坑请注意

如selectField字段提示: choices not valid

area = SelectField(coerce=int)

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField
from wtforms.validators import DataRequired, Length, Email, EqualToclass UserRegisterForm(FlaskForm):username = StringField('用户名', [DataRequired('用户名必填！'), Length(min=6, max=20, message='用户名必须介于6-20字符！')])password = PasswordField('密码', [DataRequired('密码必填！'), Length(min=6, max=20, message='密码必须介于6-20字符！')])confirm = PasswordField('重复密码', [DataRequired('重复密码必填！'), EqualTo('password', message='两次密码输入不一致！')])email = StringField('邮箱', [DataRequired('邮箱必填！'), Email('邮箱格式不正确！')])

view.py

class RegView(MethodView):def get(self):form = UserRegisterForm(request.form)return render_template('register.html', form=form)def post(self):form = UserRegisterForm(request.form)if User.query.filter_by(username=form.username.data).first():flash("当前用户名已经注册！")return render_template('register.html', form=form)elif User.query.filter_by(email=form.email.data).first():flash("当前邮箱已经注册！")return render_template('register.html', form=form)else:form.validate_on_submit()user = User(form.username.data,form.password.data,form.email.data,)user.save()return redirect(url_for('.login'))

{% macro renden_field(field) %}{% if field.errors %}{% for error in field.errors %}<li style="font-size: medium">{{ error }}</li>{% endfor %}{% endif %}
{% endmacro %}{% macro messages(get_flashed_messages) %}{% with messages = get_flashed_messages() %}{% if messages %}{% for message in messages %}<div class="alert alert-danger"><a href="#" class="close" data-dismiss="alert">×</a>{{ message }}</div>{% endfor %}{% endif %}{% endwith %}
{% endmacro %}

form.html

{% from 'helper.html' import renden_field,messages %}<form action="" class="form-horizontal" method="post">{{ form.csrf_token }}{{ messages(get_flashed_messages) }}<div class="panel-body"><div class="form-group">{{ form.username.label(class="col-lg-2 col-sm-2 control-label") }}<div class="col-md-6">{{ form.username(class='from-control') }}{{ renden_field(form.username) }}</div></div><div class="form-group">{{ form.password.label(class="col-lg-2 col-sm-2 control-label") }}<div class="col-md-6">{{ form.password(class='from-control') }}{{ renden_field(form.password) }}</div></div>