S20_DAY16--作业v1.0

app01/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="")

    # book_obj.publish: 与这本书籍关联的出版社对象
    publish=models.ForeignKey(to="Publish",default=1)
    # book_obj.author.all():  与这本书关联的作者对象集合,Queryset []
    authors=models.ManyToManyField("Author") # 自动创建第三张表

    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



# class Author2Book(models.Model):
#     book=models.ForeignKey("Book")
#     author=models.ForeignKey("Author")

[projectname]/urls.py

"""cms_s20 URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/1.11/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.conf.urls import url, include
    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import url,include
from django.contrib import admin
from django.shortcuts import HttpResponse

from app01.views import *

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    # url(r'^timer/$', timer), # timer(request)
    # url(r'^books_achrive/(d+)/$', book_detail), # book_detail(request,3)
    # #url(r'^books_achrive/(d+)/(d+)/$', books_achrive), # books_achrive(request,2012,12)
    # url(r'^books_achrive/(?P<year>d+)/(?P<month>d+)/$', books_achrive2), # books_achrive(request,year=2012,month=12)
    url(r'^login/', login,name="xxx"),
    url(r'^app01/', include('app01.urls'),),
    url(r'^template/', temp_func,),
    url(r'^add/', add,),
    url(r'^query/', query,),
    url(r'^books/', books,),
    url(r'^$', books,),
    url(r'^addbook/', addbook,name='add_book'),
    url(r'^edit/(d+)', editbook,name='edit_book'),
    url(r'^del/(d+)', delbook,name='del_book'),

]


#  url的路径：/books/3与正则匹配 /book/d+

# import re
#
# re.findall("^books_achrive/(d+)/$","books_achrive/2012/12/")

app01/views.py

from django.shortcuts import render,HttpResponse,redirect

# Create your views here.
def timer(request):

    import time
    ctime=time.time()
    #return HttpResponse(ctime)
    return render(request,"timer.html",{"ctime":ctime})

def book_detail(reqeust,id):

    return HttpResponse(id)

def books_achrive(request,year,month):

    return HttpResponse(year+":"+month)

def books_achrive2(request,month,year):

    return HttpResponse(year+":"+month)

def login(request):

    if request.method=="GET":
        print(request.GET)
        print(request.POST)
        print(request.method)
        print(request.path)
        print(request.path_info)
        print(request.body)
        return render(request, "login.html")

    else:

        print(request.GET)
        print(request.POST)
        print(request.method)
        print(request.path)
        print(request.path_info)
        print(request.body)

        user=request.POST.get("user")
        pwd=request.POST.get("pwd")
        if 1:
            return redirect("/app01/timer/")


def temp_func(request):

    l=[11,222,333]
    dic={"name":"yuan","age":23}

    class Person(object):
        def __init__(self,name,age):
            self.name=name
            self.age=age
        def learning(self):
             return "learning"
    alex=Person("alex",45)
    egon=Person("egon",36)
    person_list=[alex,egon]

    import datetime
    now=datetime.datetime.now()
    print(now)

    file_size=234212123123

    content="hello yuan world egon alex"
    s="<a href='http://www.baidu.com'>hello</a>"
    #return render(request,"temp.html",{"l":l,"dic":dic})
    return render(request,"temp.html",locals())


from .models import *
def add(request):
    # obj=Book.objects.create(title="python",price=123,create_time="2012-12-12")
    # print(obj.title)

    obj=Book(title="php",price=123,create_time="2012-12-12")
    obj.save()
    return HttpResponse("123")


def query(request):
    # # (1) all()    QuerySet: [<Book: Book object>, <Book: Book object>]
    # book_list=Book.objects.all()
    # print(book_list)
    #
    # # (2) filter()   QuerySet
    # book_list=Book.objects.filter(price=123,title="python")
    # print(book_list)
    # book = Book.objects.filter(price=123, title="python")[0]
    # print(book)  # model对象
    #
    # # (3) get()  model对象  有且只有一个查询结果才有意义
    # book=Book.objects.get(price=12345)
    # print(book)

    #(4)  order_by  QuerySet
    # book_list=Book.objects.all().order_by("-id")
    # book_list=Book.objects.all().order_by("price")
    # print(book_list)
    # # (5) count
    # c = Book.objects.all().order_by("price").count()
    # print(c)
    # # (6)first() model对象
    # book=Book.objects.all().first()
    #
    # # (7)exists()
    # ret=Book.objects.all().exists()
    # if ret:
    #     print("Ok")
    # (8)values:QuerySet

    # ret=Book.objects.all().values("title","price")
    # print(ret) # <QuerySet [{'title': 'python'}, {'title': 'php'}]>
    # ret=Book.objects.all().values_list("title","price")
    # print(ret)# <QuerySet [('python', Decimal('123.00')), ('php', Decimal('122.00'))]>
    # (9)distinct
    # ret=Book.objects.all().values("price").distinct()
    # print(ret)

    #######################模糊查询#############################
    book_list=Book.objects.filter(title__startswith="py")
    book_list=Book.objects.filter(price__gt=120)
    return HttpResponse("OK")

