FLASK 的Session和MoudelForm插件

falsk是小而精的框架，但是热度高，

所有很多爱好者提供了很多扩展插件

功能强大，美而不足的就是兼容稳定性有时候不太好，不过大部分还是很可以的

Flask-Session

flask内置session式写在浏览器上的，感觉和其他框架不太一样，

现在学习一个写在后台的session

现在我想写在redis中，怎么操作呢

先要下载包 ： flask-session

from flask import Flask, render_template

from flask import views  # 导入视图模块

from flask import session

from flask_session import Session  # 导入Session类

from redis import Redis

app = Flask(__name__, static_folder="static")

# # # # # # 配置 # # # # # # # #

red = Redis("127.0.0.1", , db=)  # 实例化Redis连接

app.config["SESSION_TYPE"] = "redis"  # key大写，value小写！！！

app.config["SESSION_REDIS"] = red  # 指定连接是Redis实例，让session执行写入redis的方法

Session(app)  # 添加配置

# FBV

@app.route('/')

def index():

    session["key"] = "strong_key"

    print(session)  # <RedisSession {'_permanent': True, 'key': 'strong_key'}>

    # 浏览器观察key是   session  ：8a1561f9-800c-4f03-be69-2ea336c39d39

    # redis中 通过"session:8a1561f9-800c-4f03-be69-2ea336c39d39"获取到value是

    # "\x80\x03}q\x00(X\n\x00\x00\x00_permanentq\x01\x88X\x03\x00\x00\x00keyq\x02X\n\x00\x00\x00strong_keyq\x03u."

    return "this's index"

# CBV

class LoginClass(views.MethodView):

    def get(self):

        return render_template("login.html")

    def post(self):

        return "ok"

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

app.run(debug=True, host="127.0.0.1", port="")

seesion_py文件

源码大概意思

需要配置的

WTForms - MoudelForm

后端写页面render到前端的组件

学过django应该了解form组件

flask中的第三方库WTForms功能是类似的

开始写一个简单的登录注册吧。。

没有拆分，直接写在一个app上了

from flask import Flask, render_template, request

from flask import views  # 导入视图模块

from wtforms.fields import simple, core

from wtforms import Form

from wtforms import validators

app = Flask(__name__, static_folder="static")

# # # # # # # # # # # # # # # # # # # #

# # # # # #   MoudelFrom组件  # # # # #

# # # # # # # # # # # # # # # # # # # #

class LoginForm(Form):

    username = simple.StringField(

        label="用户名",

        validators=[

            validators.DataRequired(message="不能为空"),

            validators.Length(min=, max=, message="不能小于3位，不能大于5位")

        ],

        render_kw={"class": "my_username"}

    )

    password = simple.PasswordField(

        label="密码",

        validators=[

            validators.DataRequired(message="不能为空"),

            validators.length(min=, max=, message="密码必须是6位"),

            validators.Regexp(regex="\d+", message="密码必须是数字")

        ],

        render_kw={"class": "my_pwd"}

    )

# 注册页面的form

class RegForm(Form):

    username = simple.StringField(

        label="用户名",

        validators=[

            validators.DataRequired(message="不能为空"),

            validators.Length(min=, max=, message="不能小于3位,不能大于6位")

        ],

        # render_kw={""}  不写了默认class：这个字段（username）

    )

    password = simple.PasswordField(

        label="密码",

        validators=[

            validators.DataRequired(message="不能为空"),

            validators.Length(min=, message="密码不能小于6"),

            validators.Regexp(regex="\d+", message="密码必须位数字"),

        ],

        render_kw={"class": "reg_pwd"}

    )

    re_password = simple.PasswordField(

        label="重复密码",

        validators=[

            validators.EqualTo(fieldname="password", message="两次密码不一致")

        ]

    )

    email = simple.StringField(

        label="邮箱",

        validators=[

            validators.Email(message="格式不正确")

        ],

    )

    # 性别    单选

    gender = core.RadioField(

        label="性别",

        coerce=int,

        choices=(

            (, "男"), (, "女"), (, "保密")

        ),

        default=

    )

    # 爱好   多选

    hobby = core.SelectMultipleField(

        label="爱好",

        coerce=int,

        choices=(

            (, "小姐姐"),

            (, "小萝莉"),

            (, "小哥哥"),

            (, "小正太"),

            (, "阿姨"),

            (, "大叔"),

        ),

        default=(, )

    )

    submit = simple.SubmitField(

        label="提交"

    )

# FBV

@app.route('/')

def index():

    return "this's index"

# CBV

class LoginClass(views.MethodView):

    def get(self):

        login_form = LoginForm()

        return render_template("login.html", lf=login_form)

    def post(self):

        login_form = LoginForm(request.form)

        if login_form.validate():

            return ""

        else:

            return render_template("login.html", lf=login_form)

class RegClass(views.MethodView):

    def get(self):

        rf = RegForm()

        return render_template("reg.html", rf=rf)

    def post(self):

        rf = RegForm(request.form)

        if rf.validate():

            return ""

        else:

            return render_template("reg.html", rf=rf)

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

app.add_url_rule("/reg",view_func=RegClass.as_view("reg"))

app.run(debug=True, host="127.0.0.1", port="")

app.py文件

html页面

<!DOCTYPE html>

<html lang="zh-CN">

<head>

    <meta http-equiv="content-Type" charset="UTF-8">

    <meta http-equiv="x-ua-compatible" content="IE=edge">

    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>Title</title>

</head>

<body>

<form action="" method="post" novalidate>

    {{ lf.username.label }}{{ lf.username }}{{ lf.username.errors. }}

    <p>{{ lf.password.label }}{{ lf.password }}{{ lf.password.errors. }}</p>

    <input type="submit" value="提交">

    </form>

</body>

</html>

<head>

    <meta http-equiv="content-Type" charset="UTF-8">

    <meta http-equiv="x-ua-compatible" content="IE=edge">

    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>Title</title>

</head>

<body>

<form action="" method="post">

    {% for field in rf %}

        <p>{{ field.label }}{{ field }}{{ field.errors. }}</p>

    {% endfor %}

</form>

</body>

</html>

reg.html

巴特西

FLASK 的Session和MoudelForm插件

Flask-Session

WTForms - MoudelForm

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