1.登陆
class LoginForm(Form):
name = simple.StringField(
validators=[
validators.DataRequired(message='用户名不能为空.'),
# validators.Length(min=6, max=18, message='用户名长度必须大于%(min)d且小于%(max)d')
],
widget=widgets.TextInput(),
render_kw={'placeholder':'请输入用户名'}
)
pwd = simple.PasswordField(
validators=[
validators.DataRequired(message='密码不能为空.'),
# validators.Length(min=8, message='用户名长度必须大于%(min)d'),
# validators.Regexp(regex="^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[$@$!%*?&])[A-Za-zd$@$!%*?&]{8,}",
# message='密码至少8个字符,至少1个大写字母,1个小写字母,1个数字和1个特殊字符')
],
render_kw={'placeholder':'请输入密码'}
)
@app.route('/login',methods=['GET','POST'])
def login():
if request.method == "GET":
form = LoginForm()
# print(form.name,type(form.name)) # form.name是StringField()对象, StringField().__str__
# print(form.pwd,type(form.pwd)) # form.pwd是PasswordField()对象,PasswordField().__str__
return render_template('login.html',form=form)
form = LoginForm(formdata=request.form)
if form.validate():
print(form.data)
return redirect('https://www.luffycity.com/home')
else:
# print(form.errors)
return render_template('login.html', form=form)
2.注册
class RegisterForm(Form):
name = simple.StringField(
label='用户名',
validators=[
validators.DataRequired()
],
widget=widgets.TextInput(),
render_kw={'class': 'form-control'},
default='alex'
)
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=[
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 # int("1")
)
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, ]
)
@app.route('/register', methods=['GET', 'POST'])
def register():
if request.method == 'GET':
form = RegisterForm()
return render_template('register.html', form=form)
form = RegisterForm(formdata=request.form)
if form.validate():
print(form.data)
return redirect('https://www.luffycity.com/home')
return render_template('register.html', form=form)
3.从数据库取出数据
import helper
class UserForm(Form):
city = core.SelectField(
label='城市',
choices=(),
coerce=int
)
name = simple.StringField(label='姓名')
def __init__(self,*args,**kwargs):
super(UserForm,self).__init__(*args,**kwargs)
self.city.choices=helper.fetch_all('select id,name from tb1',[],type=None)
@app.route('/user')
def user():
if request.method == "GET":
#form = UserForm(data={'name':'alex','city':3})
form = UserForm()
return render_template('user.html',form=form)
前端模版如何使用wtforms
<form method="post" novalidate>
{% for field in form %}
<p>{{field.label}}: {{field}} {{field.errors[0]}}</p>
{% endfor %}
<input type="submit" value="提交">
</form>
钩子函数的使用
使用方法"validate_字段名称",与django的form模块的钩子函数的"clean_函数名"相同
def validate_name(self, field):
"""
自定义name字段规则
:param field:
:return:
"""
# 最开始初始化时,self.data中已经有所有的值
print('钩子函数获取的值',field.data)
if not field.data.startswith('old'):
raise validators.ValidationError("用户名必须以old开头") # 继续后续验证
# raise validators.StopValidation("用户名必须以old开头") # 不再继续后续验证