django之两个使用模板的例子

from django.db import models

# Create your models here.
class Book(models.Model):
    title=models.CharField(max_length=32,unique=True)
    price=models.DecimalField(max_digits=8,decimal_places=2,null=True)
    pub_date=models.DateField()
    publish=models.CharField(max_length=32)
    is_pub=models.BooleanField(default=True)
    authors=models.ManyToManyField(to="Author")

class AuthorDetail(models.Model):
    gf=models.CharField(max_length=32)
    tel=models.CharField(max_length=32)

class Author(models.Model):
    name=models.CharField(max_length=32)
    age=models.IntegerField()
    # 与AuthorDetail建立一对一的关系
    # ad=models.ForeignKey(to="AuthorDetail",to_field="id",on_delete=models.CASCADE,unique=True)
    #OneToOneField 表示创建一对一关系。on_delete=models.CASCADE 表示级联删除。假设a表删除了一条记录，b表也还会删除对应的记录
    ad=models.OneToOneField(to="AuthorDetail",to_field="id",on_delete=models.CASCADE,)

from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    # url(r'',views.index),#这一条不能放上面，会造成死循环
    url(r'index/$',views.index),
    url(r'books/add/$',views.add),
    url(r'books/manage/',views.manage),
    url(r'books/delete/(?P<id>d+)',views.delete),
    url(r'books/modify/(?P<id>d+)',views.modify),
]

from django.shortcuts import render,HttpResponse
from app01 import models

# Create your views here.


def index(request):
    ret=models.Book.objects.all().exists()#True 和 False
    if ret:
        book_list=models.Book.objects.all()
        return render(request,'index.html',{'book_list':book_list})
    else:
        # hint='<script>alert("没有书籍，请添加书籍")；window.location.href="/books/add"</script>'
        hint='<script>alert("没有书籍，请添加书籍");window.location.href="/books/add/"</script>'

        return HttpResponse(hint)

def add(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")
        is_pub=request.POST.get("is_pub")
        #插入一条记录
        obj=models.Book.objects.create(title=title,price=price,publish=publish,pub_date=pub_date,is_pub=is_pub)
        print(obj.title)
        hint = '<script>alert("添加成功");window.location.href="/index/"</script>'
        return HttpResponse(hint)
    return render(request,"add.html")

def manage(request):
    ret=models.Book.objects.all().exists()
    print(ret)
    if ret:
        book_list=models.Book.objects.all()
        return render(request,"manage.html",{"book_list":book_list})
    else:
        hint='<script>alert("没有书籍，请添加书籍");window.location.href="/books/add"</script>'
        return HttpResponse(hint)

def delete(request,id):
    ret=models.Book.objects.filter(id=id).delete()
    print('删除记录%s'%ret)
    if ret[0]:
        hint='<script>alert("删除成功");window.location.href="/index/"</script>'
        return HttpResponse(hint)
    else:
        hint='<script>alert("删除失败");window.location.href="/index/"</script>'
        return HttpResponse(hint)
def modify(request,id):
    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")
        is_pub = request.POST.get("is_pub")
        # 更新一条记录
        ret = models.Book.objects.filter(id=id).update(title=title, price=price, publish=publish, pub_date=pub_date,
                                                       is_pub=is_pub)
        print('更新记录%s'%ret)

        if ret:  # 判断返回值为1
            hint = '<script>alert("修改成功");window.location.href="/index/"</script>'
            return HttpResponse(hint)  # js跳转
        else:  # 返回为0
            hint = '<script>alert("修改失败");window.location.href="/index/"</script>'
            return HttpResponse(hint)  # js跳转

    book=models.Book.objects.get(id=id)
    return render(request,"modify.html",{"book":book})

{% extends 'base.html' %}
{% block title %}
    <title>查看书籍</title>
{% endblock title %}

