from django.shortcuts import HttpResponse, render, redirect
from app01 import models
# Create your views here.
# 展示出版社列表
def publisher_list(request):
# 去数据库查出所有的出版社,填充到HTML中,给用户返回
ret = models.Publisher.objects.all().order_by("id")
return render(request, "publisher_list.html", {"publisher_list": ret})
# 添加新的出版社
def add_publisher(request):
error_msg = ""
# 如果是POST请求,我就取到用户填写的数据
if request.method == "POST":
new_name = request.POST.get("publisher_name", None)
if new_name:
# 通过ORM去数据库里新建一条记录
models.Publisher.objects.create(name=new_name)
# 引导用户访问出版社列表页,查看是否添加成功 --> 跳转
return redirect("/publisher_list/")
else:
error_msg = "出版社名字不能为空!"
# 用户第一次来,我给他返回一个用来填写的HTML页面
return render(request, "add_publisher.html", {"error": error_msg})
# 删除出版社的函数
def delete_publisher(request):
print(request.GET)
print("=" * 120)
# 删除指定的数据
# 1. 从GET请求的参数里面拿到将要删除的数据的ID值
del_id = request.GET.get("id", None) # 字典取值,娶不到默认为None
# 如果能取到id值
if del_id:
# 去数据库删除当前id值的数据
# 根据id值查找到数据
del_obj = models.Publisher.objects.get(id=del_id)
# 删除
del_obj.delete()
# 返回删除后的页面,跳转到出版社的列表页,查看删除是否成功
return redirect("/publisher_list/")
else:
return HttpResponse("要删除的数据不存在!")
# 编辑出版社
def edit_publisher(request):
# 用户修改完出版社的名字,点击提交按钮,给我发来新的出版社名字
if request.method == "POST":
print(request.POST)
# 取新出版社名字
edit_id = request.POST.get("id")
new_name = request.POST.get("publisher_name")
# 更新出版社
# 根据id取到编辑的是哪个出版社
edit_publisher = models.Publisher.objects.get(id=edit_id)
edit_publisher.name = new_name
edit_publisher.save() # 把修改提交到数据库
# 跳转出版社列表页,查看是否修改成功
return redirect("/publisher_list/")
# 从GET请求的URL中取到id参数
edit_id = request.GET.get("id")
if edit_id:
# 获取到当前编辑的出版社对象
publisher_obj = models.Publisher.objects.get(id=edit_id)
return render(request, "edit_publisher.html", {"publisher": publisher_obj})
else:
return HttpResponse("编辑的出版社不存在!")
# 展示书的列表
def book_list(request):
# 去数据库中查询所有的书籍
all_book = models.Book.objects.all()
# 在HTML页面完成字符串替换(渲染数据)
return render(request, "book_list.html", {"all_book": all_book})
# 删除书籍
def delete_book(request):
# 从URL里面获取要删除的书籍的id值
delete_id = request.GET.get("id") # 从URL里面取数据
# 去删除数据库中删除指定id的数据
models.Book.objects.get(id=delete_id).delete()
# 返回书籍列表页面, 查看是否删除成功
return redirect("/book_list/")
# 添加书籍
def add_book(request):
if request.method == "POST":
print(request.POST)
print("=" * 120)
# {"book_title": "跟金老板学开车", "publisher": 9}
new_title = request.POST.get("book_title")
new_publisher_id = request.POST.get("publisher")
# 创建新书对象,自动提交
models.Book.objects.create(title=new_title, publisher_id=new_publisher_id)
# 用出版社对象创建
# publisher_obj = models.Publisher.objects.get(id=new_publisher_id)
# models.Book.objects.create(title=new_title, publisher=publisher_obj)
# 返回到书籍列表页
return redirect("/book_list/")
# 取到所有的出版社
ret = models.Publisher.objects.all()
return render(request, "add_book.html", {"publisher_list": ret})
# 编辑书籍
def edit_book(request):
if request.method == "POST":
# 从提交的数据里面取,书名和书关联的出版社
edit_id = request.POST.get("id")
new_title = request.POST.get("book_title")
new_publisher_id = request.POST.get("publisher")
