Python 当我使用炼金术时,如何设置wtforms炼金术的会话?
我在init_app()的应用程序中使用flask sqlalchemy和init sqlalchemy(),如下所示:Python 当我使用炼金术时,如何设置wtforms炼金术的会话?,python,flask,flask-sqlalchemy,flask-wtforms,Python,Flask,Flask Sqlalchemy,Flask Wtforms,我在init_app()的应用程序中使用flask sqlalchemy和init sqlalchemy(),如下所示: in config file : SQLALCHEMY_DATABASE_URI = 'sqlite:///example.db' --------------------- in extension file : from flask.ext.sqlalchemy import SQLAlchemy db = SQLAlchemy() ------------
in config file :
SQLALCHEMY_DATABASE_URI = 'sqlite:///example.db'
---------------------
in extension file :
from flask.ext.sqlalchemy import SQLAlchemy
db = SQLAlchemy()
---------------------
in application file:
#in my application file that generate my app
from ----- import db
db.init_app(app)
from wtforms_alchemy import ModelForm
class UserForm(ModelForm):
class Meta:
model = User
我的模型是:
from -------- import db
class User(db.Model):
__tablename__ = 'user'
id = db.Column(db.Integer, autoincrement=True , primary_key=True)
username = db.Column(db.String(50),unique=True)
password = db.Column(db.String(50))
email = db.Column(db.String(50),unique=True)
def __repr__(self):
return '<User %r>' % self.username
我有一个错误:
File "/usr/local/lib/python2.7/dist-packages/wtforms_components/validators.py", line 220, in _check_for_session
raise Exception('Could not obtain SQLAlchemy session.')
Exception: Could not obtain SQLAlchemy session.
如何修复此错误?来自:
为了使WTForms Alchemy与Flask WTF协同工作,您需要以下代码片段:
from flask.ext.wtf import Form
from wtforms_alchemy import model_form_factory
ModelForm = model_form_factory(Form)
您可以像以前一样使用ModelForm:
class UserForm(ModelForm):
class Meta:
model = User
这确实依赖于用户
拥有查询
对象;e、 g.您的用户
模型必须来自db.model
。如果没有,则需要在表单上定义get\u session
方法:
谢谢你的回答,但我的问题是sqlalchemy会话。@sdnaghdi:WTForms Alchemy
Unique
验证器所做的就是查找User.query
;如果不存在,则需要添加get\u session()
方法。这很可能意味着你没有为你的用户使用db.Model
,特别是thanx,帮我个忙。
class UserForm(ModelForm):
class Meta:
model = User
def get_session(self):
return db.session