一、Auth组件默认auth_user表常用操作
#1.配置settings,使django与数据库连接
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'dg74_1',
'USER': 'root',
'PASSWORD': "940828",
'HOST': '127.0.0.1'
}
}
#2.
import pymysql
pymysql.install_as_MySQLdb()
#3.直接进行数据库迁移,这样django就会在数据库中建立出一个auth_user表
#操作auth_user 数据库不区分大小写
from django.contrib.auth.models import User
# 1、创建普通用户
User.objects.create_user(username='Henry',password='123')
# 2、创建超级用户
User.objects.create_superuser(username='root', password='root', email='root@root.com')
# 3、获取第一个用户
user = User.objects.first()
# 4、修改密码
user.set_password('000')
user.save()
# 5、校验密码
res = user.check_password('000')
print(res) 校验成功:True 校验失败:False
二、Auth组件常用功能
# 1、校验用户账号及密码，校验成功返回user对象
from django.contrib.auth import authenticate
user = authenticate(username=usr, password=pwd)
# 2、记录登录状态
#注册用户到request对象中，注册成功可以request.user访问当前登录用户（会形成session记录）
from django.contrib.auth import login
login(request, user) # 注册authenticate成功的用户(当前登录的用户)
# 3、注销当前注册的user (用户注销)
from django.contrib.auth import logout
logout(request)
# 4、校验用户登录状态
# 视图函数中使用
if request.user.is_authenticated(): pass
# 模板语言中使用
{% if request.user.is_authenticated %}
{% else %}
{% endif %}
# 5、校验登录状态的装饰器
from django.contrib.auth.decorators import login_required
@login_required(login_url='/user_login/')
def user_home(request):
return render(request, 'user.html', locals())
后台
from django.shortcuts import render,redirect
from django.contrib.auth import login,logout,authenticate
from django.contrib.auth.decorators import login_required
def index(request):
return render(request,'index.html')
def user_login(request):
if request.method == 'GET':
return render(request,'login.html')
if request.method == 'POST':
#在请求url中通过next取出回跳的页面路径,因为使用?拼接所以用get取值,没有值返回主页
back_url = request.GET.get('next','/')
usr = request.POST.get('usr',None)
pwd = request.POST.get('pwd',None)
#用前台传入的账户密码进行登录校验
user = authenticate(username=usr,password=pwd)
if user:
#记录登录状态
login(request,user)
return redirect(back_url)
def user_logout(request):
logout(request)
return redirect('/')
#装饰器的页面返回key是next:/user_login/?next=/user_order/
@login_required(login_url='/user_login/') #没有登录返回登录界面,登录成功又跳转回该页面
def user_order(request):
return render(request,'order.html',locals())
@login_required(login_url='/user_login/')
def user_home(request):
return render(request,'user.html',locals())
前台
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>主页</title>
</head>
<body>
<h1>主页</h1>
<p>
{% if request.user.is_authenticated %}
<a href="/user_home/">{{ request.user.username }}</a>
|
<a href="/user_logout/">注销</a>
{% else %}
<a href="/user_login/">登录</a>
{% endif %}
</p>
<hr>
<a href="/user_order/">订单详情</a>
</body>
</html>
//{% if request.user.is_authenticated %} 检验用户登录状态
//request.user.username 固定的取法,取得登录的用户名
三、自定义auth模块的user表,将auth_user表替换为app_user表
# app/models.py
from django.contrib.auth.models import AbstractUser
class User(AbstractUser):
# 增加自定义字段
info = models.TextField(null=True)
# settings.py配置,auth模块默认采用的是app应用下的自定义user表
AUTH_USER_MODEL = 'app.User'
#数据库迁移后auth_user表不再创建由app_user表替换
四、Form完成表单校验 （自定义错误信息）
'''
1. 校验的字段属性名要与校验的form表单中元素的name值进行匹配
2. 校验字段的参数required
默认为True，代表数据必须传入该校验值
如果设置为False，校验数据中可以不包含该校验值(可以为空),但如果输入了该字段就会对其进行校验
3. error_messages自定义校验失败的错误信息
'''
'''
from django import forms
class CheckForm(forms.Form):
usr = forms.CharField(min_length=3, max_length=10)
pwd = forms.CharField(
min_length=3,
max_length=10,
error_messages={
"min_length": "最少3", # 某个校验规则对应的中文提示的错误信息
"max_length": "最多10",
'required': "必填项" # 除了自定义校验规则，还可以明确默认校验规则的中文提示错误信息
}
)
def register(request):
check_form = CheckForm(request.POST)
if check_form.is_valid():
print("校验成功")
print(check_form.cleaned_data)
else:
print("校验失败")
print(check_form.cleaned_data) # 如果部分成功,仍然可以获得部分成功的数据
print(check_form.errors) # 部分失败的信息
'''
五、局部钩子：在系统提供的校验结束后，在对具体的字段进行自定义二次校验
class CheckForm(forms.Form):
usr = forms.CharField(...)
