def test_table_plus_column_exceeds_length(self):
"""test that the truncation occurs if tablename / colname are only
greater than the max when concatenated."""
compile_dialect = default.DefaultDialect(label_length=30)
m = MetaData()
a_table = Table(
'thirty_characters_table_xxxxxx',
m,
Column('id', Integer, primary_key=True)
)
other_table = Table(
'other_thirty_characters_table_',
m,
Column('id', Integer, primary_key=True),
Column('thirty_characters_table_id',
Integer,
ForeignKey('thirty_characters_table_xxxxxx.id'),
primary_key=True
)
)
anon = a_table.alias()
self.assert_compile(
select([other_table,anon]).
select_from(
other_table.outerjoin(anon)
).apply_labels(),
"SELECT other_thirty_characters_table_.id AS "
"other_thirty_characters__1, "
"other_thirty_characters_table_.thirty_characters_table_id "
"AS other_thirty_characters__2, thirty_characters_table__1.id "
"AS thirty_characters_table__3 "
"FROM other_thirty_characters_table_ "
"LEFT OUTER JOIN thirty_characters_table_xxxxxx "
"AS thirty_characters_table__1 ON "
"thirty_characters_table__1.id = "
"other_thirty_characters_table_.thirty_characters_table_id",
dialect=compile_dialect)
self.assert_compile(
select([other_table, anon]).
select_from(
other_table.outerjoin(anon)
).apply_labels(),
"SELECT other_thirty_characters_table_.id AS "
"other_thirty_characters__1, "
"other_thirty_characters_table_.thirty_characters_table_id "
"AS other_thirty_characters__2, "
"thirty_characters_table__1.id AS thirty_characters_table__3 "
"FROM other_thirty_characters_table_ "
"LEFT OUTER JOIN thirty_characters_table_xxxxxx "
"AS thirty_characters_table__1 ON "
"thirty_characters_table__1.id = "
"other_thirty_characters_table_.thirty_characters_table_id",
dialect=compile_dialect
)
def test_table_plus_column_exceeds_length(self):
"""test that the truncation occurs if tablename / colname are only
greater than the max when concatenated."""
compile_dialect = default.DefaultDialect(label_length=30)
m = MetaData()
a_table = Table('thirty_characters_table_xxxxxx', m,
Column('id', Integer, primary_key=True))
other_table = Table(
'other_thirty_characters_table_', m,
Column('id', Integer, primary_key=True),
Column('thirty_characters_table_id',
Integer,
ForeignKey('thirty_characters_table_xxxxxx.id'),
primary_key=True))
anon = a_table.alias()
self.assert_compile(
select([other_table, anon
]).select_from(other_table.outerjoin(anon)).apply_labels(),
"SELECT other_thirty_characters_table_.id AS "
"other_thirty_characters__1, "
"other_thirty_characters_table_.thirty_characters_table_id "
"AS other_thirty_characters__2, thirty_characters_table__1.id "
"AS thirty_characters_table__3 "
"FROM other_thirty_characters_table_ "
"LEFT OUTER JOIN thirty_characters_table_xxxxxx "
"AS thirty_characters_table__1 ON "
"thirty_characters_table__1.id = "
"other_thirty_characters_table_.thirty_characters_table_id",
dialect=compile_dialect)
self.assert_compile(
select([other_table, anon
]).select_from(other_table.outerjoin(anon)).apply_labels(),
"SELECT other_thirty_characters_table_.id AS "
"other_thirty_characters__1, "
"other_thirty_characters_table_.thirty_characters_table_id "
"AS other_thirty_characters__2, "
"thirty_characters_table__1.id AS thirty_characters_table__3 "
"FROM other_thirty_characters_table_ "
"LEFT OUTER JOIN thirty_characters_table_xxxxxx "
"AS thirty_characters_table__1 ON "
"thirty_characters_table__1.id = "
"other_thirty_characters_table_.thirty_characters_table_id",
dialect=compile_dialect)
def define_tables(cls, metadata):
global Table1, Table1B, Table2, Table3, Data
table1 = Table('table1', metadata,
Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
Column('related_id', Integer, ForeignKey('table1.id'), nullable=True),
Column('type', String(30)),
Column('name', String(30))
)
table2 = Table('table2', metadata,
Column('id', Integer, ForeignKey('table1.id'), primary_key=True),
)
table3 = Table('table3', metadata,
Column('id', Integer, ForeignKey('table1.id'), primary_key=True),
)
data = Table('data', metadata,
Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
Column('node_id', Integer, ForeignKey('table1.id')),
Column('data', String(30))
)
#join = polymorphic_union(
# {
# 'table3' : table1.join(table3),
# 'table2' : table1.join(table2),
# 'table1' : table1.select(table1.c.type.in_(['table1', 'table1b'])),
# }, None, 'pjoin')
join = table1.outerjoin(table2).outerjoin(table3).alias('pjoin')
#join = None
class Table1(object):
def __init__(self, name, data=None):
self.name = name
if data is not None:
self.data = data
def __repr__(self):
return "%s(%s, %s, %s)" % (self.__class__.__name__, self.id, repr(str(self.name)), repr(self.data))
class Table1B(Table1):
pass
class Table2(Table1):
pass
class Table3(Table1):
pass
class Data(object):
def __init__(self, data):
self.data = data
def __repr__(self):
return "%s(%s, %s)" % (self.__class__.__name__, self.id, repr(str(self.data)))
try:
# this is how the mapping used to work. ensure that this raises an error now
table1_mapper = mapper(Table1, table1,
select_table=join,
polymorphic_on=table1.c.type,
polymorphic_identity='table1',
properties={
'nxt': relationship(Table1,
backref=backref('prev', foreignkey=join.c.id, uselist=False),
uselist=False, primaryjoin=join.c.id==join.c.related_id),
'data':relationship(mapper(Data, data))
},
order_by=table1.c.id)
configure_mappers()
assert False
except:
assert True
clear_mappers()
