from sqlalchemy.test.testing import assert_raises, assert_raises_message import pickle from sqlalchemy import Integer, String, UniqueConstraint, \ CheckConstraint, ForeignKey, MetaData, Sequence, \ ForeignKeyConstraint, ColumnDefault from sqlalchemy.test.schema import Table, Column from sqlalchemy import schema, exc import sqlalchemy as tsa from sqlalchemy.test import TestBase, ComparesTables, \ AssertsCompiledSQL, testing, engines from sqlalchemy.test.testing import eq_ class MetaDataTest(TestBase, ComparesTables): def test_metadata_connect(self): metadata = MetaData() t1 = Table('table1', metadata, Column('col1', Integer, primary_key=True), Column('col2', String(20))) metadata.bind = testing.db metadata.create_all() try: assert t1.count().scalar() == 0 finally: metadata.drop_all() def test_metadata_contains(self): metadata = MetaData() t1 = Table('t1', metadata, Column('x', Integer)) t2 = Table('t2', metadata, Column('x', Integer), schema='foo') t3 = Table('t2', MetaData(), Column('x', Integer)) t4 = Table('t1', MetaData(), Column('x', Integer), schema='foo') assert "t1" in metadata assert "foo.t2" in metadata assert "t2" not in metadata assert "foo.t1" not in metadata assert t1 in metadata assert t2 in metadata assert t3 not in metadata assert t4 not in metadata def test_uninitialized_column_copy(self): for col in [ Column('foo', String(), nullable=False), Column('baz', String(), unique=True), Column(Integer(), primary_key=True), Column('bar', Integer(), Sequence('foo_seq'), primary_key=True, key='bar'), Column(Integer(), ForeignKey('bat.blah')), Column('bar', Integer(), ForeignKey('bat.blah'), primary_key=True, key='bar'), ]: c2 = col.copy() for attr in ('name', 'type', 'nullable', 'primary_key', 'key', 'unique'): eq_(getattr(col, attr), getattr(c2, attr)) eq_(len(col.foreign_keys), len(c2.foreign_keys)) if col.default: eq_(c2.default.name, 'foo_seq') for a1, a2 in zip(col.foreign_keys, c2.foreign_keys): assert a1 is not a2 eq_(a2._colspec, 'bat.blah') def test_uninitialized_column_copy_events(self): msgs = [] def write(t, c): msgs.append("attach %s.%s" % (t.name, c.name)) c1 = Column('foo', String()) c1._on_table_attach(write) m = MetaData() for i in xrange(3): cx = c1.copy() t = Table('foo%d' % i, m, cx) eq_(msgs, ['attach foo0.foo', 'attach foo1.foo', 'attach foo2.foo']) def test_dupe_tables(self): metadata = MetaData() t1 = Table('table1', metadata, Column('col1', Integer, primary_key=True), Column('col2', String(20))) metadata.bind = testing.db metadata.create_all() try: try: t1 = Table('table1', metadata, autoload=True) t2 = Table('table1', metadata, Column('col1', Integer, primary_key=True), Column('col2', String(20))) assert False except tsa.exc.InvalidRequestError, e: assert str(e) \ == "Table 'table1' is already defined for this "\ "MetaData instance. Specify 'useexisting=True' "\ "to redefine options and columns on an existing "\ "Table object." finally: metadata.drop_all() def test_fk_copy(self): c1 = Column('foo', Integer) c2 = Column('bar', Integer) m = MetaData() t1 = Table('t', m, c1, c2) kw = dict(onupdate="X", ondelete="Y", use_alter=True, name='f1', deferrable="Z", initially="Q", link_to_name=True) fk1 = ForeignKey(c1, **kw) fk2 = ForeignKeyConstraint((c1,), (c2,), **kw) t1.append_constraint(fk2) fk1c = fk1.copy() fk2c = fk2.copy() for k in kw: eq_(getattr(fk1c, k), kw[k]) eq_(getattr(fk2c, k), kw[k]) def test_fk_construct(self): c1 = Column('foo', Integer) c2 = Column('bar', Integer) m = MetaData() t1 = Table('t', m, c1, c2) fk1 = ForeignKeyConstraint(('foo', ), ('bar', ), table=t1) assert fk1 in t1.constraints @testing.exclude('mysql', '<', (4, 1, 1), 'early types are squirrely') def test_to_metadata(self): meta = MetaData() table = Table('mytable', meta, Column('myid', Integer, Sequence('foo_id_seq'), primary_key=True), Column('name', String(40), nullable=True), Column('foo', String(40), nullable=False, server_default='x', server_onupdate='q'), Column('bar', String(40), nullable=False, default='y', onupdate='z'), Column('description', String(30), CheckConstraint("description='hi'")), UniqueConstraint('name'), test_needs_fk=True, ) table2 = Table('othertable', meta, Column('id', Integer, Sequence('foo_seq'), primary_key=True), Column('myid', Integer, ForeignKey('mytable.myid'), ), test_needs_fk=True, ) def test_to_metadata(): meta2 = MetaData() table_c = table.tometadata(meta2) table2_c = table2.tometadata(meta2) return (table_c, table2_c) def test_pickle(): meta.bind = testing.db meta2 = pickle.loads(pickle.dumps(meta)) assert meta2.bind is None meta3 = pickle.loads(pickle.dumps(meta2)) return (meta2.tables['mytable'], meta2.tables['othertable']) def test_pickle_via_reflect(): # this is the most common use case, pickling the results of a # database reflection meta2 = MetaData(bind=testing.db) t1 = Table('mytable', meta2, autoload=True) t2 = Table('othertable', meta2, autoload=True) meta3 = pickle.loads(pickle.dumps(meta2)) assert meta3.bind is None assert meta3.tables['mytable'] is