# ...
# 局部钩子
def clean_usr(self):
cleaned_usr = self.cleaned_data.get('usr', None)
# 自定义校验规则
import re
if re.match('^[0-9]', cleaned_usr): # 通过正则匹配不能以数字开头
from django.core.exceptions import ValidationError
raise ValidationError('不能以数字开头') # 抛ValidationError信息就会被添加到self.errors中
return cleaned_usr
六、全局钩子：在系统提供的校验结束后，在对所有的字段进行自定义二次校验
class CheckForm(forms.Form):
# ...
# 全局钩子
def clean(self):
cleaned_pwd = self.cleaned_data.get('pwd', None)
cleaned_re_pwd = self.cleaned_data.get('re_pwd', None)
if cleaned_pwd != cleaned_re_pwd:
from django.core.exceptions import ValidationError
raise ValidationError('两次密码不一致') # 抛ValidationError信息就会被添加到self.errors中
return self.cleaned_data
后台
from django.shortcuts import render,redirect
from django import forms
class CheckForm(forms.Form):
usr = forms.CharField(min_length=3,max_length=10,
error_messages={
'required':'必须填',
'min_length':'最少3',
'max_length':'最多10'
})
pwd = forms.CharField(min_length=3,max_length=10,
error_messages={
'required':'必须填',
'min_length':'最少3',
'max_length':'最多10'
})
re_pwd = forms.CharField(min_length=3,max_length=10,
error_messages={
'required':'必须填',
'min_length':'最少3',
'max_length':'最多10'
})
email = forms.EmailField(
error_messages={
'invalid':'email格式不正确',
'required':'必填项'
}
)
# 局部钩子：对usr进行局部钩子的校验，该方法会在usr属性校验通过后，系统调用该方法继续校验,是一个回调函数
def clean_usr(self):
cleaned_usr = self.cleaned_data.get('usr', None) # type: str
# 通过正则匹配不能以数字开头
import re
if re.match('^[0-9]', cleaned_usr):
from django.core.exceptions import ValidationError
raise ValidationError('不能以数字开头')
return cleaned_usr #返回局部钩子校验的数据
# 全局钩子：代表校验类中的所有属性校验通过后，系统调用该方法继续校验
def clean(self):
cleaned_pwd = self.cleaned_data.get('pwd', None)
cleaned_re_pwd = self.cleaned_data.get('re_pwd', None)
if cleaned_pwd != cleaned_re_pwd:
from django.core.exceptions import ValidationError
raise ValidationError('两次密码不一致') #抛出异常,必须接受,否则报错
return self.cleaned_data #全部返回
def register(request):
if request.method == 'GET':
return render(request,'register.html')
if request.method == 'POST':
check_form = CheckForm(request.POST)
if check_form.is_valid():
print('校验成功')
print(check_form.cleaned_data)
else:
print('校验失败')
print(check_form.cleaned_data)
print(check_form.errors)
return redirect('/')
前台
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>注册</title>
</head>
<body>
<form action="" method="post" novalidate>
<p>
<label for="usr">账号：</label>
<input type="text" name="usr" id="usr">
</p>
<p>
<label for="pwd">密码：</label>
<input type="password" name="pwd" id="pwd">
</p>
<p>
<label for="re_pwd">确认：</label>
<input type="password" name="re_pwd" id="re_pwd">
</p>
<p>
<label for="email">邮箱：</label>
