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432 lines
16 KiB
Python
432 lines
16 KiB
Python
from __future__ import with_statement
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import sqlalchemy as sa
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from sqlalchemy import exc as sa_exc
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from sqlalchemy import types as sql_types
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from sqlalchemy import inspect
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from sqlalchemy import MetaData, Integer, String
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from sqlalchemy.engine.reflection import Inspector
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from sqlalchemy.testing import engines, fixtures
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from sqlalchemy.testing.schema import Table, Column
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from sqlalchemy.testing import eq_, assert_raises_message
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from sqlalchemy import testing
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from .. import config
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from sqlalchemy.schema import DDL, Index
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from sqlalchemy import event
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metadata, users = None, None
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class HasTableTest(fixtures.TablesTest):
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@classmethod
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def define_tables(cls, metadata):
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Table('test_table', metadata,
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Column('id', Integer, primary_key=True),
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Column('data', String(50))
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)
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def test_has_table(self):
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with config.db.begin() as conn:
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assert config.db.dialect.has_table(conn, "test_table")
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assert not config.db.dialect.has_table(conn, "nonexistent_table")
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class ComponentReflectionTest(fixtures.TablesTest):
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run_inserts = run_deletes = None
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@classmethod
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def define_tables(cls, metadata):
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cls.define_reflected_tables(metadata, None)
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if testing.requires.schemas.enabled:
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cls.define_reflected_tables(metadata, "test_schema")
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@classmethod
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def define_reflected_tables(cls, metadata, schema):
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if schema:
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schema_prefix = schema + "."
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else:
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schema_prefix = ""
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if testing.requires.self_referential_foreign_keys.enabled:
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users = Table('users', metadata,
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Column('user_id', sa.INT, primary_key=True),
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Column('test1', sa.CHAR(5), nullable=False),
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Column('test2', sa.Float(5), nullable=False),
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Column('parent_user_id', sa.Integer,
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sa.ForeignKey('%susers.user_id' % schema_prefix)),
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schema=schema,
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test_needs_fk=True,
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)
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else:
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users = Table('users', metadata,
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Column('user_id', sa.INT, primary_key=True),
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Column('test1', sa.CHAR(5), nullable=False),
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Column('test2', sa.Float(5), nullable=False),
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schema=schema,
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test_needs_fk=True,
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)
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Table("dingalings", metadata,
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Column('dingaling_id', sa.Integer, primary_key=True),
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Column('address_id', sa.Integer,
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sa.ForeignKey('%semail_addresses.address_id' %
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schema_prefix)),
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Column('data', sa.String(30)),
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schema=schema,
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test_needs_fk=True,
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)
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Table('email_addresses', metadata,
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Column('address_id', sa.Integer),
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Column('remote_user_id', sa.Integer,
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sa.ForeignKey(users.c.user_id)),
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Column('email_address', sa.String(20)),
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sa.PrimaryKeyConstraint('address_id', name='email_ad_pk'),
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schema=schema,
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test_needs_fk=True,
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)
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if testing.requires.index_reflection.enabled:
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cls.define_index(metadata, users)
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if testing.requires.view_reflection.enabled:
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cls.define_views(metadata, schema)
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@classmethod
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def define_index(cls, metadata, users):
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Index("users_t_idx", users.c.test1, users.c.test2)
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Index("users_all_idx", users.c.user_id, users.c.test2, users.c.test1)
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@classmethod
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def define_views(cls, metadata, schema):
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for table_name in ('users', 'email_addresses'):
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fullname = table_name
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if schema:
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fullname = "%s.%s" % (schema, table_name)
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view_name = fullname + '_v'
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query = "CREATE VIEW %s AS SELECT * FROM %s" % (
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view_name, fullname)
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event.listen(
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metadata,
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"after_create",
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DDL(query)
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)
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event.listen(
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metadata,
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"before_drop",
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DDL("DROP VIEW %s" % view_name)
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)
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@testing.requires.schema_reflection
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def test_get_schema_names(self):
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insp = inspect(testing.db)
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self.assert_('test_schema' in insp.get_schema_names())
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@testing.requires.schema_reflection
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def test_dialect_initialize(self):
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engine = engines.testing_engine()
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assert not hasattr(engine.dialect, 'default_schema_name')
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inspect(engine)
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assert hasattr(engine.dialect, 'default_schema_name')
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@testing.requires.schema_reflection
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def test_get_default_schema_name(self):
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insp = inspect(testing.db)
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eq_(insp.default_schema_name, testing.db.dialect.default_schema_name)
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@testing.provide_metadata
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def _test_get_table_names(self, schema=None, table_type='table',
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order_by=None):
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meta = self.metadata
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users, addresses, dingalings = self.tables.users, \
