forms.py

#coding:utf-8

from flask.ext.wtf import Form
from flask.ext.pagedown.fields import PageDownField
from wtforms import StringField, BooleanField, TextAreaField, PasswordField, SubmitField
from wtforms.validators import DataRequired, Length, EqualTo
from app.models import User, Post

class LoginForm(Form):
    nickname = StringField('nickname', validators=[Length(min=1, max=20, message=u'昵称长度为1-20个字符')])
    password = PasswordField('password', validators=[Length(min=4, max=20, message=u'密码长度为4-20个字符')])
    remember_me = BooleanField('remember_me', default=True)

    def validate_nickname(form, field):
        user = User.query.filter_by(nickname=field.data).first()
        if user == None:
            field.errors.append(u'这个用户名不在我的大脑里')
            return False
        return True

    def validate_password(form, field):
        user = User.query.filter_by(nickname=form.nickname.data).first()
        if user == None:
            return False
        if user.password != field.data:
            field.errors.append(u'密码错误')
            return False
        return True

class RegisterForm(Form):
    nickname = StringField('nickname', validators=[Length(min=1, max=20, message=u'昵称长度为1-20个字符')])
    password = PasswordField('password', validators=[Length(min=4, max=20, message=u'密码长度为4-20个字符'), EqualTo('confirm', message=u'两次输入必须相同')])
    confirm = PasswordField('Repeat Password')

    def validate_nickname(form, field):
        user = User.query.filter_by(nickname=field.data).first()
        if user is not None:
            field.errors.append(u'这个昵称已经被使用了')
            return False
        return True

class EditForm(Form):
    about_me = TextAreaField('about_me', validators=[Length(min=0, max=140)])

class PostForm(Form):
    post = TextAreaField('post', validators=[Length(min=1, max=140)])

class SearchForm(Form):
    search = StringField('search', validators=[DataRequired()])

class EssayForm(Form):
    essay = PageDownField('essay', validators=[DataRequired()])
    title = StringField('title', validators=[Length(min=1, max=20)])
    submit = SubmitField(u'提交')