# currently, the "eager" relationships degrade to lazy relationships
# due to the polymorphic load.
# the "nxt" relationship used to have a "lazy='joined'" on it, but the EagerLoader raises the "self-referential"
# exception now. since eager loading would never work for that relationship anyway, its better that the user
# gets an exception instead of it silently not eager loading.
# NOTE: using "nxt" instead of "next" to avoid 2to3 turning it into __next__() for some reason.
table1_mapper = mapper(Table1, table1,
#select_table=join,
polymorphic_on=table1.c.type,
polymorphic_identity='table1',
properties={
'nxt': relationship(Table1,
backref=backref('prev', remote_side=table1.c.id, uselist=False),
uselist=False, primaryjoin=table1.c.id==table1.c.related_id),
'data':relationship(mapper(Data, data), lazy='joined', order_by=data.c.id)
},
order_by=table1.c.id
)
table1b_mapper = mapper(Table1B, inherits=table1_mapper, polymorphic_identity='table1b')
table2_mapper = mapper(Table2, table2,
inherits=table1_mapper,
polymorphic_identity='table2')
table3_mapper = mapper(Table3, table3, inherits=table1_mapper, polymorphic_identity='table3')
configure_mappers()
assert table1_mapper.primary_key == (table1.c.id,), table1_mapper.primary_key
def define_tables(cls, metadata):
global Table1, Table1B, Table2, Table3, Data
table1 = Table(
'table1', metadata,
Column('id',
Integer,
primary_key=True,
test_needs_autoincrement=True),
Column('related_id',
Integer,
ForeignKey('table1.id'),
nullable=True), Column('type', String(30)),
Column('name', String(30)))
table2 = Table(
'table2',
metadata,
Column('id', Integer, ForeignKey('table1.id'), primary_key=True),
)
table3 = Table(
'table3',
metadata,
Column('id', Integer, ForeignKey('table1.id'), primary_key=True),
)
data = Table(
'data', metadata,
Column('id',
Integer,
primary_key=True,
test_needs_autoincrement=True),
Column('node_id', Integer, ForeignKey('table1.id')),
Column('data', String(30)))
#join = polymorphic_union(
# {
# 'table3' : table1.join(table3),
# 'table2' : table1.join(table2),
# 'table1' : table1.select(table1.c.type.in_(['table1', 'table1b'])),
# }, None, 'pjoin')
join = table1.outerjoin(table2).outerjoin(table3).alias('pjoin')
#join = None
class Table1(object):
def __init__(self, name, data=None):
self.name = name
if data is not None:
self.data = data
def __repr__(self):
return "%s(%s, %s, %s)" % (self.__class__.__name__, self.id,
repr(str(self.name)), repr(
self.data))
class Table1B(Table1):
pass
class Table2(Table1):
pass
class Table3(Table1):
pass
class Data(object):
def __init__(self, data):
self.data = data
def __repr__(self):
return "%s(%s, %s)" % (self.__class__.__name__, self.id,
repr(str(self.data)))
try:
# this is how the mapping used to work. ensure that this raises an error now
table1_mapper = mapper(
Table1,
table1,
select_table=join,
polymorphic_on=table1.c.type,
polymorphic_identity='table1',
properties={
'nxt':
relationship(Table1,
backref=backref('prev',
foreignkey=join.c.id,
uselist=False),
uselist=False,
primaryjoin=join.c.id == join.c.related_id),
'data':
relationship(mapper(Data, data))
},
order_by=table1.c.id)
configure_mappers()
assert False
except:
assert True
clear_mappers()
# currently, the "eager" relationships degrade to lazy relationships
# due to the polymorphic load.
# the "nxt" relationship used to have a "lazy='joined'" on it, but the EagerLoader raises the "self-referential"
# exception now. since eager loading would never work for that relationship anyway, its better that the user
# gets an exception instead of it silently not eager loading.
# NOTE: using "nxt" instead of "next" to avoid 2to3 turning it into __next__() for some reason.
table1_mapper = mapper(
Table1,
table1,
#select_table=join,
polymorphic_on=table1.c.type,
polymorphic_identity='table1',
properties={
'nxt':
relationship(Table1,
backref=backref('prev',
remote_side=table1.c.id,
uselist=False),
uselist=False,
primaryjoin=table1.c.id == table1.c.related_id),
'data':
relationship(mapper(Data, data),
lazy='joined',
order_by=data.c.id)
},
order_by=table1.c.id)
table1b_mapper = mapper(Table1B,
inherits=table1_mapper,
polymorphic_identity='table1b')
table2_mapper = mapper(Table2,
table2,
inherits=table1_mapper,
polymorphic_identity='table2')
table3_mapper = mapper(Table3,
table3,
inherits=table1_mapper,
polymorphic_identity='table3')
configure_mappers()
assert table1_mapper.primary_key == (
table1.c.id, ), table1_mapper.primary_key
