tables.py

SQLAlchemy. 经典的Python ORM框架。学习必看。

# can't be imported until the path is setup; be sure to configure
# first if covering.
from sqlalchemy import *
from testlib import testing
from testlib.schema import Table, Column


# these are older test fixtures, used primarily by test/orm/mapper.py and
# test/orm/unitofwork.py.  newer unit tests make usage of
# test/orm/fixtures.py.

metadata = MetaData()

users = Table('users', metadata,
    Column('user_id', Integer, Sequence('user_id_seq', optional=True), primary_key = True),
    Column('user_name', String(40)),
    test_needs_acid=True,
    test_needs_fk=True,
)

addresses = Table('email_addresses', metadata,
    Column('address_id', Integer, Sequence('address_id_seq', optional=True), primary_key = True),
    Column('user_id', Integer, ForeignKey(users.c.user_id)),
    Column('email_address', String(40)),
)

orders = Table('orders', metadata,
    Column('order_id', Integer, Sequence('order_id_seq', optional=True), primary_key = True),
    Column('user_id', Integer, ForeignKey(users.c.user_id)),
    Column('description', String(50)),
    Column('isopen', Integer),
)

orderitems = Table('items', metadata,
    Column('item_id', INT, Sequence('items_id_seq', optional=True), primary_key = True),
    Column('order_id', INT, ForeignKey("orders")),
    Column('item_name', VARCHAR(50)),
)

keywords = Table('keywords', metadata,
    Column('keyword_id', Integer, Sequence('keyword_id_seq', optional=True), primary_key = True),
    Column('name', VARCHAR(50)),
)

userkeywords = Table('userkeywords', metadata,
    Column('user_id', INT, ForeignKey("users")),
    Column('keyword_id', INT, ForeignKey("keywords")),
)

itemkeywords = Table('itemkeywords', metadata,
    Column('item_id', INT, ForeignKey("items")),
    Column('keyword_id', INT, ForeignKey("keywords")),
#    Column('foo', Boolean, default=True)
)

def create():
    if not metadata.bind:
        metadata.bind = testing.db
    metadata.create_all()
def drop():
    if not metadata.bind:
        metadata.bind = testing.db
    metadata.drop_all()
def delete():
    for t in metadata.table_iterator(reverse=True):
        t.delete().execute()
def user_data():
    if not metadata.bind:
        metadata.bind = testing.db
    users.insert().execute(
        dict(user_id = 7, user_name = 'jack'),
        dict(user_id = 8, user_name = 'ed'),
        dict(user_id = 9, user_name = 'fred')
    )
def delete_user_data():
    users.delete().execute()

def data():
    delete()

    # with SQLITE, the OID column of a table defaults to the primary key, if it has one.
    # so to database-neutrally get rows back in "insert order" based on OID, we
    # have to also put the primary keys in order for the purpose of these tests
    users.insert().execute(
        dict(user_id = 7, user_name = 'jack'),
        dict(user_id = 8, user_name = 'ed'),
        dict(user_id = 9, user_name = 'fred')
    )
    addresses.insert().execute(
        dict(address_id = 1, user_id = 7, email_address = "[e-mail]"),
        dict(address_id = 2, user_id = 8, email_address = "[e-mail]"),
        dict(address_id = 3, user_id = 8, email_address = "[e-mail]"),
        dict(address_id = 4, user_id = 8, email_address = "[e-mail]")
    )
    orders.insert().execute(
        dict(order_id = 1, user_id = 7, description = 'order 1', isopen=0),
        dict(order_id = 2, user_id = 9, description = 'order 2', isopen=0),
        dict(order_id = 3, user_id = 7, description = 'order 3', isopen=1),
        dict(order_id = 4, user_id = 9, description = 'order 4', isopen=1),
        dict(order_id = 5, user_id = 7, description = 'order 5', isopen=0)
    )
    orderitems.insert().execute(
        dict(item_id=1, order_id=2, item_name='item 1'),
        dict(item_id=2, order_id=2, item_name='item 2'),
        dict(item_id=3, order_id=3, item_name='item 3'),
        dict(item_id=4, order_id=3, item_name='item 4'),
        dict(item_id=5, order_id=3, item_name='item 5'),
    )
    keywords.insert().execute(
        dict(keyword_id=1, name='blue'),
        dict(keyword_id=2, name='red'),
        dict(keyword_id=3, name='green'),
        dict(keyword_id=4, name='big'),
        dict(keyword_id=5, name='small'),
        dict(keyword_id=6, name='round'),
        dict(keyword_id=7, name='square')
    )