'''
   temp=[] 
   for obj in Book.objects.all():
       temp.append({
           "title":obj.title
           "price":obj.price
       })
'''


def books(reqeust):

    book_list=Book.objects.all()

    # 一对多查询
    # book_obj=Book.objects.filter(id=6).first()
    # print(book_obj.publish.name)
    # print(book_obj.publish.email)

    # 多对多的查询
    # book_obj = Book.objects.filter(id=6).first()
    # print(book_obj.author.all())

    return render(reqeust,"books.html",locals())


def addbook(request):

    if request.method=="POST":

        title=request.POST.get("title")
        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")
        print("author_id_list",author_id_list)
        # 绑定书籍与出版社的一对多的关系
        obj=Book.objects.create(title=title,price=price,create_time=date,publish_id=publish_id)
        # 绑定书籍与作者的多对多的关系
        # 不可行方案
        # for author_id in author_id_list:
        #     A.objects.create(book_id=obj.pk,author_id=author_id)
        # 可行方案
        # obj.author.add(1,2,3)
        # obj.author.remove(1,2)
        # obj.author.clear()
        obj.authors.add(*author_id_list)
        return redirect("/books/")
    else:
        publish_list=Publish.objects.all()
        author_list=Author.objects.all()
        return render(request,"addbook.html",locals())

def editbook(request,id):
    if request.method == "POST":
        title=request.POST.get("title")
        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")
        # QuerySet才能update
        Book.objects.filter(id=id).update(title=title,price=price,create_time=date,publish_id=publish_id)
        # 先清空与多值的关系,再添加多对多的关系
        Book.objects.get(id=id).authors.clear()
        Book.objects.get(id=id).authors.add(*author_id_list)
        # 等同于            book.authors.set(author_id_list)

        return redirect("/books/")

    publish_list = Publish.objects.all()
    author_list = Author.objects.all()
    edit_book=Book.objects.get(id=id)
    return render(request,"editbook.html",locals())


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

templates/books.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>书籍展示页</title>
    <style>
        .container{
            margin-top: 100px;
        }
    </style>
    <link rel="stylesheet" href="/static/bs/css/bootstrap.css">
</head>
<body>
    <div class="container">
        <div class="row">
            <div class="col-md-6 col-md-offset-3">
                <a href="{% url 'add_book'%}"><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.authors.all %}
                                 {{ author.name }}
                                     {% if not forloop.last %}
                                     ,
                                     {% endif %}
                                 {% endfor %}
                             </td>
                         <td>
                             <a href="{% url 'edit_book' book.pk %}">编辑</a>
                             <a href="{% url 'del_book' book.pk %}">删除</a>
                         </td>
                         </tr>
                         {% endfor %}

                    </tbody>
                </table>
            </div>
        </div>
    </div>


</body>
</html>

templates/editbook.html

<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <title>编辑书籍</title>
    <style>
        .container{
            margin-top: 100px;
        }
    </style>
    <link rel="stylesheet" href="/static/bs/css/bootstrap.css">
</head>
<body>
    <div class="container">
        <div class="row">
            <div class="col-md-6 col-md-offset-3">
                <form action="{% url 'edit_book' id%}" method="post">
                    {% csrf_token %}
                    <p>书籍名称 <input type="text" name="title" value="{{ edit_book.title }}"></p>
                    <p>书籍价格 <input type="text" name="price" value="{{ edit_book.price }}"></p>
                    <p>出版日期 <input type="date" name="date" value="{{ edit_book.create_time|date:"Y-m-d" }}"></p>
                    <p>出版社 <select name="publish_id" id="">
                        {% for publish in publish_list %}
                            {% if edit_book.publish == publish %}
                                <option selected value="{{ publish.id }}">{{ publish.name }}</option>
                            {% else %}
                                <option value="{{ publish.id }}">{{ publish.name }}</option>
                            {% endif %}
                        {% endfor %}

                       </select>
                    </p>

                    <p>作者<select name="author_id_list" id="" multiple >
                        {% for author in author_list %}
                            {% if author in edit_book.authors.all %}
                                <option selected value="{{ author.id }}">{{ author.name }}</option>
                            {% else %}
                                <option value="{{ author.id }}">{{ author.name }}</option>
                            {% endif %}

                        {% endfor %}
                    </select>

                    </p>
                    <input type="submit" class="btn btn-default">
                </form>
            </div>
        </div>
    </div>


</body>
</html>

templates/addbook.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>新增书籍</title>
    <style>
        .container{
            margin-top: 100px;
        }
    </style>
    <link rel="stylesheet" href="/static/bs/css/bootstrap.css">
</head>
<body>
    <div class="container">
        <div class="row">
            <div class="col-md-6 col-md-offset-3">
                <form action="{% url 'add_book'%}" 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="date" name="date"></p>
                    <p>出版社 <select name="publish_id" id="">
                        {% for publish in publish_list %}
                            <option value="{{ publish.pk }}">{{ publish.name }}</option>
                        {% endfor %}

                       </select>
                    </p>

                    <p>作者 <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>