我无法导入Flask-WTF TextField和BooleanField

Question

我正在使用virtualenv来建立一个新项目.我在脚本文件夹中使用virtualenv pip安装了很多东西,如下所示:

flask\scripts\pip install Flask-WTF

我没有在全局python文件夹中安装其他软件包.我的代码看起来像这样:

# Importing TextField and BooleanField is not working...
from flask.ext.wtf import Form, TextField, BooleanField
from flask.ext.wtf import Required


class LoginForm(Form):
    openid = TextField('openid', validators=[Required()])
    remember_me = BooleanField('remember_me', default=False)

和其他软件包一样,sqlalchemy也只安装在虚拟环境中.

我得到的错误是:

(flask) D:\Development\grading>flask\Scripts\python.exe restserver.py Traceback (most recent call last):
File "restserver.py", line 1, in <module> from app import app
File "D:\Development\grading\app\__init__.py", line 12, in <module> from forms import LoginForm
File "D:\Development\grading\app\forms.py", line 1, in <module> from flask.ext.wtf import Form, TextField, BooleanField
File "D:\Development\grading\flask\lib\site-packages\flask\exthook.py", line 87, in load_module
raise ImportError('No module named %s' % fullname) ImportError: No module named flask.ext.wtf.TextField

找到表单但不是TextField和BooleanField.这里有什么问题？

更新 我只看了一些Flask-WTF代码,发现了这个:

from flask.ext.wtf import Form
from wtforms.fields import TextField, BooleanField
from wtforms.validators import Required

我使用的是旧版本的示例吗？

Answer 1

从版本0.9.0开始,Flask-WTF不会从wtforms导入任何内容,您需要从wtforms导入字段.

资源

您需要从中导入它们wtforms(请注意,根据docsimport语句已更改):

from flask_wtf import Form

from wtforms import TextField, BooleanField
from wtforms.validators import Required

Answer 2

我遇到了同样的问题并在安装 WTForms 2.3.3 后解决

pip install WTForms==2.3.3

from flask_wtf import FlaskForm
from flask_wtf import Form
from wtforms import TextField, BooleanField, TextAreaField