not t1 return (meta3.tables['mytable'], meta3.tables['othertable']) meta.create_all(testing.db) try: for test, has_constraints, reflect in (test_to_metadata, True, False), (test_pickle, True, False), \ (test_pickle_via_reflect, False, True): table_c, table2_c = test() self.assert_tables_equal(table, table_c) self.assert_tables_equal(table2, table2_c) assert table is not table_c assert table.primary_key is not table_c.primary_key assert list(table2_c.c.myid.foreign_keys)[0].column \ is table_c.c.myid assert list(table2_c.c.myid.foreign_keys)[0].column \ is not table.c.myid assert 'x' in str(table_c.c.foo.server_default.arg) if not reflect: assert isinstance(table_c.c.myid.default, Sequence) assert str(table_c.c.foo.server_onupdate.arg) == 'q' assert str(table_c.c.bar.default.arg) == 'y' assert getattr(table_c.c.bar.onupdate.arg, 'arg', table_c.c.bar.onupdate.arg) == 'z' assert isinstance(table2_c.c.id.default, Sequence) # constraints dont get reflected for any dialect right # now if has_constraints: for c in table_c.c.description.constraints: if isinstance(c, CheckConstraint): break else: assert False assert str(c.sqltext) == "description='hi'" for c in table_c.constraints: if isinstance(c, UniqueConstraint): break else: assert False assert c.columns.contains_column(table_c.c.name) assert not c.columns.contains_column(table.c.name) finally: meta.drop_all(testing.db) def test_tometadata_with_schema(self): meta = MetaData() table = Table('mytable', meta, Column('myid', Integer, primary_key=True), Column('name', String(40), nullable=True), Column('description', String(30), CheckConstraint("description='hi'")), UniqueConstraint('name'), test_needs_fk=True, ) table2 = Table('othertable', meta, Column('id', Integer, primary_key=True), Column('myid', Integer, ForeignKey('mytable.myid')), test_needs_fk=True, ) meta2 = MetaData() table_c = table.tometadata(meta2, schema='someschema') table2_c = table2.tometadata(meta2, schema='someschema') eq_(str(table_c.join(table2_c).onclause), str(table_c.c.myid == table2_c.c.myid)) eq_(str(table_c.join(table2_c).onclause), 'someschema.mytable.myid = someschema.othertable.myid') def test_tometadata_default_schema(self): meta = MetaData() table = Table('mytable', meta, Column('myid', Integer, primary_key=True), Column('name', String(40), nullable=True), Column('description', String(30), CheckConstraint("description='hi'")), UniqueConstraint('name'), test_needs_fk=True, schema='myschema', ) table2 = Table('othertable', meta, Column('id', Integer, primary_key=True), Column('myid', Integer, ForeignKey('myschema.mytable.myid')), test_needs_fk=True, schema='myschema', ) meta2 = MetaData() table_c = table.tometadata(meta2) table2_c = table2.tometadata(meta2) eq_(str(table_c.join(table2_c).onclause), str(table_c.c.myid == table2_c.c.myid)) eq_(str(table_c.join(table2_c).onclause), 'myschema.mytable.myid = myschema.othertable.myid') def test_manual_dependencies(self): meta = MetaData() a = Table('a', meta, Column('foo', Integer)) b = Table('b', meta, Column('foo', Integer)) c = Table('c', meta, Column('foo', Integer)) d = Table('d', meta, Column('foo', Integer)) e = Table('e', meta, Column('foo', Integer)) e.add_is_dependent_on(c) a.add_is_dependent_on(b) b.add_is_dependent_on(d) e.add_is_dependent_on(b) c.add_is_dependent_on(a) eq_( meta.sorted_tables, [d, b, a, c, e] ) def test_tometadata_strip_schema(self): meta = MetaData() table = Table('mytable', meta, Column('myid', Integer, primary_key=True), Column('name', String(40), nullable=True), Column('description', String(30), CheckConstraint("description='hi'")), UniqueConstraint('name'), test_needs_fk=True, ) table2 = Table('othertable', meta, Column('id', Integer, primary_key=True), Column('myid', Integer, ForeignKey('mytable.myid')), test_needs_fk=True, ) meta2 = MetaData() table_c = table.tometadata(meta2, schema=None) table2_c = table2.tometadata(meta2, schema=None) eq_(str(table_c.join(table2_c).onclause), str(table_c.c.myid == table2_c.c.myid)) eq_(str(table_c.join(table2_c).onclause), 'mytable.myid = othertable.myid') def test_nonexistent(self): assert_raises(tsa.exc.NoSuchTableError, Table, 'fake_table', MetaData(testing.db), autoload=True) class TableOptionsTest(TestBase, AssertsCompiledSQL): def test_prefixes(self): table1 = Table("temporary_table_1", MetaData(), Column("col1", Integer), prefixes = ["TEMPORARY"]) self.assert_compile( schema.CreateTable(table1), "CREATE TEMPORARY TABLE temporary_table_1 (col1 INTEGER)" ) table2 = Table("temporary_table_2", MetaData(), Column("col1", Integer), prefixes = ["VIRTUAL"]) self.assert_compile( schema.CreateTable(table2), "CREATE VIRTUAL TABLE temporary_table_2 (col1 INTEGER)" ) def test_table_info(self): metadata = MetaData() t1 = Table('foo', metadata, info={'x':'y'}) t2 = Table('bar', metadata, info={}) t3 = Table('bat', metadata) assert t1.info == {'x':'y'} assert t2.info == {} assert t3.info == {} for t in (t1, t2, t3): t.info['bar'] = 'zip' assert t.info['bar'] == 'zip'