<input type="email" name="email" id="email">
</p>
<input type="submit" value="注册">
</form>
</body>
</html>
七、模板渲染
class CheckForm(forms.Form):
# 校验需求：账号不能以数字开头
usr = forms.CharField(min_length=3, max_length=10, label="账号：",
error_messages={
'required': "必填项",
'min_length': "最少3",
'max_length': "最多10"
})
pwd = forms.CharField(min_length=3, max_length=10, label="密码：",
error_messages={
'required': "必填项",
'min_length': "最少3",
'max_length': "最多10"
},
widget=forms.PasswordInput(attrs={
'class': 'pwd',
'placeholder': '请输入密码'
})
)
re_pwd = forms.CharField(min_length=3, max_length=10, label="确认：",
error_messages={
'required': "必填项",
'min_length': "最少3",
'max_length': "最多10"
},
widget=forms.PasswordInput)
email = forms.EmailField(label="邮箱：",
error_messages={
'invalid': "格式不正确",
'required': "必填项"
}
)
# 局部钩子：对usr进行局部钩子的校验，该方法会在usr属性校验通过后，系统调用该方法继续校验
def clean_usr(self):
cleaned_usr = self.cleaned_data.get('usr', None) # type: str
# 通过正则匹配不能以数字开头
import re
if re.match('^[0-9]', cleaned_usr):
from django.core.exceptions import ValidationError
raise ValidationError('不能以数字开头')
return cleaned_usr
# 全局钩子：代表校验类中的所有属性校验通过后，系统调用该方法继续校验
def clean(self):
cleaned_pwd = self.cleaned_data.get('pwd', None)
cleaned_re_pwd = self.cleaned_data.get('re_pwd', None)
if cleaned_pwd != cleaned_re_pwd:
from django.core.exceptions import ValidationError
raise ValidationError('两次密码不一致')
return self.cleaned_data
def register(request):
if request.method == "GET":
check_form = CheckForm()
if request.method == "POST":
check_form = CheckForm(request.POST)
if check_form.is_valid():
return HttpResponse('注册成功')
else:
print(check_form.errors.as_data)
all_error = check_form.errors.get('__all__')
return render(request, 'register.html', locals())
渲染方法1
<form action="" method="post" novalidate>
<p>
<label for="id_usr">账号：</label>
{{ check_form.usr }}
</p>
<p>
<label for="id_pwd">密码：</label>
{{ check_form.pwd }}
</p>
<p>
<label for="id_re_pwd">确认：</label>
{{ check_form.re_pwd }}
</p>
<p>
<label for="id_email">邮箱：</label>
{{ check_form.email }}
</p>
<input type="submit" value="注册">
</form>
//命名规范 id_ 这样点击输入框前的名字也可以选定输入框
渲染方法2
<form action="" method="post" novalidate>
{% for ele in check_form %}
<p>
<label for="">{{ ele.label }}</label>
{{ ele }}
<span style="color: red;">{{ ele.errors.0 }}</span>
{% if ele == check_form.re_pwd %}
<span style="color: red;">{{ all_error.0 }}</span>
{% endif %}
</p>
{% endfor %}
<input type="submit" value="注册">
</form>
渲染方式3
<form action="" method="post" novalidate>
{{ check_form.as_p }}
<input type="submit" value="注册">
</form>
<hr>
渲染方式了解
<table>
{{ check_form.as_table }}
</table>
<ul>
{{ check_form.as_ul }}
</ul>
