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"""
test many to one relationships
"""
from elixir import *
def setup():
metadata.bind = 'sqlite:///'
class TestManyToOne(object):
def teardown(self):
cleanup_all(True)
def test_simple(self):
class A(Entity):
name = Field(String(60))
class B(Entity):
name = Field(String(60))
a = ManyToOne('A')
setup_all(True)
b1 = B(name='b1', a=A(name='a1'))
session.commit()
session.clear()
b = B.query.one()
assert b.a.name == 'a1'
# this test is in test_o2m.py
# def test_selfref(self):
def test_with_key_pk(self):
class A(Entity):
test = Field(Integer, primary_key=True, key='testx')
class B(Entity):
a = ManyToOne('A')
setup_all(True)
b1 = B(a=A(testx=1))
session.commit()
session.clear()
b = B.query.one()
assert b.a.testx == 1
def test_wh_key_in_m2o_col_kwargs(self):
class A(Entity):
name = Field(String(128), default="foo")
class B(Entity):
# specify a different key for the column so that
# it doesn't override the property when the column
# gets created.
a = ManyToOne('A', colname='a',
column_kwargs=dict(key='a_id'))
setup_all(True)
assert A.table.primary_key.columns.has_key('id')
assert B.table.columns.has_key('a_id')
a = A()
session.commit()
b = B(a=a)
session.commit()
session.clear()
assert B.query.first().a == A.query.first()
def test_one_pk(self):
class A(Entity):
name = Field(String(40), primary_key=True)
class B(Entity):
a = ManyToOne('A', primary_key=True)
class C(Entity):
b = ManyToOne('B', primary_key=True)
setup_all()
assert A.table.primary_key.columns.has_key('name')
assert B.table.primary_key.columns.has_key('a_name')
assert C.table.primary_key.columns.has_key('b_a_name')
def test_m2o_is_only_pk(self):
class A(Entity):
pass
class B(Entity):
a = ManyToOne('A', primary_key=True)
setup_all()
assert A.table.primary_key.columns.has_key('id')
assert B.table.primary_key.columns.has_key('a_id')
assert not B.table.primary_key.columns.has_key('id')
def test_multi_pk_in_target(self):
class A(Entity):
key1 = Field(Integer, primary_key=True)
key2 = Field(String(40), primary_key=True)
class B(Entity):
num = Field(Integer, primary_key=True)
a = ManyToOne('A', primary_key=True)
class C(Entity):
num = Field(Integer, primary_key=True)
b = ManyToOne('B', primary_key=True)
setup_all()
assert A.table.primary_key.columns.has_key('key1')
assert A.table.primary_key.columns.has_key('key2')
assert B.table.primary_key.columns.has_key('num')
assert B.table.primary_key.columns.has_key('a_key1')
assert B.table.primary_key.columns.has_key('a_key2')
assert C.table.primary_key.columns.has_key('num')
assert C.table.primary_key.columns.has_key('b_num')
assert C.table.primary_key.columns.has_key('b_a_key1')
assert C.table.primary_key.columns.has_key('b_a_key2')
def test_cycle_but_use_alter(self):
class A(Entity):
c = ManyToOne('C', use_alter=True)
class B(Entity):
a = ManyToOne('A', primary_key=True)
class C(Entity):
b = ManyToOne('B', primary_key=True)
setup_all()
assert B.table.primary_key.columns.has_key('a_id')
assert C.table.primary_key.columns.has_key('b_a_id')
assert A.table.primary_key.columns.has_key('id')
assert A.table.columns.has_key('c_b_a_id')
def test_multi(self):
class A(Entity):
name = Field(String(32))
class B(Entity):
name = Field(String(15))
a_rel1 = ManyToOne('A')
a_rel2 = ManyToOne('A')
setup_all(True)
a1 = A(name="a1")
a2 = A(name="a2")
b1 = B(name="b1", a_rel1=a1, a_rel2=a2)
b2 = B(name="b2", a_rel1=a1, a_rel2=a1)
session.commit()
session.clear()
a1 = A.get_by(name="a1")
a2 = A.get_by(name="a2")
b1 = B.get_by(name="b1")
b2 = B.get_by(name="b2")
assert a1 == b2.a_rel1
assert a2 == b1.a_rel2
def test_belongs_to_syntax(self):
class Person(Entity):
has_field('name', String(30))
class Animal(Entity):
has_field('name', String(30))
belongs_to('owner', of_kind='Person')
setup_all(True)
santa = Person(name="Santa Claus")
rudolph = Animal(name="Rudolph", owner=santa)
session.commit()
session.clear()
assert "Claus" in Animal.get_by(name="Rudolph").owner.name
|
