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from __future__ import with_statement
from tests import op_fixture, db_for_dialect, eq_, staging_env, \
clear_staging_env, _no_sql_testing_config,\
capture_context_buffer, requires_07, write_script
from unittest import TestCase
from sqlalchemy import DateTime, MetaData, Table, Column, text, Integer, String
from sqlalchemy.engine.reflection import Inspector
from alembic import command, util
from alembic.migration import MigrationContext
from alembic.script import ScriptDirectory
class PGOfflineEnumTest(TestCase):
@requires_07
def setUp(self):
env = staging_env()
self.cfg = cfg = _no_sql_testing_config()
self.rid = rid = util.rev_id()
self.script = script = ScriptDirectory.from_config(cfg)
script.generate_revision(rid, None, refresh=True)
def tearDown(self):
clear_staging_env()
def _inline_enum_script(self):
write_script(self.script, self.rid, """
revision = '%s'
down_revision = None
from alembic import op
from sqlalchemy.dialects.postgresql import ENUM
from sqlalchemy import Column
def upgrade():
op.create_table("sometable",
Column("data", ENUM("one", "two", "three", name="pgenum"))
)
def downgrade():
op.drop_table("sometable")
""" % self.rid)
def _distinct_enum_script(self):
write_script(self.script, self.rid, """
revision = '%s'
down_revision = None
from alembic import op
from sqlalchemy.dialects.postgresql import ENUM
from sqlalchemy import Column
def upgrade():
enum = ENUM("one", "two", "three", name="pgenum", create_type=False)
enum.create(op.get_bind(), checkfirst=False)
op.create_table("sometable",
Column("data", enum)
)
def downgrade():
op.drop_table("sometable")
ENUM(name="pgenum").drop(op.get_bind(), checkfirst=False)
""" % self.rid)
def test_offline_inline_enum_create(self):
self._inline_enum_script()
with capture_context_buffer() as buf:
command.upgrade(self.cfg, self.rid, sql=True)
assert "CREATE TYPE pgenum AS ENUM ('one','two','three')" in buf.getvalue()
assert "CREATE TABLE sometable (\n data pgenum\n)" in buf.getvalue()
def test_offline_inline_enum_drop(self):
self._inline_enum_script()
with capture_context_buffer() as buf:
command.downgrade(self.cfg, "%s:base" % self.rid, sql=True)
assert "DROP TABLE sometable" in buf.getvalue()
# no drop since we didn't emit events
assert "DROP TYPE pgenum" not in buf.getvalue()
def test_offline_distinct_enum_create(self):
self._distinct_enum_script()
with capture_context_buffer() as buf:
command.upgrade(self.cfg, self.rid, sql=True)
assert "CREATE TYPE pgenum AS ENUM ('one','two','three')" in buf.getvalue()
assert "CREATE TABLE sometable (\n data pgenum\n)" in buf.getvalue()
def test_offline_distinct_enum_drop(self):
self._distinct_enum_script()
with capture_context_buffer() as buf:
command.downgrade(self.cfg, "%s:base" % self.rid, sql=True)
assert "DROP TABLE sometable" in buf.getvalue()
assert "DROP TYPE pgenum" in buf.getvalue()
from alembic.migration import MigrationContext
from alembic.operations import Operations
from sqlalchemy.sql import table, column
class PostgresqlInlineLiteralTest(TestCase):
@classmethod
def setup_class(cls):
cls.bind = db_for_dialect("postgresql")
cls.bind.execute("""
create table tab (
col varchar(50)
)
""")
cls.bind.execute("""
insert into tab (col) values
('old data 1'),
('old data 2.1'),
('old data 3')
""")
@classmethod
def teardown_class(cls):
cls.bind.execute("drop table tab")
def setUp(self):
self.conn = self.bind.connect()
ctx = MigrationContext.configure(self.conn)
self.op = Operations(ctx)
def tearDown(self):
self.conn.close()
def test_inline_percent(self):
# TODO: here's the issue, you need to escape this.
tab = table('tab', column('col'))
self.op.execute(
tab.update().where(
tab.c.col.like(self.op.inline_literal('%.%'))
).values(col=self.op.inline_literal('new data')),
execution_options={'no_parameters':True}
)
eq_(
self.conn.execute("select count(*) from tab where col='new data'").scalar(),
1,
)
class PostgresqlDefaultCompareTest(TestCase):
@classmethod
def setup_class(cls):
cls.bind = db_for_dialect("postgresql")
staging_env()
context = MigrationContext.configure(
connection = cls.bind.connect(),
opts = {
'compare_type':True,
'compare_server_default':True
}
)
connection = context.bind
cls.autogen_context = {
'imports':set(),
'connection':connection,
'dialect':connection.dialect,
'context':context
}
@classmethod
def teardown_class(cls):
clear_staging_env()
def setUp(self):
self.metadata = MetaData(self.bind)
def tearDown(self):
self.metadata.drop_all()
def _compare_default_roundtrip(
self, type_, txt, alternate=None):
if alternate:
expected = True
else:
alternate = txt
expected = False
t = Table("test", self.metadata,
Column("somecol", type_, server_default=text(txt))
)
t2 = Table("test", MetaData(),
Column("somecol", type_, server_default=text(alternate))
)
assert self._compare_default(
t, t2, t2.c.somecol, alternate
) is expected
def _compare_default(
self,
t1, t2, col,
rendered
):
t1.create(self.bind)
insp = Inspector.from_engine(self.bind)
cols = insp.get_columns(t1.name)
ctx = self.autogen_context['context']
return ctx.impl.compare_server_default(
cols[0],
col,
rendered)
def test_compare_current_timestamp(self):
self._compare_default_roundtrip(
DateTime(),
"TIMEZONE('utc', CURRENT_TIMESTAMP)",
)
def test_compare_current_timestamp(self):
self._compare_default_roundtrip(
DateTime(),
"TIMEZONE('utc', CURRENT_TIMESTAMP)",
)
def test_compare_integer(self):
self._compare_default_roundtrip(
Integer(),
"5",
)
def test_compare_integer_diff(self):
self._compare_default_roundtrip(
Integer(),
"5", "7"
)
def test_compare_character_diff(self):
self._compare_default_roundtrip(
String(),
"'hello'",
"'there'"
)
def test_primary_key_skip(self):
"""Test that SERIAL cols are just skipped"""
t1 = Table("sometable", self.metadata,
Column("id", Integer, primary_key=True)
)
t2 = Table("sometable", MetaData(),
Column("id", Integer, primary_key=True)
)
assert not self._compare_default(
t1, t2, t2.c.id, ""
)
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