Django的一些小鸡条

django models 设置默认的查询排序方式：

class Meta:
	ordering = ("-create_time")

form 继承models

方法一

from django import forms
from apps.user import UserModel

class User(forms.Form):
	class Meta:
		models = UserModel

方法二

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

def mobile_validate(value):
    mobile_re = re.compile(r'^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$')
    if not mobile_re.match(value):
        raise ValidationError('手机号码格式错误')

def username_validate(value):
    mobile_re = re.compile(r'^[0-9A-Za-z.@\-\_]{2,16}$')
    if not mobile_re.match(value):
        raise ValidationError('用户名格式错误（不能是中文）')


class UserForm(forms.Form):
    """user 表单"""
    userName = forms.CharField(required=True, min_length=2, max_length=60, validators=[username_validate,])
    depart_id = forms.CharField(required=False)
    depart_name = forms.CharField(required=False)
    role = forms.CharField(required=False)
    userPwd = forms.CharField(max_length=20, min_length=6,
        error_messages={'required':'密码不能为空','min_length':'密码长度不小于6',"max_length":'密码长度不能大于12'})
    userEmail = forms.EmailField( required=True, error_messages={'required': '邮箱不能为空.','invalid':"邮箱格式错误"})
    Name = forms.CharField( required=False)
    phone = forms.CharField(required=False, validators=[mobile_validate, ])
        area_level = forms.CharField(validators=[
                                     RegexValidator(r'^[123]$', '请检查级别'),
                                 ]
                                 )
    area_status = forms.CharField(validators=[
                                      RegexValidator(r'^[01]$', '请检查状态'),
                                  ])
    area_order = forms.CharField(validators=[
                                   RegexValidator(r'^[0-9]{1,2}$', '请输入2位数字'),
                               ])

views 装饰器的使用

自定义的两个装饰器

def pre_fun(func):
    def inner(request, *args, **kwargs):
        print(request.path)
        kwargs = {
            "name": "你好",
            "kw": "asd"
        }
        return func(request, *args, **kwargs)
    return inner


def my_decorator(func):
    def wrapper(request, *args, **kwargs):
        print('自定义装饰器被调用了')
        print('请求路径%s' % request.path)
        return func(request, *args, **kwargs)
    return wrapper

方法一

@pre_fun
def index(request, *args, **kwargs):
    print(kwargs)
    return render(request, 'index.html', {'kw': kwargs})

方法二

@method_decorator(pre_fun, name="get")
class Index2View(View):
    def get(self, request, *args, **kwargs):
        return render(request, 'index.html', {'kw': kwargs})

方法三

class Index2View(View):
	@method_decorator(pre_fun)
    def get(self, request, *args, **kwargs):
        return render(request, 'index.html', {'kw': kwargs})

方法四

urlpatterns = [
    path('index', my_decorator(IndexView.as_view()), name='index'),
    path('', index, name='index1'),
    path('index2', Index2View.as_view(), name='index2'),
]

django模板全局变量的使用

第一步：写好全局变量的函数方法：

def global_lang(request):
	“”“
	这里可以做一些用户权限的权限的处理
	request.user
	request.path
	request.session['key']
	”“”
    return {
        'header_json':header_json
    }

第二步：在settings 中进行配置

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates'), ],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
             'django.contrib.messages.context_processors.messages',
                'XXX.XXX.global_lang'
            ],
        },
    },
]

第三步：在HTML中使用全局变量

{% include 'header.html' with header=header_json%}
或者
{{header_json}}