6.1-图书增删改查页面(代码片段)

from django.urls import path,re_path

from book import views

urlpatterns = [
    # path(\'login/\',views.login, name = \'login\'),                 # FBV
    path(\'login/\',views.LoginView.as_view(), name = \'login\'),     # CBV
    # path(\'register/\',views.register, name = \'register\'),
    path(\'register/\',views.RegisterView.as_view(), name = \'register\'),
    path(\'exist_user/\',views.exist_user),
    path(\'logout/\',views.logout),

    path(\'book_list/\',views.book_list, name = \'book_list\'),
    # re_path(r\'^book_list/(\\d+)/(publisher)\',views.book_list),
    re_path(r\'^book_list/(?P<field_id>\\d+)/(?P<field_type>publisher)\',views.book_list),  # 有名分组
    # re_path(r\'^book_list/(\\d+)/(author)\',views.book_list),
    re_path(r\'^book_list/(?P<field_id>\\d+)/(?P<field_type>author)\',views.book_list),     # 有名分组

    path(\'del_book/\',views.del_book, name = \'del_book\'),
    re_path(r\'^del_book/(\\d+)/(publisher)\',views.del_book),
    re_path(r\'^del_book/(\\d+)/(author)\',views.del_book),

    path(\'add_book/\',views.add_book,name=\'add_book\'),
    re_path(r\'^add_book/(\\d+)/(publisher)\',views.add_book),
    re_path(r\'^add_book/(\\d+)/(author)\',views.add_book),

    re_path(r\'^update_book/(?P<book_id>\\d+)/(?P<field_id>\\d+)/(?P<field_type>publisher)\',views.update_book),
    re_path(r\'^update_book/(?P<book_id>\\d+)/(?P<field_id>\\d+)/(?P<field_type>author)\',views.update_book),
    re_path(r\'^update_book/(?P<book_id>\\d+)\',views.update_book),
    # 这个得放到下面 否则会截走 上面两个 因为第一个也是正则

    path(\'publisher_list/\',views.publisher_list, name = \'publisher_list\'),
    path(\'del_publisher/\',views.del_publisher, name = \'del_publisher\'),
    path(\'add_publisher/\',views.add_publisher, name = \'add_publisher\'),
    re_path(r\'^update_publisher/(\\d+)\',views.update_publisher),

    path(\'author_list/\',views.author_list, name = \'author_list\'),
    path(\'del_author/\',views.del_author, name = \'del_author\'),
    path(\'add_author/\',views.add_author, name = \'add_author\'),
    re_path(r\'^update_author/(\\d+)\',views.update_author),

]

from django.db import models
from django.utils import timezone


# 出版社类
class Publisher(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=32)

    def __str__(self):
        return self.name


# 书类
class Book(models.Model):
    id = models.AutoField(primary_key=True)
    title = models.CharField(max_length=32)
    price = models.DecimalField(max_digits=8,decimal_places=2)
    publish_date = models.DateTimeField(default=timezone.now())
    # 书只能关联一个出版社, 外键通常建在多的那一边
    publisher = models.ForeignKey(to=\'Publisher\',on_delete=models.CASCADE)

    def __str__(self):
        return self.title


# 作者类
class Author(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=16)
    # 多对多， 建在哪边都可以
    books = models.ManyToManyField(to=\'Book\',related_name=\'authors\')

    detail = models.OneToOneField(to=\'AuthorDetail\',null=True,on_delete=models.CASCADE)

    def __str__(self):
        return self.name


# 作者详情
class AuthorDetail(models.Model):
    age = models.IntegerField()
    addr = models.TextField()


# 登录注册的用户信息
class UserInfo(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=16)
    pwd = models.CharField(max_length=32)

