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models.py
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models.py
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from sqlalchemy import Column, Integer, VARCHAR, INTEGER
from sqlalchemy.engine import create_engine
from sqlalchemy.ext.associationproxy import association_proxy
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship, backref, scoped_session
from sqlalchemy.orm.session import sessionmaker
from sqlalchemy.schema import ForeignKey
import dbutils
engine = create_engine('mysql://bfc1ffabdb36c3:65da212b@us-cdbr-east-02.cleardb.com/heroku_1cec684f35035ce', echo=True, pool_recycle=3600)#recycle connection every hour to prevent overnight disconnect)
Base = declarative_base(bind=engine)
sm = sessionmaker(bind=engine, autoflush=True, autocommit=False, expire_on_commit=False)
Session = scoped_session(sm)
class User(Base):
__tablename__ = 'user'
#column definitions
id = Column(u'id', INTEGER(), primary_key=True, nullable=False)
username = Column(u'username', VARCHAR(length=32), nullable=False)
# item_completions = relationship('ItemCompletion', backref='user') #one to many
completed_items = association_proxy('completed_items', 'item')
class ItemCompletion(Base):
__tablename__ = 'itemcompletion'
user_id = Column(Integer, ForeignKey('user.id'), primary_key=True)
item_id = Column(Integer, ForeignKey('item.id'), primary_key=True)
file_path = Column(VARCHAR(255))
user = relationship(User, backref=backref("completed_items", cascade="all, delete-orphan"))
item = relationship("Item")
def __init__(self, user_id, item_id, file_path=None):
self.user_id = user_id
self.item_id = item_id
self.file_path = file_path
def __repr__(self):
return '<ItemCompletion %d @ %d>' % (self.user_id, self.item_id)
class Item(Base):
__tablename__ = 'item'
id = Column(Integer, primary_key=True)
item_id = Column(Integer)
description = Column(VARCHAR(length=255))
def __init__(self, item_id, description=''):
self.item_id = item_id
self.description = description
def __repr__(self):
return '<Item %d>' % self.item_id
def serialize(self):
return {'Item number': self.item_id,
'Description': self.description
}
Base.metadata.create_all(engine)