# 1 flask中得闪现存放数据的地方，一旦取了，数据就没了-实现跨请求间传递数据
# 2 django中有没有类似的东西？message 消息框架# 3 基本使用1 设置：flash('欢迎你、欢迎来到澳门赌场！！！')2 取：get_flashed_messages()# 4 根据标签设置和取值flash('超时错误',category="x1")get_flashed_messages(category_filter=['x1'])
from flask import Flask
from flask. views import MethodView
from flask import Flask, request, render_template, redirect, flash, get_flashed_messages
app = Flask( __name__) app. debug = True
app. secret_key = 'asdfasdf'
@app. route ( '/login' , endpoint= 'login' , methods= [ 'GET' , 'POST' ] )
def login ( ) : if request. method == 'GET' : return render_template( 'login.html' ) else : username = request. form. get( 'username' ) password = request. form. get( 'password' ) if username == 'jing' and password == '123' : flash( '欢迎你：132456' ) flash( 'ss' ) flash( 'ee' ) return redirect( '/' ) else : flash( '用户名密码错误' ) return redirect( '/' ) @app. route ( '/' )
def index ( ) : return render_template( 'index.html' ) if __name__ == '__main__' : app. run( )
<! DOCTYPE html > < htmllang = " en" > < head> < metacharset = " UTF-8" > < linkrel = " stylesheet" href = " https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" > < title> </ title> </ head> < body> < divclass = " container col-xl-10 col-xxl-8 px-4 py-5" > < divclass = " row align-items-center g-lg-5 py-5" > < divclass = " col-lg-7 text-center text-lg-start" > < h1class = " display-4 fw-bold lh-1 mb-3" > </ h1> < pclass = " col-lg-10 fs-4" > </ p> </ div> < divclass = " col-md-10 mx-auto col-lg-5" > < formclass = " p-4 p-md-5 border rounded-3 bg-light" method = " post" > < divclass = " form-floating mb-3" > < inputtype = " text" class = " form-control" id = " floatingInput" placeholder = " name@example.com" name = " username" > < labelfor = " floatingInput" > </ label> </ div> < divclass = " form-floating mb-3" > < inputtype = " password" class = " form-control" id = " floatingPassword" placeholder = " Password" name = " password" > < labelfor = " floatingPassword" > </ label> </ div> < divclass = " checkbox mb-3" > < label> < inputtype = " checkbox" value = " remember-me" > </ label> </ div> < buttonclass = " w-100 btn btn-lg btn-primary" type = " submit" > </ button> < hrclass = " my-4" > < smallclass = " text-muted" > </ small> </ form> </ div> </ div> </ div> </ body> </ html> <! DOCTYPE html > < htmllang = " en" > < head> < metacharset = " UTF-8" > < title> </ title> </ head> < body> < h1> </ h1> </ body> </ html>
INSTALLED_APPS = [ . . . 'django.contrib.messages' , . . .
]
MIDDLEWARE = [ . . . 'django.contrib.messages.middleware.MessageMiddleware' , . . .
]
TEMPLATES = [ { 'BACKEND' : 'django.template.backends.django.DjangoTemplates' , 'DIRS' : [ ] , 'APP_DIRS' : True , 'OPTIONS' : { 'context_processors' : [ . . . 'django.contrib.messages.context_processors.messages' , ] , } }
]
MESSAGE_STORAGE = "django.contrib.messages.storage.session.SessionStorage"
from django. contrib import messages
def concel_order ( request) : messages. add_message( request, messages. SUCCESS, "删除成功1" ) messages. add_message( request, messages. SUCCESS, "删除成功2" ) return redirect( "/order/control/" )
def control_order ( request) : if request. method == "GET" : from django. contrib. messages. api import get_messagesm1 = get_messages( request) print ( m1)
< div> { % for obj in messages % } < ul> { { obj. message } } < / ul> { % endfor % }
< / div>
- 我们使用：index 视图函数- - - 》内部又调用了add- - 》add( ) 又调用了aa( ) - - > 如果有参数，需要依次传入- 通过g对象，我们可以把参数放到g中，以后直接从g中取即可- 我们一般不直接把数据放到request对象中- 因为可能会污染数据
from flask import Flask, g, requestapp = Flask( __name__) app. debug = True
app. secret_key = 'asydiasdugiausdg' @app. before_request
def before ( ) : if 'index' in request. full_path: g. name = '你谈是' request. name= g. nameelse : g. name = '其他' request. name = '其他'
def add ( ) : print ( g. name) print ( request. name) b = g. name + "nb" return b@app. route ( '/index' )
def index ( ) : print ( g. name) res = add( ) return 'hello' + res@app. route ( '/home' )
def home ( ) : print ( g. name) return 'home' if __name__ == '__main__' : app. run( )
- flask_lantu- views- models. py- __init__. py- lan. py
from flask import Flask, Blueprint
order_blue = Blueprint( 'user' , __name__)
app = Flask( __name__) @order_blue. before_request
def before ( ) : print ( '来了' ) @order_blue. route ( '/order' )
def order ( ) : return 'order-order-order'
@order_blue. route ( '/' )
def index ( ) : return 'hello world' if __name__ == '__main__' : app. run( )
__init__.pyfrom flask import Flaskapp = Flask(__name__, template_folder='../templates')from .views.models import order_blueapp.register_blueprint(order_blue)
from flask import Flask, Blueprintapp = Flask( __name__, template_folder= '../templates' ) from views. models import order_blueapp. register_blueprint( order_blue) if __name__ == '__main__' : app. run( ) 
