45 </div>
46 <button type="submit" class="btn btn-primary">查询</button>
47 </form>
48 <a href="/app01/book/add" class="btn btn-primary other">添加书籍</a>
49 <table class="table table-striped table-bordered">
50 <thead>
51 <tr>
52 <th>书籍名称</th>
53 <th>价格</th>
54 <th>出版日期</th>
55 <th>出版社</th>
56 <th>作者</th>
57 <th>操作</th>
58 </tr>
59 </thead>
60 <tbody>
61 {% for book in book_list %}
62 <tr>
63 <td>{{ book.title }}</td>
64 <td>{{ book.price }}</td>
65 <td>{{ book.pub_date|date:'Y-m-d' }}</td>
66 <td>{{ book.publish.name }}</td>
67 <td>
68 {% for author in book.authors.all %}
69 {% if forloop.last %}
70 <span>{{ author.name }}</span>
71 {% else %}
72 <span>{{ author.name }}</span>,
73 {% endif %}
74 {% endfor %}
75 </td>
76 <td>
77 <a href="/app01/book/{{ book.pk }}/update" class="btn btn-info">编辑</a>
78 <a href="/app01/book/{{ book.pk }}/delete" class="btn btn-danger">删除</a>
79 </td>
80 </tr>
81 {% empty %}
82 <td class="empty" colspan="6">暂无数据!</td>
83 {% endfor %}
84
85 </tbody>
86
87 </table>
88
89 </div>
90 </div>
91 </div>
92 {% endblock content %}
1 {% extends 'base.html' %}
2
3 {% block style %}
4 {{ block.super }}
5 <style>
6 .mybook {
7 margin-top: 50px;
8 }
9
10 .btn {
11 margin-top: 10px;
12 }
13
14 .opt_res {
15 margin-top: 50px;
16 color: red;
17 }
18 </style>
19 {% endblock style %}
20
21 {% block title %}
22 <title>book</title>
23 {% endblock title %}
24
25 {% block content %}
26 <h3>新增书籍</h3>
27
28 <div class="container mybook">
29 <div class="row">
30 <div class="col-md-6">
31 <form action="" method="post">
32 {% csrf_token %}
33 <div class="form-group">
34 <label for="">书籍名称</label>
35 <input type="text" class="form-control" name="title" value={{ title }}>
36 </div>
37 <div class="form-group">
38 <label for="">价格</label>
39 <input type="text" class="form-control" name="price" value={{ price }}>
40 </div>
41 <div class="form-group">
42 <label for="">出版日期</label>
43 <input type="date" class="form-control" name="date" value={{ date }}>
44 </div>
45 <div class="form-group">
46 <label for="">出版社</label>
47 <select name="publish_id" id="" class="form-control">
48 {% for publish in publish_obj %}
49 <option value={{ publish.pk }}>{{ publish.name }}</option>
50 {% endfor %}
51 </select>
52 </div>
53 <div class="form-group">
54 <label for="">作者</label>
55 <select type="text" name="authors_id_list" multiple class="form-control">
56 {% for author in author_obj %}
57 <option value="{{ author.pk }}">{{ author.name }}</option>
58 {% endfor %}
59 </select>
60 </div>
61 <input type="submit" class="btn btn-success pull-right">
62 </form>
63 <p class="opt_res">{{ opt_res }}</p>
64 </div>
65 </div>
66 </div>
67 {% endblock content %}
1 {% extends 'base.html' %}
2
3 {% block style %}
4 {{ block.super }}
5 <style>
6 .mybook {
7 margin-top: 50px;
8 }
9
10 .btn {
11 margin-top: 10px;
12 }
13
14 .opt_res {
15 margin-top: 50px;
16 color: red;
17 }
18 </style>
19 {% endblock style %}
20
21 {% block title %}
22 <title>book</title>
23 {% endblock title %}
24
25 {% block content %}
26 <h3>修改书籍</h3>
27
28 <div class="container mybook">
29 <div class="row">
30 <div class="col-md-6">
31 <form action="" method="post">
32 {% csrf_token %}
33 <div class="form-group">
34 <label for="">书籍名称</label>
35 <input type="text" class="form-control" name="title" value="{{ book_obj.title }}">
36 </div>
37 <div class="form-group">
38 <label for="">价格</label>