{% block content %}
    <h3>查看书籍</h3>
    <table class="table table-hover table-striped ">
                <thead>
                     <tr>
                         <th>名称</th>
                         <th>价格</th>
                         <th>出版日期</th>
                         <th>出版社</th>
                         <th>是否出版</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>
                              {% if book.is_pub %}
                              已出版
                              {% else %}
                              未出版
                              {% endif %}
                          </td>
                      </tr>
                      {% endfor %}

                </tbody>
            </table>

{% endblock content %}

{% extends 'base.html' %}

{% block title %}

<title>添加书籍</title>

{% endblock title %}

{% block content %}
<h3>添加书籍</h3>
<form action="" method="post">
     {% csrf_token %}
     <div class="form-group">
        <label for="">书籍名称</label>
        <input type="text" name="title" class="form-control">
    </div>
    <div class="form-group">
        <label for="">价格</label>
        <input type="text" name="price" class="form-control">
    </div>
    <div class="form-group">
         <label for="">出版日期</label>
        <input type="date" name="pub_date" class="form-control">
    </div>
    <div class="form-group">
         <label for="">出版社</label>
         <input type="text" name="publish" class="form-control">
    </div>
    <div class="form-group">
         <label for="">是否出版</label>
        <select name="is_pub" id="" class="form-control">
            <option value="1">已出版</option>
            <option value="0" selected="selected">未出版</option>
        </select>
    </div>
    <input type="submit" class="btn btn-success pull-right" value="添加">
</form>

{% endblock content %}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    {% block title %}
    <title>Title</title>
    {% endblock title %}
    <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .header {
             100%;
            height: 60px;
            background-color: #369;
        }

        .title {

            line-height: 60px;
            color: white;
            font-weight: 100;
            margin-left: 20px;
            font-size: 20px;
        }
        .container{
            margin-top: 20px;
        }
    </style>
</head>
<body>

<div class="header">
    <p class="title">
        书籍操作
    </p>
</div>

<div class="container">
    <div class="row">
        <div class="col-md-3">
            <div class="panel panel-danger">
                <div class="panel-heading"><a href="http://127.0.0.1:8000/index/">查看书籍</a></div>
                <div class="panel-body">
                    Panel content
                </div>
            </div>
            <div class="panel panel-success">
                <div class="panel-heading"><a href="http://127.0.0.1:8000/books/add/">添加书籍</a></div>
                <div class="panel-body">
                    Panel content
                </div>
            </div>
            <div class="panel panel-warning">
                <div class="panel-heading"><a href="http://127.0.0.1:8000/books/manage/">管理书籍</a></div>
                <div class="panel-body">
                    Panel content
                </div>
            </div>
        </div>
        <div class="col-md-9">
           {% block content %}

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

</body>
</html>

{% extends 'base.html' %}
{% block title %}
    <title>管理书籍</title>
{% endblock title %}

{% block content %}
    <h3>管理书籍</h3>
<table class="table table-hover table-striped ">
                <thead>
                     <tr>
                         <th>名称</th>
                         <th>价格</th>
                         <th>出版日期</th>
                         <th>出版社</th>
                         <th>是否出版</th>
                         <th>删除</th>
                         <th>编辑</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>
                              {% if book.is_pub %}
                              已出版
                              {% else %}
                              未出版
                              {% endif %}
                          </td>
                          <td>
                              <a href="/books/delete/{{ book.id }}" >
                                  <button type="button" class="btn btn-danger" data-toggle="modal" id="modelBtn">删除</button>
                              </a>
                          </td>
                          <td>
                                <a href="/books/modify/{{ book.id }}">
                                    <button type="button" class="btn btn-success" data-toggle="modal">编辑</button>
                                </a>
                          </td>
                      </tr>
                      {% endfor %}

