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POFollowing the official ORM tutorial and I'm running into an error
 

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  1. POFollowing the official ORM tutorial and I'm running into an error
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    <p>Just a heads up, I'm new to programming in general so I'm guessing I'm missing something simple. I've been trying to follow the official <a href="http://www.sqlalchemy.org/docs/orm/tutorial.html" rel="nofollow">tutorial here</a> and I'm at the <a href="http://www.sqlalchemy.org/docs/orm/tutorial.html#building-a-relationship" rel="nofollow">Building Relationships</a> section. It works up to the last session.commit() when it says there is no 'addresses' table. This is what I think the code should be doing;</p> <ol> <li>Address sets up a table.</li> <li>metadata.create_all(engine) creates the table in the current session.</li> <li>I set up the new user 'jack' including some addresses.</li> <li>I try to add 'jack', then commit.</li> </ol> <p>I'm unsure what I'm doing wrong, I'd appreciate any help.</p> <pre><code>from sqlalchemy import Table, Column, Integer, String, MetaData, ForeignKey, create_engine from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import sessionmaker, relationship, backref Base = declarative_base() metadata = MetaData() engine = create_engine('sqlite:///:memory:', echo=False) Session = sessionmaker(bind=engine) session = Session() users_table = Table('users', metadata, Column('id', Integer, primary_key=True), Column('name', String), Column('fullname', String), Column('password', String) ) 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 "&lt;User('%s', '%s', '%s')&gt;" % (self.name, self.fullname, self.password) class Address(Base): __tablename__ = 'addresses' id = Column(Integer, primary_key=True) email_address = Column(String, nullable=False) user_id = Column(Integer, ForeignKey('users.id')) user = relationship(User, backref=backref('addresses', order_by=id)) def __init__(self, email_address): self.email_address = email_address def __repr__(self): return "&lt;Address('%s')&gt;" % self.email_address metadata.create_all(engine) session.add_all([User('jim', 'Jim Gregson', 'secretword'), User('john', 'John Smith', 'password'), User('jane', 'Jane Doe', 'qweasdzxc'), User('bob', 'Bob Johnson', '122765')]) session.commit() for instance in session.query(User).order_by(User.id): print instance jack = User('jack', 'Jack Bean', 'gjffdd') print "jack.addresses: ", jack.addresses jack.addresses = [Address(email_address='jack@google.com'), Address(email_address='j25@yahoo.com')] print "jack.addresses: ", jack.addresses print "jack.addresses[1].user: ", jack.addresses[1].user session.add(jack) session.commit() Error below when 'session.commit()' is called; sqlalchemy.exc.OperationalError: (OperationalError) no such table: addresses u'INSERT INTO addresses (email_address, user_id) VALUES (?, ?)' ('jack@google.com', 5) </code></pre>
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    1. PO
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    1. PTQuestion
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    1. USakaGrim
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      1. POFollowing the official ORM tutorial and I'm running into an error
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      1. VTUpMod
    1. COErrors are fixed by looking at tracebacks - so post it.
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      1. POFollowing the official ORM tutorial and I'm running into an error
      1. USJochen Ritzel
 

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