Flask之WTForms -- 2019-08-08 20:39:48

Posted 2022-06-20 gqy02

原文: http://106.13.73.98/__/120/

下载：pip install WTForms

第一步 Flask脚本：

from flask import Flask, request, render_template, views
from wtforms import Form, validators
from wtforms.fields import simple, core

app = Flask(__name__)


# --------------------------------------------------------------------------

class RegForm(Form):
    nickname = simple.StringField(
        label="昵称",
        validators=[
            validators.DataRequired(message="昵称不可为空")
        ],
        render_kw='class': 'my_username'  # 自定义扩展属性
    )

    password = simple.PasswordField(
        label="密码",
        validators=[
            validators.DataRequired(message="密码不可为空"),
            # validators.Length(min=3, max=9, message="密码最小3位，最大9位"),
            validators.Length(min=6, max=6, message="密码必须为6位"),
            # 支持正则的匹配：
            validators.Regexp(regex='\d+', message="密码必须为纯数字"),
        ]
    )

    repassword = simple.PasswordField(
        label="校验密码",
        validators=[
            validators.EqualTo(fieldname='password', message="密码不一致")
            # 这里将获取password属性的值，并与本属性的值做比较，如果不一致则阻拦
        ]
    )

    # 邮箱
    email = simple.StringField(
        label="邮箱",
        validators=[
            validators.Email(message="邮箱格式错误"),
        ]
    )

    # 单选纽扣??
    gender = core.RadioField(
        label="性别",
        coerce=int,
        choices=((1, "男"), (2, "女"), (3, "密")),
        default=1,  # 性别默认为男
    )

    # 多选框
    hobby = core.SelectMultipleField(
        label="爱好",
        coerce=int,
        choices=((1, 'Python'), (2, 'Flask'), (3, 'Django'), (4, 'Java')),
        default=(1, 2, 3)  # 默认选中
    )

    # 提交按钮
    submit = simple.SubmitField(
        label="提交"
    )

# --------------------------------------------------------------------------


class Reg(views.MethodView):

    def get(self):
        rf = RegForm()  # ??
        return render_template('reg.html', rf=rf)

    def post(self):
        # 校验数据
        rf = RegForm(request.form)
        # 判断是否校验成功
        if rf.validate():
            # 数据存放在rf.data中
            userinfo = rf.data
            return 'Registered successfully.'
        return render_template('reg.html', rf=rf)


# 注册CBV的路由，一个CBV可以有多条路由
app.add_url_rule('/reg', view_func=Reg.as_view('reg'))

app.run(debug=True)

第二步 模版文件：

<form method="post">
    % for field in rf %
        <div> field.label  field  field.errors.0 </div>
        <hr>
    % endfor %
</form>

第四步 浏览器：

原文: http://106.13.73.98/__/120/