mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-10 02:39:59 -04:00
Mike Bayer
434 lines
13 KiB
Python
434 lines
13 KiB
Python
from sqlalchemy import Integer, ForeignKey, String, MetaData
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from sqlalchemy.orm import relationship, mapper, create_session
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from sqlalchemy.ext.orderinglist import ordering_list
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from test.lib.testing import eq_
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from test.lib import fixtures, testing
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from test.lib.schema import Table, Column
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from test.lib.util import picklers
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metadata = None
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# order in whole steps
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def step_numbering(step):
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def f(index, collection):
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return step * index
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return f
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# almost fibonacci- skip the first 2 steps
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# e.g. 1, 2, 3, 5, 8, ... instead of 0, 1, 1, 2, 3, ...
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# otherwise ordering of the elements at '1' is undefined... ;)
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def fibonacci_numbering(order_col):
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def f(index, collection):
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if index == 0:
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return 1
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elif index == 1:
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return 2
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else:
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return (getattr(collection[index - 1], order_col) +
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getattr(collection[index - 2], order_col))
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return f
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# 0 -> A, 1 -> B, ... 25 -> Z, 26 -> AA, 27 -> AB, ...
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def alpha_ordering(index, collection):
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s = ''
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while index > 25:
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d = index / 26
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s += chr((d % 26) + 64)
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index -= d * 26
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s += chr(index + 65)
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return s
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class OrderingListTest(fixtures.TestBase):
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def setup(self):
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global metadata, slides_table, bullets_table, Slide, Bullet
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slides_table, bullets_table = None, None
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Slide, Bullet = None, None
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if metadata:
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metadata.clear()
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def _setup(self, test_collection_class):
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"""Build a relationship situation using the given
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test_collection_class factory"""
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global metadata, slides_table, bullets_table, Slide, Bullet
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metadata = MetaData(testing.db)
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slides_table = Table('test_Slides', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('name', String(128)))
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bullets_table = Table('test_Bullets', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('slide_id', Integer,
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ForeignKey('test_Slides.id')),
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Column('position', Integer),
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Column('text', String(128)))
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class Slide(object):
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def __init__(self, name):
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self.name = name
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def __repr__(self):
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return '<Slide "%s">' % self.name
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class Bullet(object):
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def __init__(self, text):
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self.text = text
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def __repr__(self):
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return '<Bullet "%s" pos %s>' % (self.text, self.position)
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mapper(Slide, slides_table, properties={
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'bullets': relationship(Bullet, lazy='joined',
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collection_class=test_collection_class,
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backref='slide',
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order_by=[bullets_table.c.position])
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})
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mapper(Bullet, bullets_table)
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metadata.create_all()
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def teardown(self):
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metadata.drop_all()
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def test_append_no_reorder(self):
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self._setup(ordering_list('position', count_from=1,
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reorder_on_append=False))
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s1 = Slide('Slide #1')
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self.assert_(not s1.bullets)
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self.assert_(len(s1.bullets) == 0)
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s1.bullets.append(Bullet('s1/b1'))
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self.assert_(s1.bullets)
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self.assert_(len(s1.bullets) == 1)
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self.assert_(s1.bullets[0].position == 1)
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s1.bullets.append(Bullet('s1/b2'))
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self.assert_(len(s1.bullets) == 2)
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self.assert_(s1.bullets[0].position == 1)
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self.assert_(s1.bullets[1].position == 2)
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bul = Bullet('s1/b100')
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bul.position = 100
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s1.bullets.append(bul)
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self.assert_(s1.bullets[0].position == 1)
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self.assert_(s1.bullets[1].position == 2)
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self.assert_(s1.bullets[2].position == 100)
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s1.bullets.append(Bullet('s1/b4'))
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self.assert_(s1.bullets[0].position == 1)
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self.assert_(s1.bullets[1].position == 2)
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self.assert_(s1.bullets[2].position == 100)
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self.assert_(s1.bullets[3].position == 4)
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s1.bullets._reorder()
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self.assert_(s1.bullets[0].position == 1)
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self.assert_(s1.bullets[1].position == 2)
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self.assert_(s1.bullets[2].position == 3)
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self.assert_(s1.bullets[3].position == 4)
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session = create_session()
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session.add(s1)
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session.flush()