39 <input type="text" class="form-control" name="price" value="{{ book_obj.price }}">
40 </div>
41 <div class="form-group">
42 <label for="">出版日期</label>
43 <input type="date" class="form-control" name="date"
44 value="{{ book_obj.pub_date|date:'Y-m-d' }}">
45 </div>
46 <div class="form-group">
47 <label for="">出版社</label>
48 <select name="publish_id" id="" class="form-control">
49 {% for publish in publish_obj %}
50 {% if book_obj.publish == publish %}
51 <option value={{ publish.pk }} selected='True'>{{ publish.name }}</option>
52 {% else %}
53 <option value={{ publish.pk }}>{{ publish.name }}</option>
54 {% endif %}
55 {% endfor %}
56 </select>
57 </div>
58 <div class="form-group">
59 <label for="">作者</label>
60 <select type="text" name="authors_id_list" multiple class="form-control">
61 {% for author in author_obj %}
62 {% if author in book_obj.authors.all %}
63 <option value="{{ author.pk }}" selected="True">{{ author.name }}</option>
64 {% else %}
65 <option value="{{ author.pk }}">{{ author.name }}</option>
66 {% endif %}
67 {% endfor %}
68 </select>
69 </div>
70 <input type="submit" class="btn btn-success pull-right">
71 </form>
72 <p class="opt_res">{{ opt_res }}</p>
73 </div>
74 </div>
75 </div>
76 {% endblock content %}
book控制器
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'))),
]
book_app01控制器
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),
]
book_app01模型层
06 django模型层\book\book_app01\models.py
1 from django.db import models
2
3 # Create your models here.
4
5
6 class Publish(models.Model):
7 id = models.AutoField(primary_key=True)
8 name = models.CharField(max_length=32)
9 city = models.CharField(max_length=32)
10 email = models.EmailField()
11
12 def __str__(self):
13 return self.name
14
15
16 class Author(models.Model):
17 id = models.AutoField(primary_key=True)
18 name = models.CharField(max_length=32)
19
20 # 一对一 与AuthorDetail
21 authorDetail = models.OneToOneField(to='AuthorDetail', on_delete=models.CASCADE)
22
23 def __str__(self):
24 return self.name
25
26
27 class AuthorDetail(models.Model):
28 id = models.AutoField(primary_key=True)
29 age = models.BigIntegerField()
30 addr = models.CharField(max_length=32)
31 phone = models.BigIntegerField()
32
33 # def __str__(self):
34 # return self.phone
35
36
37 class Book(models.Model):
38 id = models.AutoField(primary_key=True)
39 title = models.CharField(max_length=32, unique=True)
40 price = models.DecimalField(max_digits=5, decimal_places=2)
41 pub_date = models.DateField()
42 read_num = models.BigIntegerField(default=0)
43 comment_num = models.BigIntegerField(default=0)
44
45 # 一对多
46 publish = models.ForeignKey(to='Publish', to_field='id', on_delete=models.CASCADE)
47
48 # 多对多 自动创建第三张表 book_authors
49 authors = models.ManyToManyField(to='Author',)
50
51 def __str__(self):
52 return self.title
53
54
55 class Employee(models.Model):
56 id = models.AutoField(primary_key=True)
57 name = models.CharField(max_length=32, unique=True)
58 age = models.BigIntegerField()
59 sal = models.DecimalField(max_digits=5, decimal_places=1)
60 dep = models.CharField(max_length=32)
61
62 def __str__(self):
63 return self.name
book_app01视图层
1 from django.shortcuts import render,redirect
2 from book_app01.models import *
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 exception as e:
13 title = ''
14 book_list = Book.objects.filter(title__contains=title)
15
16 return render(request, 'book.html', locals())