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self.tables.email_addresses, self.tables.dingalings
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insp = inspect(meta.bind)
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if table_type == 'view':
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table_names = insp.get_view_names(schema)
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table_names.sort()
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answer = ['email_addresses_v', 'users_v']
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else:
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table_names = insp.get_table_names(schema,
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order_by=order_by)
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if order_by == 'foreign_key':
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answer = ['users', 'email_addresses', 'dingalings']
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eq_(table_names, answer)
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else:
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answer = ['dingalings', 'email_addresses', 'users']
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eq_(sorted(table_names), answer)
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@testing.requires.table_reflection
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def test_get_table_names(self):
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self._test_get_table_names()
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@testing.requires.table_reflection
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@testing.requires.foreign_key_constraint_reflection
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def test_get_table_names_fks(self):
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self._test_get_table_names(order_by='foreign_key')
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@testing.requires.table_reflection
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@testing.requires.schemas
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def test_get_table_names_with_schema(self):
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self._test_get_table_names('test_schema')
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@testing.requires.view_reflection
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def test_get_view_names(self):
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self._test_get_table_names(table_type='view')
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@testing.requires.view_reflection
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@testing.requires.schemas
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def test_get_view_names_with_schema(self):
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self._test_get_table_names('test_schema', table_type='view')
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def _test_get_columns(self, schema=None, table_type='table'):
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meta = MetaData(testing.db)
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users, addresses, dingalings = self.tables.users, \
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self.tables.email_addresses, self.tables.dingalings
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table_names = ['users', 'email_addresses']
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if table_type == 'view':
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table_names = ['users_v', 'email_addresses_v']
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insp = inspect(meta.bind)
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for table_name, table in zip(table_names, (users,
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addresses)):
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schema_name = schema
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cols = insp.get_columns(table_name, schema=schema_name)
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self.assert_(len(cols) > 0, len(cols))
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# should be in order
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for i, col in enumerate(table.columns):
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eq_(col.name, cols[i]['name'])
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ctype = cols[i]['type'].__class__
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ctype_def = col.type
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if isinstance(ctype_def, sa.types.TypeEngine):
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ctype_def = ctype_def.__class__
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# Oracle returns Date for DateTime.
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if testing.against('oracle') and ctype_def \
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in (sql_types.Date, sql_types.DateTime):
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ctype_def = sql_types.Date
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# assert that the desired type and return type share
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# a base within one of the generic types.
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self.assert_(len(set(ctype.__mro__).
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intersection(ctype_def.__mro__).intersection([
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sql_types.Integer,
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sql_types.Numeric,
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sql_types.DateTime,
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sql_types.Date,
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sql_types.Time,
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sql_types.String,
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sql_types._Binary,
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])) > 0, '%s(%s), %s(%s)' % (col.name,
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col.type, cols[i]['name'], ctype))
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if not col.primary_key:
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assert cols[i]['default'] is None
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@testing.requires.table_reflection
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def test_get_columns(self):
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self._test_get_columns()
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@testing.requires.table_reflection
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@testing.requires.schemas
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def test_get_columns_with_schema(self):
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self._test_get_columns(schema='test_schema')
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@testing.requires.view_reflection
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def test_get_view_columns(self):
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self._test_get_columns(table_type='view')
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@testing.requires.view_reflection
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@testing.requires.schemas
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def test_get_view_columns_with_schema(self):
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self._test_get_columns(schema='test_schema', table_type='view')
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@testing.provide_metadata
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def _test_get_pk_constraint(self, schema=None):
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meta = self.metadata
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users, addresses = self.tables.users, self.tables.email_addresses
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insp = inspect(meta.bind)
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users_cons = insp.get_pk_constraint(users.name, schema=schema)
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users_pkeys = users_cons['constrained_columns']
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eq_(users_pkeys, ['user_id'])
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addr_cons = insp.get_pk_constraint(addresses.name, schema=schema)
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addr_pkeys = addr_cons['constrained_columns']
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eq_(addr_pkeys, ['address_id'])
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with testing.requires.reflects_pk_names.fail_if():
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eq_(addr_cons['name'], 'email_ad_pk')
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@testing.requires.primary_key_constraint_reflection
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def test_get_pk_constraint(self):
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self._test_get_pk_constraint()
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@testing.requires.table_reflection
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@testing.requires.primary_key_constraint_reflection
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@testing.requires.schemas
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def test_get_pk_constraint_with_schema(self):
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self._test_get_pk_constraint(schema='test_schema')
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@testing.requires.table_reflection
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@testing.provide_metadata
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def test_deprecated_get_primary_keys(self):
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meta = self.metadata
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users = self.tables.users
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insp = Inspector(meta.bind)
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assert_raises_message(
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sa_exc.SADeprecationWarning,
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"Call to deprecated method get_primary_keys."