                </tbody>
            </table>

{% endblock content %}

{% extends 'base.html' %}

{% block title %}

<title>修改书籍</title>

{% endblock title %}

{% block content %}
<h3>修改书籍</h3>
<form action="" method="post">
     {% csrf_token %}
     <div class="form-group">
        <label for="">书籍名称</label>
        <input type="text" name="title" class="form-control" value="{{ book.title }}">
    </div>
    <div class="form-group">
        <label for="">价格</label>
        <input type="text" name="price" class="form-control" value="{{ book.price }}">
    </div>
    <div class="form-group">
         <label for="">出版日期</label>
        <input type="date" name="pub_date" class="form-control" value="{{ book.pub_date|date:"Y-m-d" }}">
    </div>
    <div class="form-group">
         <label for="">出版社</label>
         <input type="text" name="publish" class="form-control" value="{{ book.publish }}">
    </div>
    <div class="form-group">
         <label for="">是否出版</label>
        <select name="is_pub" id="" class="form-control">
            {% if book.is_pub %}
                <option value="1" selected="selected">已出版</option>
                <option value="0">未出版</option>
            {% else %}
                <option value="1">已出版</option>
                <option value="0" selected="selected">未出版</option>
            {% endif %}

        </select>
    </div>
    <input type="submit" class="btn btn-default pull-right" value="修改">
</form>

{% endblock content %}

django使用一对多和多对多关系建表之后的增删改查

-------models.py-----

from django.db import models

# Create your models here.

class Book(models.Model):
    title=models.CharField(max_length=32)
    price=models.DecimalField(max_digits=6,decimal_places=2)
    create_time=models.DateField()
    memo=models.CharField(max_length=32,default="")
    publish=models.ForeignKey(to="Publish",default=1)
    author=models.ManyToManyField("Author")#on_delete=models.CASCADE()默认级联删除
    def __str__(self):
        return self.title


class Publish(models.Model):
    name=models.CharField(max_length=32)
    email=models.CharField(max_length=32)

class Author(models.Model):
    name=models.CharField(max_length=32)

    def __str__(self): return self.name

-----urls.py----

from django.conf.urls import url,include
from django.contrib import admin
from app01 import views

urlpatterns = [
    url(r'^admin/', admin.site.urls), 
    url(r'^books/$',views.books), #查看
    url(r'^addbook/$',views.addbook), #增加
    url(r'^delbook/(d+)/$',views.delbook), #删除
    url(r'editbook/(d+)/$',views.editbook), #修改
]

----views.py 在app01下面-------

from django.shortcuts import render,HttpResponse,redirect
from .models import *  

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") #get方法取的是html页面中的name属性
        price= request.POST.get("price")
        date = request.POST.get("date")
        publish_id=request.POST.get("publish_id")
        # author_id_list = request.POST.get("author_id_list") #此方法只能取到最后一个值
        author_id_list = request.POST.getlist("author_id_list") #有多个值的注意要用getlist

        #绑定书籍与出版社一对多的关系
        obj=Book.objects.create(title=title,price=price,create_time=date,publish_id=publish_id)
        #绑定书籍与作者多对多的关系
        obj.author.add(*author_id_list)
        # obj.author.remove(1,2) #解除关系
        # obj.author.clear() #清空所有关系
        return redirect("/books/")

    else:
        publish_list=Publish.objects.all()
        author_list=Author.objects.all()

    return render(request,"addbook.html",locals())


def delbook(request,id):
    Book.objects.filter(id=id).delete()
    return redirect("/books/")

def editbook(request,id):

    if request.method=="POST":
        title=request.POST.get("title")  #get方法取的是html页面中的name属性
        price=request.POST.get("price") 
        date=request.POST.get("date")
        publish_id=request.POST.get("publish_id")
        author_id_list=request.POST.getlist("author_id_list")


        Book.objects.filter(id=id).update(title=title,price=price,create_time=date,publish_id=publish_id)
        book=Book.objects.filter(id=id).first()
        # book.author.clear()
        # book.author.add(*author_id_list)
        book.author.set(author_id_list) #相当于上面两条

        return redirect ("/books/")


    edit_obj=Book.objects.filter(id=id).first()  #加first从queryset得到 models对象
    publish_list = Publish.objects.all()
    author_list = Author.objects.all()
    return render(request,"editbook.html",locals())

