新しいflaskアプリをflask-sqlalchemyとflask-restful with Python 3.4を使用して作成しています。ユーザーモデルを次のように定義しました。
from mytvpy import db
from sqlalchemy.ext.declarative import declared_attr
class BaseModel(db.Model):
__abstract__ = True
id = db.Column(db.Integer, primary_key=True)
created = db.Column(db.TIMESTAMP, server_default=db.func.now())
last_updated = db.Column(db.TIMESTAMP, server_default=db.func.now(), onupdate=db.func.current_timestamp())
@declared_attr
def __tablename__(cls):
return cls.__name__
class User(BaseModel):
username = db.Column(db.String(255), unique=True)
password = db.Column(db.String(255))
email = db.Column(db.String(255), unique=True)
def __init__(self, username, password, email):
super(User, self).__init__()
self.username = username
self.password = password
self.email = email
Ipythonでクエリを実行しようとすると、機能します。
In [15]: from mytvpy.models.base import User
In [16]: User.query.all()
Out[16]: [<mytvpy.models.base.User at 0x7fac65b1c6a0>]
しかし、エンドポイントからヒットしようとすると、次のようになります。
class User(Resource):
def get(self, user):
return User.query.filter(User.username==user).scalar()
それはクラップスです:
Traceback (most recent call last):
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask_restful/__init__.py", line 270, in error_router
return original_handler(e)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/_compat.py", line 32, in reraise
raise value.with_traceback(tb)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask_restful/__init__.py", line 270, in error_router
return original_handler(e)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/_compat.py", line 32, in reraise
raise value.with_traceback(tb)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask_restful/__init__.py", line 471, in wrapper
resp = resource(*args, **kwargs)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask/views.py", line 84, in view
return self.dispatch_request(*args, **kwargs)
File "/home/rich/anaconda/envs/mytv/lib/python3.5/site-packages/flask_restful/__init__.py", line 581, in dispatch_request
resp = meth(*args, **kwargs)
File "/home/rich/prj/mytv/mytvpy/blueprints/base.py", line 12, in get
return User.query.filter(User.username==user).scalar()
AttributeError: type object 'User' has no attribute 'query'
User
という名前の2つのクラスがあります。1つはBaseModel
を拡張し、もう1つはResource
を拡張します。後者は前者を隠しています。
モデルのインポート/参照方法を変更すると、コードが機能するはずです。
from mytvpy.models import base
base.User.query.all()