Python-сообщество

from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Table, Column, Integer, String, MetaData, ForeignKey, create_engine
from sqlalchemy.orm import sessionmaker

Base = declarative_base()
class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    fullname = Column(String)
    password = Column(String)
 
    def __init__(self, name, fullname, password):
        self.name = name
        self.fullname = fullname
        self.password = password
    def __repr__(self):
        return "<User('%s','%s', '%s')>" % (self.name, self.fullname, self.password)

users_table = User.__table__
print(users_table)
metadata = Base.metadata
print(metadata)


engine = create_engine('sqlite:///file.db', echo=True)

Session = sessionmaker(bind=engine)
session = Session()

vasiaUser = User('vasia', 'Vasiliy Pypkin', 'vasia2000')
romaUser = User('roman', 'Roman Romanov', 'roma3000')
session.add(vasiaUser)
session.add(romaUser)
session.commit()

ourUser = session.query(User).filter_by(name="roman").first()

C:\Python32\python.exe C:/Users/Егор/Desktop/prof_db/play.py
users
MetaData(bind=None)
2011-10-24 22:15:01,125 INFO sqlalchemy.engine.base.Engine BEGIN (implicit)
2011-10-24 22:15:01,127 INFO sqlalchemy.engine.base.Engine INSERT INTO users (name, fullname, password) VALUES (?, ?, ?)
2011-10-24 22:15:01,127 INFO sqlalchemy.engine.base.Engine ('vasia', 'Vasiliy Pypkin', 'vasia2000')
2011-10-24 22:15:01,127 INFO sqlalchemy.engine.base.Engine ROLLBACK
Traceback (most recent call last):
  File "C:\Python32\lib\site-packages\sqlalchemy\engine\base.py", line 1633, in _execute_context
    context)
  File "C:\Python32\lib\site-packages\sqlalchemy\engine\default.py", line 332, in do_execute
    cursor.execute(statement, parameters)
sqlite3.OperationalError: no such table: users

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:/Users/Егор/Desktop/prof_db/play.py", line 35, in <module>
    session.commit()
  File "C:\Python32\lib\site-packages\sqlalchemy\orm\session.py", line 645, in commit
    self.transaction.commit()
  File "C:\Python32\lib\site-packages\sqlalchemy\orm\session.py", line 313, in commit
    self._prepare_impl()
  File "C:\Python32\lib\site-packages\sqlalchemy\orm\session.py", line 297, in _prepare_impl
    self.session.flush()
  File "C:\Python32\lib\site-packages\sqlalchemy\orm\session.py", line 1547, in flush
    self._flush(objects)
  File "C:\Python32\lib\site-packages\sqlalchemy\orm\session.py", line 1616, in _flush
    flush_context.execute()
  File "C:\Python32\lib\site-packages\sqlalchemy\orm\unitofwork.py", line 328, in execute
    rec.execute(self)
  File "C:\Python32\lib\site-packages\sqlalchemy\orm\unitofwork.py", line 472, in execute
    uow
  File "C:\Python32\lib\site-packages\sqlalchemy\orm\mapper.py", line 2220, in _save_obj
    execute(statement, params)
  File "C:\Python32\lib\site-packages\sqlalchemy\engine\base.py", line 1399, in execute
    params)
  File "C:\Python32\lib\site-packages\sqlalchemy\engine\base.py", line 1532, in _execute_clauseelement
    compiled_sql, distilled_params
  File "C:\Python32\lib\site-packages\sqlalchemy\engine\base.py", line 1640, in _execute_context
    context)
  File "C:\Python32\lib\site-packages\sqlalchemy\engine\base.py", line 1777, in _handle_dbapi_exception
    from e
sqlalchemy.exc.OperationalError: (OperationalError) no such table: users 'INSERT INTO users (name, fullname, password) VALUES (?, ?, ?)' ('vasia', 'Vasiliy Pypkin', 'vasia2000')

Process finished with exit code 1

>>> ourUser = session.query(User).filter_by(name="vasia").first()
<User('vasia','Vasiliy Pypkin', 'vasia2000')>

C:\Python32\python.exe C:/Users/Егор/Desktop/prof_db/simple.py
2011-10-31 13:26:21,128 INFO sqlalchemy.engine.base.Engine PRAGMA table_info("users")
2011-10-31 13:26:21,128 INFO sqlalchemy.engine.base.Engine ()
2011-10-31 13:26:21,130 INFO sqlalchemy.engine.base.Engine 
CREATE TABLE users (
	id INTEGER NOT NULL, 
	name VARCHAR, 
	fullname VARCHAR, 
	password VARCHAR, 
	PRIMARY KEY (id)
)


2011-10-31 13:26:21,130 INFO sqlalchemy.engine.base.Engine ()
2011-10-31 13:26:21,130 INFO sqlalchemy.engine.base.Engine COMMIT
2011-10-31 13:26:21,131 INFO sqlalchemy.engine.base.Engine BEGIN (implicit)
2011-10-31 13:26:21,138 INFO sqlalchemy.engine.base.Engine INSERT INTO users (name, fullname, password) VALUES (?, ?, ?)
2011-10-31 13:26:21,138 INFO sqlalchemy.engine.base.Engine ('vasia', 'Vasiliy Pypkin', 'vasia2000')
2011-10-31 13:26:21,138 INFO sqlalchemy.engine.base.Engine SELECT users.id AS users_id, users.name AS users_name, users.fullname AS users_fullname, users.password AS users_password 
FROM users 
WHERE users.name = ?
 LIMIT ? OFFSET ?
2011-10-31 13:26:21,138 INFO sqlalchemy.engine.base.Engine ('vasia', 1, 0)

Process finished with exit code 0

# -*- coding: utf-8 -*-
__author__ = 'Егор'


from sqlalchemy import Column, Integer, String, create_engine
from sqlalchemy.ext.declarative import declarative_base

engine = create_engine('sqlite:///:memory:', echo=True)
Base = declarative_base()
class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    fullname = Column(String)
    password = Column(String)

    def __init__(self, name, fullname, password):
        self.name = name
        self.fullname = fullname
        self.password = password
    def __repr__(self):
        return "<User('%s','%s', '%s')>" % (self.name, self.fullname, self.password)

users_table = User.__table__
metadata = Base.metadata

from sqlalchemy.orm import sessionmaker
Session = sessionmaker(bind=engine)

Session = sessionmaker()

Session.configure(bind=engine)

session = Session()

metadata.create_all(bind=engine)

vasiaUser = User("vasia", "Vasiliy Pypkin", "vasia2000")
session.add(vasiaUser)

ourUser = session.query(User).filter_by(name="vasia").first()

print vasiaUser
print ourUser