# 更新
edit_book_obj = models.Book.objects.get(id=edit_id)
edit_book_obj.title = new_title # 更新书名
edit_book_obj.publisher_id = new_publisher_id # 更新书籍关联的出版社
# 将修改提交到数据库
edit_book_obj.save()
# 返回书籍列表页面,查看是否编辑成功
return redirect("/book_list/")
# 返回一个页面,让用户编辑书籍信息
# 取到编辑的书的id值
edit_id = request.GET.get("id")
# 根据id去数据库中把具体的书籍对象拿到
edit_book_obj = models.Book.objects.get(id=edit_id)
print(edit_book_obj.id)
print(edit_book_obj.title)
print(edit_book_obj.publisher) # 取到当前书籍对象关联的出版社对象
print(edit_book_obj.publisher_id) # 取到当前书籍对象关联的出版社的id值
ret = models.Publisher.objects.all()
return render(
request,
"edit_book.html",
{"publisher_list": ret, "book_obj": edit_book_obj}
)
# 作者列表
def author_list(request):
# author_obj = models.Author.objects.get(id=1)
# print(author_obj.book.all())
# print("=" * 120)
# 查询所有的作者
all_author = models.Author.objects.all()
return render(request, "author_list.html", {"author_list": all_author})
# 添加作者
def add_author(request):
if request.method == "POST":
print("in post...")
# 取到提交的数据
new_author_name = request.POST.get("author_name")
# post提交的数据是多个值的时候一定会要用getlist,如多选的checkbox和多选的select
books = request.POST.getlist("books")
# 创建作者
new_author_obj = models.Author.objects.create(name=new_author_name)
# 把新作者和书籍建立对应关系,自动提交
new_author_obj.book.set(books)
# 跳转到作者列表页面,查看是否添加成功!
return redirect("/author_list/")
# 查询所有的书籍
ret = models.Book.objects.all()
return render(request, "add_author.html", {"book_list": ret})
# 删除作者
def delete_author(request):
# 从URL里面取到要删除的作者id
delete_id = request.GET.get("id")
#根据ID值取到要删除的作者对象,直接删除
# 1. 去作者表把作者删了
# 2. 去作者和书的关联表,把对应的关联记录删除了
models.Author.objects.get(id=delete_id).delete()
# 返回作者列表页面
return redirect("/author_list/")
# 编辑作者
def edit_author(request):
# 如果编辑完提交数据过来
if request.method == "POST":
# 拿到提交过来的编辑后的数据
edit_author_id = request.POST.get("author_id")
new_author_name = request.POST.get("author_name")
# 拿到编辑后作者关联的书籍信息
new_books = request.POST.getlist("books")
# 根据ID找到当前编辑的作者对象
edit_author_obj = models.Author.objects.get(id=edit_author_id)
# 更新作者的名字
edit_author_obj.name = new_author_name
# 更新作者关联的书的对应关系
edit_author_obj.book.set(new_books)
# 将修改提交到数据库
edit_author_obj.save()
# 返回作者列表页,查看是否编辑成功
return redirect("/author_list/")
# 从URL里面取要编辑的作者的id信息
edit_id = request.GET.get("id")
# 找到要编辑的作者对象
edit_author_obj = models.Author.objects.get(id=edit_id)
# 查询所有的书籍对象
ret = models.Book.objects.all()
return render(request, "edit_author.html", {"book_list": ret, "author": edit_author_obj})
def test(request):
print(request.GET)
print(request.GET.get("id"))
return HttpResponse("OK")
# 书复习代码
def book_test(request):
# 查询所有的书籍
# book_list = models.Book.objects.all()
# # print(book_list)
# for i in book_list:
# print(i)
# print(i.title)
# print(i.publisher)
# print(i.publisher.name)
# print(i.publisher.addr)
# print("=" * 20)
# 增加新书
# new_book_obj = models.Book.objects.create(
# title="新书的名字",
# publisher_id=10
# )
# 增加新书
publisher_obj = models.Publisher.objects.get(id=10)
new_book_obj = models.Book.objects.create(
title="新书的名字2",
publisher=publisher_obj
)
print(new_book_obj)
return HttpResponse("o98k")
