1.自定义验证器
1.1 行内验证器
from wtforms import IntegerField, SubmitField
from wtforms.validators import ValidationError
class ForttwoForm(FlaskForm):
answer = IntegerField('The Number')
submit = SubmitField()
def validate_answer(form, field):
if field.data != 42:
raise ValidationError('Must be 42.')
当表单类中包含以'validate_字段属性名'形式命名的方法时,在验证字段数据时会同时调用这个方法来验证对应的字段
1.2 全局验证器
# 简单demo
from wtrorms.validators import ValidationError
def is_42(form, field):
if field.data != 42:
raise ValidationError('Must be 42')
class ForttwoForm(FlaskForm):
answer = IntegerField('The Number', validators=[is_42])
submit = SubmitField()
这里我们无法传入消息
我们改进如下
from wtrorms.validators import ValidationError
def is_42(message=None):
if message is None:
message = 'Must be 42'
def _is_42(form, field):
if field.data != 42:
raise ValidationError(message)
return _is_42
class ForttwoForm(FlaskForm):
answer = IntegerField('The Number', validators=[is_42])
submit = SubmitField()