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" Use get_pk_constraint instead.",
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insp.get_primary_keys, users.name
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)
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@testing.provide_metadata
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def _test_get_foreign_keys(self, schema=None):
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meta = self.metadata
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users, addresses, dingalings = self.tables.users, \
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self.tables.email_addresses, self.tables.dingalings
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insp = inspect(meta.bind)
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expected_schema = schema
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# users
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users_fkeys = insp.get_foreign_keys(users.name,
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schema=schema)
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fkey1 = users_fkeys[0]
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with testing.requires.named_constraints.fail_if():
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self.assert_(fkey1['name'] is not None)
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eq_(fkey1['referred_schema'], expected_schema)
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eq_(fkey1['referred_table'], users.name)
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eq_(fkey1['referred_columns'], ['user_id', ])
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if testing.requires.self_referential_foreign_keys.enabled:
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eq_(fkey1['constrained_columns'], ['parent_user_id'])
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#addresses
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addr_fkeys = insp.get_foreign_keys(addresses.name,
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schema=schema)
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fkey1 = addr_fkeys[0]
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with testing.requires.named_constraints.fail_if():
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self.assert_(fkey1['name'] is not None)
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eq_(fkey1['referred_schema'], expected_schema)
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eq_(fkey1['referred_table'], users.name)
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eq_(fkey1['referred_columns'], ['user_id', ])
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eq_(fkey1['constrained_columns'], ['remote_user_id'])
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@testing.requires.foreign_key_constraint_reflection
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def test_get_foreign_keys(self):
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self._test_get_foreign_keys()
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@testing.requires.foreign_key_constraint_reflection
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@testing.requires.schemas
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def test_get_foreign_keys_with_schema(self):
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self._test_get_foreign_keys(schema='test_schema')
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@testing.provide_metadata
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def _test_get_indexes(self, schema=None):
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meta = self.metadata
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users, addresses, dingalings = self.tables.users, \
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self.tables.email_addresses, self.tables.dingalings
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# The database may decide to create indexes for foreign keys, etc.
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# so there may be more indexes than expected.
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insp = inspect(meta.bind)
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indexes = insp.get_indexes('users', schema=schema)
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expected_indexes = [
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{'unique': False,
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'column_names': ['test1', 'test2'],
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'name': 'users_t_idx'},
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{'unique': False,
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'column_names': ['user_id', 'test2', 'test1'],
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'name': 'users_all_idx'}
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]
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index_names = [d['name'] for d in indexes]
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for e_index in expected_indexes:
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assert e_index['name'] in index_names
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index = indexes[index_names.index(e_index['name'])]
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for key in e_index:
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eq_(e_index[key], index[key])
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@testing.requires.index_reflection
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def test_get_indexes(self):
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self._test_get_indexes()
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@testing.requires.index_reflection
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@testing.requires.schemas
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def test_get_indexes_with_schema(self):
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self._test_get_indexes(schema='test_schema')
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@testing.provide_metadata
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def _test_get_view_definition(self, schema=None):
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meta = self.metadata
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users, addresses, dingalings = self.tables.users, \
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self.tables.email_addresses, self.tables.dingalings
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view_name1 = 'users_v'
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view_name2 = 'email_addresses_v'
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insp = inspect(meta.bind)
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v1 = insp.get_view_definition(view_name1, schema=schema)
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self.assert_(v1)
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v2 = insp.get_view_definition(view_name2, schema=schema)
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self.assert_(v2)
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@testing.requires.view_reflection
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def test_get_view_definition(self):
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self._test_get_view_definition()
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@testing.requires.view_reflection
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@testing.requires.schemas
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def test_get_view_definition_with_schema(self):
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self._test_get_view_definition(schema='test_schema')
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@testing.only_on("postgresql", "PG specific feature")
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@testing.provide_metadata
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def _test_get_table_oid(self, table_name, schema=None):
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meta = self.metadata
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users, addresses, dingalings = self.tables.users, \
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self.tables.email_addresses, self.tables.dingalings
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insp = inspect(meta.bind)
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oid = insp.get_table_oid(table_name, schema)
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self.assert_(isinstance(oid, (int, long)))
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def test_get_table_oid(self):
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self._test_get_table_oid('users')
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@testing.requires.schemas
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def test_get_table_oid_with_schema(self):
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self._test_get_table_oid('users', schema='test_schema')
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@testing.provide_metadata
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def test_autoincrement_col(self):
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"""test that 'autoincrement' is reflected according to sqla's policy.
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Don't mark this test as unsupported for any backend !
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(technically it fails with MySQL InnoDB since "id" comes before "id2")
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A backend is better off not returning "autoincrement" at all,
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instead of potentially returning "False" for an auto-incrementing
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primary key column.
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"""
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meta = self.metadata
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insp = inspect(meta.bind)
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for tname, cname in [
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('users', 'user_id'),
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('email_addresses', 'address_id'),
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('dingalings', 'dingaling_id'),
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]:
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cols = insp.get_columns(tname)
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id_ = dict((c['name'], c) for c in cols)[cname]
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assert id_.get('autoincrement', True)
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__all__ = ('ComponentReflectionTest', 'HasTableTest')
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