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id = s1.id
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session.expunge_all()
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del s1
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srt = session.query(Slide).get(id)
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self.assert_(srt.bullets)
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self.assert_(len(srt.bullets) == 4)
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titles = ['s1/b1','s1/b2','s1/b100','s1/b4']
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found = [b.text for b in srt.bullets]
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self.assert_(titles == found)
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def test_append_reorder(self):
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self._setup(ordering_list('position', count_from=1,
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reorder_on_append=True))
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s1 = Slide('Slide #1')
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self.assert_(not s1.bullets)
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self.assert_(len(s1.bullets) == 0)
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s1.bullets.append(Bullet('s1/b1'))
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self.assert_(s1.bullets)
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self.assert_(len(s1.bullets) == 1)
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self.assert_(s1.bullets[0].position == 1)
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s1.bullets.append(Bullet('s1/b2'))
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self.assert_(len(s1.bullets) == 2)
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self.assert_(s1.bullets[0].position == 1)
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self.assert_(s1.bullets[1].position == 2)
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bul = Bullet('s1/b100')
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bul.position = 100
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s1.bullets.append(bul)
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self.assert_(s1.bullets[0].position == 1)
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self.assert_(s1.bullets[1].position == 2)
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self.assert_(s1.bullets[2].position == 3)
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s1.bullets.append(Bullet('s1/b4'))
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self.assert_(s1.bullets[0].position == 1)
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self.assert_(s1.bullets[1].position == 2)
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self.assert_(s1.bullets[2].position == 3)
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self.assert_(s1.bullets[3].position == 4)
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s1.bullets._reorder()
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self.assert_(s1.bullets[0].position == 1)
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self.assert_(s1.bullets[1].position == 2)
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self.assert_(s1.bullets[2].position == 3)
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self.assert_(s1.bullets[3].position == 4)
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s1.bullets._raw_append(Bullet('raw'))
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self.assert_(s1.bullets[4].position is None)
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s1.bullets._reorder()
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self.assert_(s1.bullets[4].position == 5)
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session = create_session()
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session.add(s1)
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session.flush()
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id = s1.id
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session.expunge_all()
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del s1
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srt = session.query(Slide).get(id)
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self.assert_(srt.bullets)
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self.assert_(len(srt.bullets) == 5)
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titles = ['s1/b1','s1/b2','s1/b100','s1/b4', 'raw']
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found = [b.text for b in srt.bullets]
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eq_(titles, found)
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srt.bullets._raw_append(Bullet('raw2'))
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srt.bullets[-1].position = 6
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session.flush()
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session.expunge_all()
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srt = session.query(Slide).get(id)
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titles = ['s1/b1','s1/b2','s1/b100','s1/b4', 'raw', 'raw2']
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found = [b.text for b in srt.bullets]
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eq_(titles, found)
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def test_insert(self):
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self._setup(ordering_list('position'))
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s1 = Slide('Slide #1')
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s1.bullets.append(Bullet('1'))
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s1.bullets.append(Bullet('2'))
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s1.bullets.append(Bullet('3'))
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s1.bullets.append(Bullet('4'))
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self.assert_(s1.bullets[0].position == 0)
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self.assert_(s1.bullets[1].position == 1)
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self.assert_(s1.bullets[2].position == 2)
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self.assert_(s1.bullets[3].position == 3)
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s1.bullets.insert(2, Bullet('insert_at_2'))
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self.assert_(s1.bullets[0].position == 0)
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self.assert_(s1.bullets[1].position == 1)
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self.assert_(s1.bullets[2].position == 2)
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self.assert_(s1.bullets[3].position == 3)
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self.assert_(s1.bullets[4].position == 4)
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self.assert_(s1.bullets[1].text == '2')
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self.assert_(s1.bullets[2].text == 'insert_at_2')
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self.assert_(s1.bullets[3].text == '3')
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s1.bullets.insert(999, Bullet('999'))
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self.assert_(len(s1.bullets) == 6)
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self.assert_(s1.bullets[5].position == 5)
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session = create_session()
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session.add(s1)
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session.flush()
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id = s1.id
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session.expunge_all()
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del s1
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srt = session.query(Slide).get(id)
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self.assert_(srt.bullets)
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self.assert_(len(srt.bullets) == 6)
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texts = ['1','2','insert_at_2','3','4','999']
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found = [b.text for b in srt.bullets]
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self.assert_(texts == found)
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def test_slice(self):
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self._setup(ordering_list('position'))
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b = [ Bullet('1'), Bullet('2'), Bullet('3'),
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Bullet('4'), Bullet('5'), Bullet('6') ]
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s1 = Slide('Slide #1')
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# 1, 2, 3
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s1.bullets[0:3] = b[0:3]
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for i in 0, 1, 2:
