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from tests import op_fixture, assert_raises_message
from alembic import op, util
from sqlalchemy import Integer, Column, ForeignKey, \
UniqueConstraint, Table, MetaData, String
from sqlalchemy.sql import table
def test_rename_column():
context = op_fixture('mysql')
op.alter_column('t1', 'c1', name="c2", existing_type=Integer)
context.assert_(
'ALTER TABLE t1 CHANGE c1 c2 INTEGER NULL'
)
def test_rename_column_serv_default():
context = op_fixture('mysql')
op.alter_column('t1', 'c1', name="c2", existing_type=Integer, existing_server_default="q")
context.assert_(
"ALTER TABLE t1 CHANGE c1 c2 INTEGER NULL DEFAULT 'q'"
)
def test_col_nullable():
context = op_fixture('mysql')
op.alter_column('t1', 'c1', nullable=False, existing_type=Integer)
context.assert_(
'ALTER TABLE t1 CHANGE c1 c1 INTEGER NOT NULL'
)
def test_col_multi_alter():
context = op_fixture('mysql')
op.alter_column('t1', 'c1', nullable=False, server_default="q", type_=Integer)
context.assert_(
"ALTER TABLE t1 CHANGE c1 c1 INTEGER NOT NULL DEFAULT 'q'"
)
def test_col_alter_type_required():
context = op_fixture('mysql')
assert_raises_message(
util.CommandError,
"All MySQL ALTER COLUMN operations require the existing type.",
op.alter_column, 't1', 'c1', nullable=False, server_default="q"
)
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