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import pytest
import sqlalchemy as sa
from sqlalchemy_utils import get_fk_constraint_for_columns, has_unique_index
class TestHasUniqueIndex:
@pytest.fixture
def articles(self, Base):
class Article(Base):
__tablename__ = 'article'
id = sa.Column(sa.Integer, primary_key=True)
return Article.__table__
@pytest.fixture
def article_translations(self, Base):
class ArticleTranslation(Base):
__tablename__ = 'article_translation'
id = sa.Column(sa.Integer, primary_key=True)
locale = sa.Column(sa.String(10), primary_key=True)
title = sa.Column(sa.String(100))
is_published = sa.Column(sa.Boolean, index=True)
is_deleted = sa.Column(sa.Boolean, unique=True)
is_archived = sa.Column(sa.Boolean)
__table_args__ = (
sa.Index('my_index', is_archived, is_published, unique=True),
)
return ArticleTranslation.__table__
def test_primary_key(self, articles):
assert has_unique_index(articles.c.id)
def test_column_of_aliased_table(self, articles):
alias = sa.orm.aliased(articles)
with pytest.raises(TypeError):
assert has_unique_index(alias.c.id)
def test_unique_index(self, article_translations):
assert has_unique_index(article_translations.c.is_deleted)
def test_compound_primary_key(self, article_translations):
assert not has_unique_index(article_translations.c.id)
assert not has_unique_index(article_translations.c.locale)
def test_single_column_index(self, article_translations):
assert not has_unique_index(article_translations.c.is_published)
def test_compound_column_unique_index(self, article_translations):
assert not has_unique_index(article_translations.c.is_published)
assert not has_unique_index(article_translations.c.is_archived)
class TestHasUniqueIndexWithFKConstraint:
def test_composite_fk_without_index(self, Base):
class User(Base):
__tablename__ = 'user'
first_name = sa.Column(sa.Unicode(255), primary_key=True)
last_name = sa.Column(sa.Unicode(255), primary_key=True)
class Article(Base):
__tablename__ = 'article'
id = sa.Column(sa.Integer, primary_key=True)
author_first_name = sa.Column(sa.Unicode(255))
author_last_name = sa.Column(sa.Unicode(255))
__table_args__ = (
sa.ForeignKeyConstraint(
[author_first_name, author_last_name],
[User.first_name, User.last_name]
),
)
table = Article.__table__
constraint = get_fk_constraint_for_columns(
table,
table.c.author_first_name,
table.c.author_last_name
)
assert not has_unique_index(constraint)
def test_composite_fk_with_index(self, Base):
class User(Base):
__tablename__ = 'user'
first_name = sa.Column(sa.Unicode(255), primary_key=True)
last_name = sa.Column(sa.Unicode(255), primary_key=True)
class Article(Base):
__tablename__ = 'article'
id = sa.Column(sa.Integer, primary_key=True)
author_first_name = sa.Column(sa.Unicode(255))
author_last_name = sa.Column(sa.Unicode(255))
__table_args__ = (
sa.ForeignKeyConstraint(
[author_first_name, author_last_name],
[User.first_name, User.last_name]
),
sa.Index(
'my_index',
author_first_name,
author_last_name,
unique=True
)
)
table = Article.__table__
constraint = get_fk_constraint_for_columns(
table,
table.c.author_first_name,
table.c.author_last_name
)
assert has_unique_index(constraint)
def test_composite_fk_with_partial_index_match(self, Base):
class User(Base):
__tablename__ = 'user'
first_name = sa.Column(sa.Unicode(255), primary_key=True)
last_name = sa.Column(sa.Unicode(255), primary_key=True)
class Article(Base):
__tablename__ = 'article'
id = sa.Column(sa.Integer, primary_key=True)
author_first_name = sa.Column(sa.Unicode(255))
author_last_name = sa.Column(sa.Unicode(255))
__table_args__ = (
sa.ForeignKeyConstraint(
[author_first_name, author_last_name],
[User.first_name, User.last_name]
),
sa.Index(
'my_index',
author_first_name,
author_last_name,
id,
unique=True
)
)
table = Article.__table__
constraint = get_fk_constraint_for_columns(
table,
table.c.author_first_name,
table.c.author_last_name
)
assert not has_unique_index(constraint)
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