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self.assert_(s1.bullets[i].position == i)
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self.assert_(s1.bullets[i] == b[i])
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# 1, 4, 5, 6, 3
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s1.bullets[1:2] = b[3:6]
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for li, bi in (0,0), (1,3), (2,4), (3,5), (4,2):
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self.assert_(s1.bullets[li].position == li)
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self.assert_(s1.bullets[li] == b[bi])
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# 1, 6, 3
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del s1.bullets[1:3]
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for li, bi in (0,0), (1,5), (2,2):
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self.assert_(s1.bullets[li].position == li)
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self.assert_(s1.bullets[li] == b[bi])
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session = create_session()
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session.add(s1)
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session.flush()
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id = s1.id
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session.expunge_all()
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del s1
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srt = session.query(Slide).get(id)
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self.assert_(srt.bullets)
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self.assert_(len(srt.bullets) == 3)
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texts = ['1', '6', '3']
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for i, text in enumerate(texts):
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self.assert_(srt.bullets[i].position == i)
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self.assert_(srt.bullets[i].text == text)
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def test_replace(self):
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self._setup(ordering_list('position'))
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s1 = Slide('Slide #1')
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s1.bullets = [ Bullet('1'), Bullet('2'), Bullet('3') ]
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self.assert_(len(s1.bullets) == 3)
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self.assert_(s1.bullets[2].position == 2)
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session = create_session()
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session.add(s1)
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session.flush()
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new_bullet = Bullet('new 2')
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self.assert_(new_bullet.position is None)
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# mark existing bullet as db-deleted before replacement.
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#session.delete(s1.bullets[1])
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s1.bullets[1] = new_bullet
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self.assert_(new_bullet.position == 1)
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self.assert_(len(s1.bullets) == 3)
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id = s1.id
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session.flush()
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session.expunge_all()
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srt = session.query(Slide).get(id)
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self.assert_(srt.bullets)
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self.assert_(len(srt.bullets) == 3)
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self.assert_(srt.bullets[1].text == 'new 2')
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self.assert_(srt.bullets[2].text == '3')
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def test_funky_ordering(self):
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class Pos(object):
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def __init__(self):
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self.position = None
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step_factory = ordering_list('position',
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ordering_func=step_numbering(2))
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stepped = step_factory()
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stepped.append(Pos())
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stepped.append(Pos())
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stepped.append(Pos())
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stepped.append(Pos())
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for li, pos in (0,0), (1,2), (2,4), (3,6):
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self.assert_(stepped[li].position == pos)
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fib_factory = ordering_list('position',
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ordering_func=fibonacci_numbering('position'))
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fibbed = fib_factory()
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fibbed.append(Pos())
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fibbed.append(Pos())
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fibbed.append(Pos())
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fibbed.append(Pos())
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fibbed.append(Pos())
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for li, pos in (0,1), (1,2), (2,3), (3,5), (4,8):
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self.assert_(fibbed[li].position == pos)
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fibbed.insert(2, Pos())
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fibbed.insert(4, Pos())
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fibbed.insert(6, Pos())
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for li, pos in (
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(0, 1),
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(1, 2),
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(2, 3),
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(3, 5),
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(4, 8),
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(5, 13),
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(6, 21),
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(7, 34),
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):
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self.assert_(fibbed[li].position == pos)
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alpha_factory = ordering_list('position',
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ordering_func=alpha_ordering)
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alpha = alpha_factory()
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alpha.append(Pos())
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alpha.append(Pos())
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alpha.append(Pos())
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alpha.insert(1, Pos())
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for li, pos in (0,'A'), (1,'B'), (2,'C'), (3,'D'):
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self.assert_(alpha[li].position == pos)
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def test_picklability(self):
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from sqlalchemy.ext.orderinglist import OrderingList
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olist = OrderingList('order', reorder_on_append=True)
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olist.append(DummyItem())
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for loads, dumps in picklers():
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pck = dumps(olist)
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copy = loads(pck)
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self.assert_(copy == olist)
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self.assert_(copy.__dict__ == olist.__dict__)
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class DummyItem(object):
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def __init__(self, order=None):
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self.order = order
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def __eq__(self, other):
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return self.order == other.order
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def __ne__(self, other):
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return not (self == other)
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