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import testbase
from sqlalchemy import *
class AssociationTest(testbase.PersistTest):
def setUpAll(self):
global items, item_keywords, keywords, metadata, Item, Keyword, KeywordAssociation
metadata = BoundMetaData(testbase.db)
items = Table('items', metadata,
Column('item_id', Integer, primary_key=True),
Column('name', String(40)),
)
item_keywords = Table('item_keywords', metadata,
Column('item_id', Integer, ForeignKey('items.item_id')),
Column('keyword_id', Integer, ForeignKey('keywords.keyword_id')),
Column('data', String(40))
)
keywords = Table('keywords', metadata,
Column('keyword_id', Integer, primary_key=True),
Column('name', String(40))
)
metadata.create_all()
class Item(object):
def __init__(self, name):
self.name = name
def __repr__(self):
return "Item id=%d name=%s keywordassoc=%s" % (self.item_id, self.name, repr(self.keywords))
class Keyword(object):
def __init__(self, name):
self.name = name
def __repr__(self):
return "Keyword id=%d name=%s" % (self.keyword_id, self.name)
class KeywordAssociation(object):
def __init__(self, keyword, data):
self.keyword = keyword
self.data = data
def __repr__(self):
return "KeywordAssociation itemid=%d keyword=%s data=%s" % (self.item_id, repr(self.keyword), self.data)
mapper(Keyword, keywords)
mapper(KeywordAssociation, item_keywords, properties={
'keyword':relation(Keyword, lazy=False)
}, primary_key=[item_keywords.c.item_id, item_keywords.c.keyword_id], order_by=[item_keywords.c.data])
mapper(Item, items, properties={
'keywords' : relation(KeywordAssociation, association=Keyword)
})
def tearDown(self):
for t in metadata.table_iterator(reverse=True):
t.delete().execute()
def tearDownAll(self):
clear_mappers()
metadata.drop_all()
def testinsert(self):
sess = create_session()
item1 = Item('item1')
item2 = Item('item2')
item1.keywords.append(KeywordAssociation(Keyword('blue'), 'blue_assoc'))
item1.keywords.append(KeywordAssociation(Keyword('red'), 'red_assoc'))
item2.keywords.append(KeywordAssociation(Keyword('green'), 'green_assoc'))
sess.save(item1)
sess.save(item2)
sess.flush()
saved = repr([item1, item2])
sess.clear()
l = sess.query(Item).select()
loaded = repr(l)
print saved
print loaded
self.assert_(saved == loaded)
def testreplace(self):
sess = create_session()
item1 = Item('item1')
item1.keywords.append(KeywordAssociation(Keyword('blue'), 'blue_assoc'))
item1.keywords.append(KeywordAssociation(Keyword('red'), 'red_assoc'))
sess.save(item1)
sess.flush()
red_keyword = item1.keywords[1].keyword
del item1.keywords[1]
item1.keywords.append(KeywordAssociation(red_keyword, 'new_red_assoc'))
sess.flush()
saved = repr([item1])
sess.clear()
l = sess.query(Item).select()
loaded = repr(l)
print saved
print loaded
self.assert_(saved == loaded)
def testmodify(self):
sess = create_session()
item1 = Item('item1')
item2 = Item('item2')
item1.keywords.append(KeywordAssociation(Keyword('blue'), 'blue_assoc'))
item1.keywords.append(KeywordAssociation(Keyword('red'), 'red_assoc'))
item2.keywords.append(KeywordAssociation(Keyword('green'), 'green_assoc'))
sess.save(item1)
sess.save(item2)
sess.flush()
red_keyword = item1.keywords[1].keyword
del item1.keywords[0]
del item1.keywords[0]
purple_keyword = Keyword('purple')
item1.keywords.append(KeywordAssociation(red_keyword, 'new_red_assoc'))
item2.keywords.append(KeywordAssociation(purple_keyword, 'purple_item2_assoc'))
item1.keywords.append(KeywordAssociation(purple_keyword, 'purple_item1_assoc'))
item1.keywords.append(KeywordAssociation(Keyword('yellow'), 'yellow_assoc'))
sess.flush()
saved = repr([item1, item2])
sess.clear()
l = sess.query(Item).select()
loaded = repr(l)
print saved
print loaded
self.assert_(saved == loaded)
def testdelete(self):
sess = create_session()
item1 = Item('item1')
item2 = Item('item2')
item1.keywords.append(KeywordAssociation(Keyword('blue'), 'blue_assoc'))
item1.keywords.append(KeywordAssociation(Keyword('red'), 'red_assoc'))
item2.keywords.append(KeywordAssociation(Keyword('green'), 'green_assoc'))
sess.save(item1)
sess.save(item2)
sess.flush()
self.assert_(item_keywords.count().scalar() == 3)
sess.delete(item1)
sess.delete(item2)
sess.flush()
self.assert_(item_keywords.count().scalar() == 0)
class AssociationTest2(testbase.PersistTest):
def setUpAll(self):
global table_originals, table_people, table_isauthor, metadata, Originals, People, IsAuthor
metadata = BoundMetaData(testbase.db)
table_originals = Table('Originals', metadata,
Column('ID', Integer, primary_key=True),
Column('Title', String(200), nullable=False),
Column('Date', Date ),
)
table_people = Table('People', metadata,
Column('ID', Integer, primary_key=True),
Column('Name', String(140), nullable=False),
Column('Country', CHAR(2), default='es'),
)
table_isauthor = Table('IsAuthor', metadata,
Column('OriginalsID', Integer, ForeignKey('Originals.ID'),
default=None),
Column('PeopleID', Integer, ForeignKey('People.ID'),
default=None),
Column('Kind', CHAR(1), default='A'),
)
metadata.create_all()
class Base(object):
def __init__(self, **kw):
for k,v in kw.iteritems():
setattr(self, k, v)
def display(self):
c = [ "%s=%s" % (col.key, repr(getattr(self, col.key))) for col
in self.c ]
return "%s(%s)" % (self.__class__.__name__, ', '.join(c))
def __repr__(self):
return self.display()
def __str__(self):
return self.display()
class Originals(Base):
order = [table_originals.c.Title, table_originals.c.Date]
class People(Base):
order = [table_people.c.Name]
class IsAuthor(Base):
pass
mapper(Originals, table_originals, order_by=Originals.order,
properties={
'people': relation(IsAuthor, association=People),
'authors': relation(People, secondary=table_isauthor, backref='written',
primaryjoin=and_(table_originals.c.ID==table_isauthor.c.OriginalsID,
table_isauthor.c.Kind=='A')),
'title': table_originals.c.Title,
'date': table_originals.c.Date,
})
mapper(People, table_people, order_by=People.order, properties= {
'originals': relation(IsAuthor, association=Originals),
'name': table_people.c.Name,
'country': table_people.c.Country,
})
mapper(IsAuthor, table_isauthor,
primary_key=[table_isauthor.c.OriginalsID, table_isauthor.c.PeopleID,
table_isauthor.c.Kind],
properties={
'original': relation(Originals, lazy=False),
'person': relation(People, lazy=False),
'kind': table_isauthor.c.Kind,
})
def tearDown(self):
for t in metadata.table_iterator(reverse=True):
t.delete().execute()
def tearDownAll(self):
clear_mappers()
metadata.drop_all()
def testinsert(self):
# this test is sure to get more complex...
p = People(name='name', country='es')
sess = create_session()
sess.save(p)
sess.flush()
if __name__ == "__main__":
testbase.main()
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