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from sqlalchemy.testing.requirements import Requirements
from alembic import util
from alembic.util import sqla_compat
from ..testing import exclusions
class SuiteRequirements(Requirements):
@property
def schemas(self):
"""Target database must support external schemas, and have one
named 'test_schema'."""
return exclusions.open()
@property
def autocommit_isolation(self):
"""target database should support 'AUTOCOMMIT' isolation level"""
return exclusions.closed()
@property
def materialized_views(self):
"""needed for sqlalchemy compat"""
return exclusions.closed()
@property
def unique_constraint_reflection(self):
def doesnt_have_check_uq_constraints(config):
from sqlalchemy import inspect
insp = inspect(config.db)
try:
insp.get_unique_constraints("x")
except NotImplementedError:
return True
except TypeError:
return True
except Exception:
pass
return False
return exclusions.skip_if(doesnt_have_check_uq_constraints)
@property
def sequences(self):
"""Target database must support SEQUENCEs."""
return exclusions.only_if(
[lambda config: config.db.dialect.supports_sequences],
"no sequence support",
)
@property
def foreign_key_match(self):
return exclusions.open()
@property
def foreign_key_constraint_reflection(self):
return exclusions.open()
@property
def check_constraints_w_enforcement(self):
"""Target database must support check constraints
and also enforce them."""
return exclusions.open()
@property
def reflects_pk_names(self):
return exclusions.closed()
@property
def reflects_fk_options(self):
return exclusions.closed()
@property
def sqlalchemy_14(self):
return exclusions.skip_if(
lambda config: not util.sqla_14,
"SQLAlchemy 1.4 or greater required",
)
@property
def sqlalchemy_1x(self):
return exclusions.skip_if(
lambda config: util.sqla_2,
"SQLAlchemy 1.x test",
)
@property
def sqlalchemy_2(self):
return exclusions.skip_if(
lambda config: not util.sqla_2,
"SQLAlchemy 2.x test",
)
@property
def asyncio(self):
def go(config):
try:
import greenlet # noqa: F401
except ImportError:
return False
else:
return True
return self.sqlalchemy_14 + exclusions.only_if(go)
@property
def comments(self):
return exclusions.only_if(
lambda config: config.db.dialect.supports_comments
)
@property
def alter_column(self):
return exclusions.open()
@property
def computed_columns(self):
return exclusions.closed()
@property
def computed_columns_api(self):
return exclusions.only_if(
exclusions.BooleanPredicate(sqla_compat.has_computed)
)
@property
def computed_reflects_normally(self):
return exclusions.only_if(
exclusions.BooleanPredicate(sqla_compat.has_computed_reflection)
)
@property
def computed_reflects_as_server_default(self):
return exclusions.closed()
@property
def computed_doesnt_reflect_as_server_default(self):
return exclusions.closed()
@property
def autoincrement_on_composite_pk(self):
return exclusions.closed()
@property
def fk_ondelete_is_reflected(self):
return exclusions.closed()
@property
def fk_onupdate_is_reflected(self):
return exclusions.closed()
@property
def fk_onupdate(self):
return exclusions.open()
@property
def fk_ondelete_restrict(self):
return exclusions.open()
@property
def fk_onupdate_restrict(self):
return exclusions.open()
@property
def fk_ondelete_noaction(self):
return exclusions.open()
@property
def fk_initially(self):
return exclusions.closed()
@property
def fk_deferrable(self):
return exclusions.closed()
@property
def fk_deferrable_is_reflected(self):
return exclusions.closed()
@property
def fk_names(self):
return exclusions.open()
@property
def integer_subtype_comparisons(self):
return exclusions.open()
@property
def no_name_normalize(self):
return exclusions.skip_if(
lambda config: config.db.dialect.requires_name_normalize
)
@property
def identity_columns(self):
return exclusions.closed()
@property
def identity_columns_alter(self):
return exclusions.closed()
@property
def identity_columns_api(self):
return exclusions.only_if(
exclusions.BooleanPredicate(sqla_compat.has_identity)
)
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