 ----books.html----

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/bs/css/bootstrap.css">
</head>
<body>
<div class="container" style="margin-top:100px">
    <div class="row">
        <div class="col-md-6 col-md-offset-3">
            <a href="/addbook/"><button class="btn btn-primary">添加数据</button></a>
            <table class="table table-bordered table-striped">
            <thead>
            <tr>
            <th>序号</th>
            <th>书名</th>
            <th>价格</th>
            <th>出版时间</th>
                <th>出版社</th>
                <th>作者</th>
                <th>操作</th>
            </tr>
            </thead>
            <tbody>
            {% for book in book_list %}
                <tr>
                    <td>{{ forloop.counter }}</td>
                    <td>{{ book.title }}</td>
                    <td>{{ book.price }}</td>
                    <td>{{ book.create_time|date:"Y-m-d" }}</td>
                <td>{{  book.publish.name }}</td>
                <td> {% for author in book.author.all %}
                    {{ author.name }}
                    {% if not forloop.last %}
                        ,
                    {% endif %}
                    {% endfor %}

                </td>
                <td>
                    <a href="/delbook/{{ book.pk }}/">删除</a>
                    <a href="/editbook/{{ book.pk }}/">编辑</a>
                </td>
                </tr>
            {% endfor %}
            </tbody>
            </table>
        </div>
    </div>

</div>

</body>
</html>

-----addbook.html-----

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/bs/css/bootstrap.css">
</head>
<body>
<div class="container" style="margin-top:100px">
    <div class="row">
        <div class="col-md-6 col-md-offset-3">
            <form action="/addbook/" method="post">
                {% csrf_token %}
                <p>书籍名称<input type="text" name="title"></p>
                <p>书籍价格<input type="text" name="price"></p>
                <p>出版日期<input type="text" name="date"></p>
                <p><select name="publish_id" id="">
                    {% for publish in publish_list %}
                    <option value="{{ publish.pk }}">{{ publish.name }}</option>
                    {% endfor %}
                </select>
                </p>
                <p><select name="author_id_list" id="" multiple>
                    {% for author in author_list %}
                    <option value="{{ author.pk }}">{{ author.name }}</option>
                    {% endfor %}
                </select>
                </p>
                <input type="submit" class="btn btn-default">
            </form>

        </div>
    </div>

</div>

</body>
</html>

-------editbook.html-----

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/bs/css/bootstrap.css">
</head>
<body>
<div class="container" style="margin-top:100px">
    <div class="row">
        <div class="col-md-6 col-md-offset-3">
            <form action="/editbook/{{ edit_obj.id }}/" method="post">
                {% csrf_token %}
                <p>书籍名称<input type="text" name="title" value="{{ edit_obj.title }}"></p>
                <p>书籍价格<input type="text" name="price" value="{{ edit_obj.price }}"></p>
                <p>出版日期<input type="text" name="date" value="{{ edit_obj.create_time|date:"Y-m-d" }}"></p>
                <p><select name="publish_id" id="">
                    {% for publish in publish_list %}
                        {%  if edit_obj.publish == publish %}
                        <option  selected value="{{ publish.pk }}">{{ publish.name }}</option>
                        {% else %}
                        <option value="{{ publish.pk }}">{{ publish.name }}</option>
                        {% endif %}
                    {% endfor %}
                </select>
                </p>
                <p><select name="author_id_list" id="" multiple>
                    {% for author in author_list %}
                        {%  if author in edit_obj.author.all %}
                        <option  selected value="{{ author.pk }}">{{ author.name }}</option>
                        {% else %}
                        <option value="{{ author.pk }}">{{ author.name }}</option>
                        {% endif %}
                    {% endfor %}
                </select>
                </p>
                <input type="submit" class="btn btn-default">
            </form>

        </div>
    </div>

</div>

</body>
</html>