mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-17 22:22:13 -04:00
Federico Caselli
e860060866
This change includes mainly that the bracketed use within select() is moved to positional, and keyword arguments are removed from calls to the select() function. it does not yet fully address other issues such as keyword arguments passed to the table.select(). Additionally, allows False / None to both be considered as "disable" for all of select.correlate(), select.correlate_except(), query.correlate(), which establishes consistency with passing of ``False`` for the legact select(correlate=False) argument. Change-Id: Ie6c6e6abfbd3d75d4c8de504c0cf0159e6999108
130 lines
4.0 KiB
Python
130 lines
4.0 KiB
Python
from sqlalchemy import Column
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from sqlalchemy import Enum
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from sqlalchemy import ForeignKey
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from sqlalchemy import Integer
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from sqlalchemy import MetaData
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from sqlalchemy import select
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from sqlalchemy import String
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from sqlalchemy import Table
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from sqlalchemy import testing
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from sqlalchemy.orm import join as ormjoin
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from sqlalchemy.orm import mapper
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from sqlalchemy.orm import relationship
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from sqlalchemy.testing import eq_
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from sqlalchemy.testing import fixtures
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from sqlalchemy.testing import profiling
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from sqlalchemy.util import classproperty
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class EnumTest(fixtures.TestBase):
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__requires__ = ("cpython", "python_profiling_backend")
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def setup(self):
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class SomeEnum(object):
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# Implements PEP 435 in the minimal fashion needed by SQLAlchemy
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_members = {}
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@classproperty
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def __members__(cls):
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"""simulate a very expensive ``__members__`` getter"""
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for i in range(10):
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x = {}
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x.update({k: v for k, v in cls._members.items()}.copy())
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return x.copy()
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def __init__(self, name, value):
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self.name = name
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self.value = value
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self._members[name] = self
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setattr(self.__class__, name, self)
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for i in range(400):
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SomeEnum("some%d" % i, i)
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self.SomeEnum = SomeEnum
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@profiling.function_call_count()
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def test_create_enum_from_pep_435_w_expensive_members(self):
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Enum(self.SomeEnum)
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class CacheKeyTest(fixtures.TestBase):
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# python3 is just to have less variability in test counts
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__requires__ = ("cpython", "python_profiling_backend", "python3")
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@testing.fixture(scope="class")
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def mapping_fixture(self):
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# note in order to work nicely with "fixture" we are emerging
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# a whole new model of setup/teardown, since pytest "fixture"
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# sort of purposely works badly with setup/teardown
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metadata = MetaData()
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parent = Table(
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"parent",
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metadata,
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Column("id", Integer, primary_key=True),
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Column("data", String(20)),
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)
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child = Table(
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"child",
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metadata,
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Column("id", Integer, primary_key=True),
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Column("data", String(20)),
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Column(
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"parent_id", Integer, ForeignKey("parent.id"), nullable=False
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),
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)
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class Parent(testing.entities.BasicEntity):
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pass
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class Child(testing.entities.BasicEntity):
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pass
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mapper(
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Parent,
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parent,
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properties={"children": relationship(Child, backref="parent")},
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)
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mapper(Child, child)
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return Parent, Child
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@testing.fixture(scope="function")
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def stmt_fixture_one(self, mapping_fixture):
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# note that by using ORM elements we will have annotations in these
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# items also which is part of the performance hit
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Parent, Child = mapping_fixture
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return [
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(
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select(Parent.id, Child.id)
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.select_from(ormjoin(Parent, Child, Parent.children))
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.where(Child.id == 5)
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)
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for i in range(100)
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]
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@profiling.function_call_count(variance=0.15, warmup=2)
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def test_statement_key_is_cached(self, stmt_fixture_one):
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current_key = None
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for stmt in stmt_fixture_one:
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key = stmt._generate_cache_key()
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assert key is not None
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if current_key:
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eq_(key, current_key)
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else:
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current_key = key
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@profiling.function_call_count(variance=0.15, warmup=0)
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def test_statement_key_is_not_cached(self, stmt_fixture_one):
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current_key = None
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for stmt in stmt_fixture_one:
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key = stmt._generate_cache_key()
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assert key is not None
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if current_key:
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eq_(key, current_key)
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else:
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current_key = key
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