from flask import Flask, render_template, request, redirect
from wtforms import Form
from wtforms.fields import core
from wtforms.fields import html5
from wtforms.fields import simple
from wtforms import validators
from wtforms import widgets
#flask 的表单验证相当于django的from表单验证,需要下载wtforms,,然后导入这个类需要继承Form
class RegisterForm(Form):
def validate_pwd_confirm(self, field):
"""
自定义pwd_confirm字段规则，例：与pwd字段是否一致
:param field:
:return:
"""
# 最开始初始化时，self.data中已经有所有的值
print(field.data)
if field.data !="sb":
#raise validators.ValidationError("sb") # 继续后续验证
raise validators.StopValidation("SB") # 不再继续后续验证
# if field.data != self.data['pwd']:
# raise validators.ValidationError("密码不一致") # 继续后续验证
#raise validators.StopValidation("密码不一致") # 不再继续后续验证
name = simple.StringField(
label='用户名',
validators=[
validators.DataRequired()
],
widget=widgets.TextInput(),
render_kw={'class': 'form-control'},
default='tank'
)
pwd = simple.PasswordField(
label='密码',
validators=[
validators.DataRequired(message='密码不能为空.')
],
widget=widgets.PasswordInput(),
render_kw={'class': 'form-control'}
)
pwd_confirm = simple.PasswordField(
label='重复密码',
validators=[
validate_pwd_confirm,
validators.DataRequired(message='重复密码不能为空.'),
#validators.EqualTo('pwd', message="两次密码输入不一致")
],
widget=widgets.PasswordInput(),
render_kw={'class': 'form-control'}
)
email = html5.EmailField(
label='邮箱',
validators=[
validators.DataRequired(message='邮箱不能为空.'),
validators.Email(message='邮箱格式错误')
],
widget=widgets.TextInput(input_type='email'),
render_kw={'class': 'form-control'}
)
gender = core.RadioField(
label='性别',
choices=(
(1, '男'),
(2, '女'),
),
coerce=int # “1” “2”
)
city = core.SelectField(
label='城市',
choices=(
('bj', '北京'),
('sh', '上海'),
)
)
hobby = core.SelectMultipleField(
label='爱好',
choices=(
(1, '篮球'),
(2, '足球'),
),
coerce=int
)
favor = core.SelectMultipleField(
label='喜好',
choices=(
(1, '篮球'),
(2, '足球'),
),
widget=widgets.ListWidget(prefix_label=False),
option_widget=widgets.CheckboxInput(),
coerce=int,
default=[1, 2]
)
def __init__(self, *args, **kwargs):
super(RegisterForm, self).__init__(*args, **kwargs)
self.favor.choices = ((1, '篮球'), (2, '足球'), (3, '羽毛球'))
self.favor.data=[1,]
app = Flask(__name__)
@app.route("/register",methods=["POST","GET"])
def register():
if request.method=="GET":
form = RegisterForm(fromdata=request.form)
#将数据丢给all表单进行验证
return render_template("register.html",form=form)
#前端书写all前端代码
else:
form =RegisterForm(formdata=request.form)
if form.validate():
#验证前端传输的数据是否正常
print("提交数据正确")
else:
print(form.errors)
#打印错误信息
return render_template("register.html",form=form)
#前端代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>用户注册</h1>
<form method="post" novalidate style="padding:0 50px">
{% for field in form %}
<p>{{field.label}}: {{field}} {{field.errors[0] }}</p>
{% endfor %}
<input type="submit" value="提交">
</form>
</body>
</html>