    # this many-to-many table has the keywords inserted
    # in primary key order, to appease the unit tests.
    # this is because postgres, oracle, and sqlite all support
    # true insert-order row id, but of course our pal MySQL does not,
    # so the best it can do is order by, well something, so there you go.
    itemkeywords.insert().execute(
        dict(keyword_id=2, item_id=1),
        dict(keyword_id=2, item_id=2),
        dict(keyword_id=4, item_id=1),
        dict(keyword_id=6, item_id=1),
        dict(keyword_id=5, item_id=2),
        dict(keyword_id=3, item_id=3),
        dict(keyword_id=4, item_id=3),
        dict(keyword_id=7, item_id=2),
        dict(keyword_id=6, item_id=3)
    )

class BaseObject(object):
    def __repr__(self):
        return "%s(%s)" % (self.__class__.__name__,
                           ",".join(["%s=%s" % (k, repr(v))
                                     for k, v in self.__dict__.iteritems()
                                     if k[0] != '_']))

class User(BaseObject):
    def __init__(self):
        self.user_id = None

class Address(BaseObject):
    pass

class Order(BaseObject):
    def __init__(self):
        self.isopen=0

class Item(BaseObject):
    pass

class Keyword(BaseObject):
    pass

user_result = [{'user_id' : 7}, {'user_id' : 8}, {'user_id' : 9}]

user_address_result = [
{'user_id' : 7, 'addresses' : (Address, [{'address_id' : 1}])},
{'user_id' : 8, 'addresses' : (Address, [{'address_id' : 2}, {'address_id' : 3}, {'address_id' : 4}])},
{'user_id' : 9, 'addresses' : (Address, [])}
]

user_address_orders_result = [{'user_id' : 7,
    'addresses' : (Address, [{'address_id' : 1}]),
    'orders' : (Order, [{'order_id' : 1}, {'order_id' : 3},{'order_id' : 5},])
    },
    {'user_id' : 8,
        'addresses' : (Address, [{'address_id' : 2}, {'address_id' : 3}, {'address_id' : 4}]),
        'orders' : (Order, [])
    },
    {'user_id' : 9,
        'addresses' : (Address, []),
        'orders' : (Order, [{'order_id' : 2},{'order_id' : 4}])
}]

user_all_result = [
{'user_id' : 7,
    'addresses' : (Address, [{'address_id' : 1}]),
    'orders' : (Order, [
        {'order_id' : 1, 'items': (Item, [])},
        {'order_id' : 3, 'items': (Item, [{'item_id':3, 'item_name':'item 3'}, {'item_id':4, 'item_name':'item 4'}, {'item_id':5, 'item_name':'item 5'}])},
        {'order_id' : 5, 'items': (Item, [])},
        ])
},
{'user_id' : 8,
    'addresses' : (Address, [{'address_id' : 2}, {'address_id' : 3}, {'address_id' : 4}]),
    'orders' : (Order, [])
},
{'user_id' : 9,
    'addresses' : (Address, []),
    'orders' : (Order, [
        {'order_id' : 2, 'items': (Item, [{'item_id':1, 'item_name':'item 1'}, {'item_id':2, 'item_name':'item 2'}])},
        {'order_id' : 4, 'items': (Item, [])}
    ])
}]

item_keyword_result = [
{'item_id' : 1, 'keywords' : (Keyword, [{'keyword_id' : 2, 'name':'red'}, {'keyword_id' : 4, 'name':'big'}, {'keyword_id' : 6, 'name':'round'}])},
{'item_id' : 2, 'keywords' : (Keyword, [{'keyword_id' : 2, 'name':'red'}, {'keyword_id' : 5, 'name':'small'}, {'keyword_id' : 7, 'name':'square'}])},
{'item_id' : 3, 'keywords' : (Keyword, [{'keyword_id' : 3,'name':'green'}, {'keyword_id' : 4,'name':'big'}, {'keyword_id' : 6,'name':'round'}])},
{'item_id' : 4, 'keywords' : (Keyword, [])},
{'item_id' : 5, 'keywords' : (Keyword, [])}
]

order_result = [
{'order_id' : 1, 'items':(Item, [])},
{'order_id' : 2, 'items':(Item, [
    {'item_id' : 1, 'keywords' : (Keyword, [{'keyword_id' : 2}, {'keyword_id' : 4}, {'keyword_id' : 6}])},
    {'item_id' : 2, 'keywords' : (Keyword, [{'keyword_id' : 2, 'name':'red'}, {'keyword_id' : 5, 'name':'small'}, {'keyword_id' : 7, 'name':'square'}])},
    ])},
{'order_id' : 3, 'items':(Item, [
    {'item_id' : 3, 'keywords' : (Keyword, [{'keyword_id' : 3,'name':'green'}, {'keyword_id' : 4,'name':'big'}, {'keyword_id' : 6,'name':'round'}])},
    {'item_id' : 4, 'keywords' : (Keyword, [])},
    {'item_id' : 5, 'keywords' : (Keyword, [])}
    ])},
{'order_id' : 4, 'items':(Item, [])},
{'order_id' : 5, 'items':(Item, [])},
]