flask 之cbv ,flash闪现,Flask_Session,WTForms - MoudelForm

1.CBV :
 from flask import views
 
 class LoginView(views.MethodView):
  def get(self):
   return
   
  def post(self):
   return
   
 
 app.add_url_rule("/login",endpoint=None,view_func=LoginView.as_view("login"))
 
2.flash:
 from flask import flash,get_flash_messages
 
 flash("","tag")
 get_flash_messages("tag")
 

3.Flask-Session
 from flask_session import Session
 from flask import session
 
 app.config["SESSION_TYPE"] = "redis"
 app.config["SESSION_REDIS"] = Redis("127.0.0.1",6379,db=7)
 Session(app)
 
 session["user"] = "123"
 session.get("user")
 

4.WTForms - MoudelForm
 from wtfroms.fields import simple,core
 from wtfroms import Form,validators
 
 class LoginForm(Form):
  username = simple.StringFields(
   label = "" #看源码 __init__
  )
  
 
 lf = LoginForm()
 render_template("html",lf=lf)
 
 {{ lf.uername }}
 {{ lf.uername.label }}
 {{ lf.uername.errors.0 }}
 
 lf = LoginForm(request.form)
 
 if not lf.validata():
  render_template("html",lf=lf)
 
 lf.data.get("username")
 

 

**************************************************************************************************************************************

 

from flask import Flask,request,render_templatefrom flask import viewsfrom wtforms import Form #类似 form表单from wtforms.fields import simple,corefrom wtforms import validators #验证器

app=Flask(__name__)#登录页面认证class LoginForm(Form):    username=simple.StringField(        label='用户名',        validators=[            validators.DataRequired(message='不能为空'),#直接把错误写入            validators.Length(min=3,max=5,message='不能小于3位，不能大于5位')        ],        render_kw={'class':'my_username'}, #相等于自定义的类,属性    )

    password=simple.PasswordField(        label='密码',        validators=[           validators.DataRequired(message='不能为空'),            validators.length(min=6,max=6,message='密码必须为6位'),            validators.Regexp(regex='\d+',message='密码必须为数字'),        ],        render_kw={'class':'my_password'}    )

#注册页面认证class RegForm(Form):    username=simple.StringField(        label='密码',        validators=[            validators.DataRequired(message='不能为空'),            validators.Length(min=3,max=5,message='')        ],        render_kw={'class':'my_username'}    )    nickname=simple.StringField(        label='昵称',        validators=[            validators.DataRequired(message='不能为空')],        render_kw={'class':'my_nickname'}    )

    password=simple.PasswordField(        label='密码',        validators=[            validators.DataRequired(message='不能为空'),            validators.Length(min=6,max=6,message='密码必须为6位'),            validators.Regexp(regex='\d+',message='密码必须为数字')        ],        render_kw={'class':'my_password'}    )

    repassword=simple.PasswordField(        label='确认密码',        validators=[ #EqualTo 等于    与字段匹配            validators.EqualTo(fieldname='password',message='两次不一致')        ],        render_kw={'class':'my_password'}    )

    email=simple.StringField(        label='邮箱',        validators=[            validators.Email(message='格式不正确')        ],        render_kw={'class':'myemail'}    )

    #上面用simple  下面用core    gender=core.RadioField(        label='性别',        coerce=int,  #类型为int        choices=(            (1,'女'),            (2,'男')        ),        default=1  #默认为1    )

    hobby=core.SelectMultipleField(        label='爱好',        coerce=int,        choices=(            (1,'小姐姐'),            (2,'小萝莉'),            (3,'小哥哥'),            (4,'正太'),            (5,'小阿姨'),            (6,'小大叔'),        ),        default=(1,2,5)    )

    submit=simple.SubmitField(        label='提交'    )

#登录验证class LoginClass(views.MethodView):    def get(self):        froms=LoginForm()        return render_template('login.html',froms=froms)

    def post(self):        froms=LoginForm(request.form)        if froms.validate(): #django 是is_valid()            return '110'        else:            return render_template('login.html',froms=froms)

app.add_url_rule('/login',view_func=LoginClass.as_view('login'))

#注册

class RegClass(views.MethodView):

    def get(self):        froms=RegForm()        return render_template('reg.html',froms=froms)

    def post(self):        froms=RegForm(request.form)        if froms.validate():            return '120'        else:            return render_template('reg.html',froms=froms)app.add_url_rule('/reg',view_func=RegClass.as_view('reg'))

if __name__ == '__main__':    app.run(debug=True)