• 进击的Python【第二十一章】


    s14day21

    上节内容回顾:
    1、请求周期
    url> 路由 > 函数或类 > 返回字符串或者模板语言?

    Form表单提交:
    提交 -> url > 函数或类中的方法
    - ....
    HttpResponse('....')
    render(request,'index.html')
    redirect('/index/')
    用户 < < 返回字符串
    (当接受到redirect时)自动发起另外一个请求
    --> url .....

    Ajax:
    $.ajax({
    url: '/index/',
    data: {'k': 'v', 'list': [1,2,3,4], 'k3': JSON.stringfy({'k1': 'v'}))}, $(form对象).serilize()
    type: 'POST',
    dataType: 'JSON':
    traditional: true,
    success:function(d){
    location.reload() # 刷新
    location.href = "某个地址" # 跳转
    }
    })
    提交 -> url -> 函数或类中的方法
    HttpResponse('{}')
    render(request, 'index.html', {'name': 'v1'})
    <h1>{{ name }}</h1> -->
    <h1>v1</h1>

    XXXXXXX redirect...
    用户 <<<<< 字符串


    2、路由系统URL
    a. /index/ -> 函数或类
    b. /index/(d+) -> 函数或类
    c. /index/(?P<nid>d+) -> 函数或类
    d. /index/(?P<nid>d+) name='root' -> 函数或类
    reverse()
    {% url 'root' 1%}
    e. /crm/ include('app01.urls') -> 路由分发

    f. 默认值
    url(r'^index/', views.index, {'name': 'root'}),

    def index(request,name):
    print(name)
    return HttpResponse('OK')

    g. 命名空间

    /admin/ include('app01.urls',namespace='m1')
    /crm/ include('app01.urls',namespace='m1')

    app01.urls
    /index/ name = 'n1'


    reverser('m1:n1')

    3、
    def func(request):
    request.POST
    request.GET
    request.FILES
    request.getlist
    request.method
    request.path_info

    return render,HttpResponse,redirect

    4、
    render(request, 'index.html')
    # for
    # if
    # 索引. keys values items all

    5、
    class User(models.Model):
    username = models.CharField(max_length=32)
    email = models.EmailField()

    有验证功能
    Django Admin
    无验证功能:
    User.objects.create(username='root',email='asdfasdfasdfasdf')
    User.objects.filter(id=1).update(email='666')



    class UserType(models.Model):
    name = models.CharField(max_length=32)


    class User(models.Model):
    username = models.CharField(max_length=32)
    email = models.EmailField()
    user_type = models.ForeignKey("UserType")

    user_list = User.objects.all()
    for obj user_list:
    obj.username,obj.email,obj.user_type_id,obj.user_type.name,obj.user_type.id

    user = User.objects.get(id=1)
    user.

    User.objects.all().values("username","user_type__name",)



    class UserType(models.Model):
    name = models.CharField(max_length=32)


    class User(models.Model):
    username = models.CharField(max_length=32)
    email = models.EmailField()
    user_type = models.ForeignKey("UserType")
    m = models.ManyToMany('UserGroup')


    class UserGroup(models.Model):
    name = ....


    obj = User.objects.get(id=1)
    obj.m.add(2)
    obj.m.add(2,3)
    obj.m.add(*[1,2,3])

    obj.m.remove(...)

    obj.m.clear()


    obj.m.set([1,2,3,4,5])

    # 多个组,UserGroup对象
    obj.m.all()
    obj.m.filter(name='CTO')



    知识点:
    URL
    - 两个
    Views
    - 请求的其他信息
    from django.core.handlers.wsgi import WSGIRequest
    request.environ
    request.environ['HTTP_USER_AGENT']
    - 装饰器
    FBV:
    def auth(func):
    def inner(reqeust,*args,**kwargs):
    v = reqeust.COOKIES.get('username111')
    if not v:
    return redirect('/login/')
    return func(reqeust, *args,**kwargs)
    return inner

    CBV:
    from django import views
    from django.utils.decorators import method_decorator

    @method_decorator(auth,name='dispatch')
    class Order(views.View):

    # @method_decorator(auth)
    # def dispatch(self, request, *args, **kwargs):
    # return super(Order,self).dispatch(request, *args, **kwargs)

    # @method_decorator(auth)
    def get(self,reqeust):
    v = reqeust.COOKIES.get('username111')
    return render(reqeust,'index.html',{'current_user': v})

    def post(self,reqeust):
    v = reqeust.COOKIES.get('username111')
    return render(reqeust,'index.html',{'current_user': v})
    Templates
    - 母版...html
    extends
    include
    - 自定义函数
    simple_tag
    a. app下创建templatetags目录
    b. 任意xxoo.py文件
    c. 创建template对象 register
    d.
    @register.simple_tag
    def func(a1,a2,a3....)
    return "asdfasd"
    e. settings中注册APP
    f. 顶部 {% load xxoo %}
    g. {% 函数名 arg1 arg2 %}
    缺点:
    不能作为if条件
    优点:
    参数任意
    filter
    a. app下创建templatetags目录
    b. 任意xxoo.py文件
    c. 创建template对象 register
    d.
    @register.filter
    def func(a1,a2)
    return "asdfasd"
    e. settings中注册APP
    f. 顶部 {% load xxoo %}
    g. {{ 参数1|函数名:"参数二,参数三" }} {{ 参数1|函数名:数字 }}
    缺点:
    最多两个参数,不能加空格
    优点:
    能作为if条件

    分页(自定义的分页)

    XSS:
    {{ page_str|safe }}

    mark_safe(page_str)

    cookie
    客户端浏览器上的一个文件
    {"user": 'dachengzi'}


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  • 原文地址:https://www.cnblogs.com/yunweiqiang/p/6254318.html
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