老男孩python全栈就业班第9期第3部分Django基础第63天添加书籍

添加书籍

1.进入目录 mysiteday62/templates，修改文件 book_list.html，新增添加书籍入口

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>书籍列表</title>
</head>
<body>
<a href="/add_book/">添加书籍</a>
<h1>所有的书籍都在这里！</h1>
<table border="1">
    <thead>
        <tr>
            <td>id</td>
            <td>title</td>
            <td>publisher</td>
        </tr>
    </thead>
    <tbody>
    {% for i in all_book %}
        <tr>
            <td>{{ i.id }}</td>
            <td>{{ i.title }}</td>
            <td>{{ i.publisher.name }}</td>
        </tr>
    {% endfor %}
    </tbody>
</table>
</body>
</html>　

2.进入目录 mysiteday62/mysiteday62，修改文件 urls.py，添加 path，新增 add_book 路径

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

from app01 import views

urlpatterns = [
    path('admin/', admin.site.urls),

    # 出版社相关的对应关系
    path('publisher_list/', views.publisher_list),
    path('add_publisher/', views.add_publisher),
    path('delete_publisher/', views.delete_publisher),
    path('edit_publisher/', views.edit_publisher),

    # 书相关的对应关系
    path('book_list/', views.book_list),
    path('add_book/', views.add_book), # 添加书籍

    # 测试
    path('test/', views.test),
]

3.进入目录 mysiteday62/mysiteday62，修改文件 views.py，添加方法 add_book

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，我就取到用户的数据
    if request.method == "POST":
        new_name = request.POST.get("publisher_name")
        if new_name:
            # 通过ORM去数据库新建一条记录
            models.Publisher.objects.create(name=new_name)
            # 引导用户访问出版社列表，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
def delete_publisher(request):

    # 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)
    if del_id:
        # 去数据库删除当前id值的数据
        # 根据id值查找当前数据
        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):
    error_msg = ""
    # 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":
        # 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})

# 添加书籍
def add_book(request):
    if request.method == "POST":
        # {"book_title":"跟金老板学开车", "publisher":7}
        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)
        # 返回书籍列表页
        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})

def test(request):
    print(request.GET)
    print(request.GET.get("id"))
    return HttpResponse('OK')

4.进入目录 mysiteday62/templates，添加文件 add_book.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>添加书籍</title>
</head>
<body>

<h1>添加书籍</h1>
<form action="/add_book/" method="post">
    <p>
        书名:<input type="text" name="book_title">
    </p>
    <p>
        出版社:
        <select name="publisher">
            {% for publisher in publisher_list %}
                <option value="{{ publisher.id }}">{{ publisher.name }}</option>
            {% endfor %}
        </select>
    </p>
    <p>
        <input type="submit" value="提交">
    </p>

</form>

</body>
</html>

5.测试

 

posted on 2019-11-17 05:27  herisson_pan  阅读(16)  评论(0)    收藏  举报

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