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from contextlib import contextmanager
from flask import current_app
from sqlalchemy import create_engine, Column, Integer, String, DateTime, Text, Index, ForeignKey
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker, relation, backref
from sqlalchemy.orm.exc import NoResultFound
engine = create_engine(current_app.config['DB_PATH'])
Base = declarative_base(bind = engine)
class Paste(Base):
__tablename__ = 'paste'
id = Column(Integer, primary_key = True)
hash = Column(String, unique = True, index = True)
nick = Column(String)
date = Column(DateTime, nullable = False)
syntax = Column(String)
title = Column(String)
text = Column(Text, nullable = False)
ip = Column(String)
def __init__(self, hash, nick, date, syntax, title, text, ip=None):
self.nick = nick
self.hash = hash
self.date = date
self.syntax = syntax
self.title = title
self.text = text
self.ip = ip
def __repr__(self):
return '<Paste(%d, "%s", "%s", "%s", "%s")>' % (self.id, self.hash, self.nick, self.date.ctime(), self.title)
class Cache(Base):
__tablename__ = 'cache'
id = Column(Integer, primary_key = True)
paste_hash = Column(String, ForeignKey('paste.hash'), index = True)
paste = relation(Paste, primaryjoin = paste_hash == Paste.hash, lazy = False)
syntax_name = Column(String)
text = Column(Text, nullable = False)
def __init__(self, hash, syntax_name, text):
self.paste_hash = hash
self.syntax_name = syntax_name
self.text = text
def __repr__(self):
return '<Cache(%d, "%s")>' % (self.id, self.paste_hash)
Base.metadata.create_all()
Session = sessionmaker(bind = engine, autoflush = True, autocommit = False)
@contextmanager
def session_scope():
session = Session()
try:
session.expire_on_commit = False
yield session
session.commit()
except:
session.rollback()
raise
finally:
session.close()
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