17
18
19 def add_book(request):
20 method = request.method
21 res = Publish.objects.all().exists()
22 res_author = Author.objects.all().exists()
23 if not res:
24 Publish.objects.create(name='人民出版社', city='北京', email='123@qq.com')
25 Publish.objects.create(name='南京出版社', city='南京', email='456@qq.com')
26 Publish.objects.create(name='东京出版社', city='东京', email='789@qq.com')
27 if not res_author:
28 d1 = AuthorDetail.objects.create(age=18, addr='北京', phone=13537730001)
29 d2 = AuthorDetail.objects.create(age=28, addr='北京', phone=13667730001)
30 d3 = AuthorDetail.objects.create(age=38, addr='深圳', phone=13967730001)
31 d2 = AuthorDetail.objects.filter(id=2).first()
32 d3 = AuthorDetail.objects.filter(id=3).first()
33 Author.objects.create(name='杨一', authorDetail_id=1)
34 Author.objects.create(name='杨二', authorDetail_id=d2.id)
35 Author.objects.create(name='杨三', authorDetail=d3)
36 if method == 'POST':
37 req = request.POST
38 print('req---->', req)
39 title = req.get('title').strip()
40 price = req.get('price').strip()
41 date = req.get('date').strip()
42 publish_id = req.get('publish_id').strip()
43 # get只能取到authors_id_list列表的最后一个值，getlist取整个authors_id_list列表
44 authors_id_lis = req.getlist('authors_id_list')
45 print('authors_id_lis------->', authors_id_lis)
46 if title and price and date and publish_id and authors_id_lis:
47 select_res = Book.objects.filter(title=title).exists()
48 if not select_res:
49 publish_obj = Publish.objects.filter(id=publish_id).first()
50 # res = Book.objects.create(title=title, price=price, pub_date=date, publish=publish_obj)
51 res = Book.objects.create(title=title, price=price, pub_date=date, publish_id=publish_id)
52 res.authors.add(*authors_id_lis)
53 return redirect('/app01/book')
54 opt_res = '书籍【%s】已存在,请修改后提交！'%title
55 else:
56 opt_res = '输入不能为空,请修改后提交！'
57 publish_obj = Publish.objects.all()
58 author_obj = Author.objects.all()
59 return render(request, 'addbook.html', locals())
60
61
62 def update_book(request, num):
63 book_obj = Book.objects.filter(id=num).first()
64 publish_obj = Publish.objects.all()
65 author_obj = Author.objects.all()
66 if book_obj:
67 method = request.method
68 if method == 'POST':
69 req = request.POST
70 print('req---->', req)
71 title = req.get('title').strip()
72 price = req.get('price').strip()
73 date = req.get('date').strip()
74 publish_id = req.get('publish_id').strip()
75 # get只能取到authors_id_list列表的最后一个值，getlist取整个authors_id_list列表
76 authors_id_lis = req.getlist('authors_id_list')
77 print('authors_id_lis------->', authors_id_lis)
78 if title and price and date and publish_id and authors_id_lis:
79 select_res = Book.objects.exclude(id=num).filter(title=title)
80 if not select_res:
81 Book.objects.filter(id=num).update(title=title, price=price, pub_date=date, publish_id=publish_id)
82 # book_obj.authors.clear()
83 # book_obj.authors.add(*authors_id_lis)
84 book_obj.authors.set(authors_id_lis) # 该方法等同于上面两个步骤
85 return redirect('/app01/book')
86 opt_res = '书籍【%s】已存在,请修改后提交！' % select_res[0].title
87 else:
88 opt_res = '输入不能为空,请修改后提交！'
89 return render(request, 'updatebook.html', locals())
90 return redirect('/app01/book')
91
92
93 def delete_book(request, num=None):
94 book_obj = Book.objects.filter(id=num).first()
95 if book_obj:
96 book_obj.authors.clear()
97 book_obj.delete()
98 return redirect('/app01/book')
来源：oschina
链接：https://my.oschina.net/u/4323671/blog/4090576