# -*- coding:utf-8 -*-
from django import forms
from django.forms import widgets
from django.core.exceptions import ValidationError

from book import models

widget_input = widgets.TextInput(attrs=\'class\':\'form-control\')
widg_num = widgets.NumberInput(attrs=\'class\':\'form-control\')
widget_password = widgets.PasswordInput(attrs=\'class\':\'form-control\')


class PublisherForm(forms.Form):
    name = forms.CharField(
        label=\'出版社名称\',
        min_length=4,
        max_length=32,
        error_messages=
            \'required\':\'不能为空\',
            \'min_length\':\'不能小于4位\',
        ,
        widget=widget_input
    )

    def clean_name(self):
        val = self.cleaned_data.get(\'name\')
        if not val.isdigit():
            return val
        else:
            raise ValidationError(\'名称不能是纯数字\')


class AuthorForm(forms.Form):
    name = forms.CharField(
        label=\'姓名\',
        min_length=2,
        max_length=16,
        error_messages=
            \'required\':\'不能为空\',
            \'min_length\':\'不能小于2位\',
        ,
        # widget = widget_input
    )
    age = forms.IntegerField(
        label=\'年龄\',
        min_value=1,
        max_value=150,
        error_messages=
            \'required\':\'不能为空\',
            \'invalid\':\'格式错误\',
            \'min_value\':\'不能小于1岁\',
            \'max_value\':\'不能大于100岁\',
        ,
        # widget = widget_input
    )
    addr = forms.CharField(
        label=\'地址\',
        min_length=2,
        max_length=32,
        error_messages=
            \'required\':\'不能为空\',
            \'min_length\':\'不能小于2位\'
        ,
        # widget=widget_input,

    )

    # 给每一个key 添加样式
    def __init__(self,*args,**kwargs):
        super(AuthorForm, self).__init__(*args,**kwargs)
        for field in iter(self.fields):
            self.fields[field].widget.attrs.update(
                \'class\':\'form-control\'
            )

    def clean_name(self):
        val = self.cleaned_data.get(\'name\')
        if not val.isdigit():
            return val
        else:
            raise ValidationError(\'姓名不能是纯数字\')

    def clean_addr(self):
        val = self.cleaned_data.get(\'addr\')
        if not val.isdigit():
            return val
        else:
            raise ValidationError(\'地址不能是纯数字\')


class BookForm(forms.Form):
    title = forms.CharField(
        label=\'书名称\',
        max_length=32,
        error_messages=
            \'required\':\'不能为空\',
        ,
        widget=widget_input
    )
    price = forms.DecimalField(
        label=\'价格\',
        max_digits=8,
        decimal_places=2,
        error_messages=
            \'required\':\'不能为空\',
            \'max_digits\':\'不能超过8位\',
        ,
        widget=widg_num
    )

    # 最后选择了自己去添加 select 。。。。。。

    # publisher = forms.ChoiceField(
    #     label=\'出版社\',
    #     # choices=((1,\'篮球\'),(2,\'足球\')),
    #     choices=models.Publisher.objects.all().values_list(\'id\',\'name\'),
    #     initial=1,
    #     widget=widgets.Select(attrs=\'class\':\'form-control\')
    # )
    #
    # # 可以不用重启 刷新就有新的数据
    # def __init__(self,*args,**kwargs):
    #     super(BookForm, self).__init__(*args,**kwargs)
    #     self.fields[\'publisher\'].widget.choices = models.Publisher.objects.all().values_list(\'id\',\'name\')

    def clean_title(self):
        val = self.cleaned_data.get(\'title\')
        if not val.isdigit():
            return val
        else:
            raise ValidationError(\'名称不能为纯数字\')

    def clean_price(self):
        val = self.cleaned_data.get(\'price\')
        if val < 0:
            raise ValidationError(\'价格不能为负数\')
        else:
            return val


class LoginForm(forms.Form):
    username = forms.CharField(
        label=\'用户名\',
        min_length=2,
        max_length=16,
        error_messages=
            \'required\':\'不能为空\',
            \'min_length\':\'不能小于2位\'
        ,
        widget=widget_input
    )
    password = forms.CharField(
        label=\'密码\',
        min_length=6,
        max_length=16,
        error_messages=
            \'required\':\'不能为空\',
            \'min_length\':\'不能小于6位\'
        ,
        widget=widget_password

    )

    def clean_username(self):
        val = self.cleaned_data.get(\'username\')
        if not val.isdigit():
            return val
        else:
            raise ValidationError(\'用户名不能是纯数字\')