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MS-SQL has no native Enum-type support and therefore needs to work with constraints. Since these constraints need unique names the suggested approach referenced in the following alembic documentation has been applied: http://bit.ly/2x9r8pb ASTERISK-27255 #close Change-Id: I8b579750dae0c549f1103ee50172644afb9b2f95
35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
"""symmetric_transport
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Revision ID: f638dbe2eb23
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Revises: 15db7b91a97a
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Create Date: 2017-03-09 09:38:59.513479
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"""
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# revision identifiers, used by Alembic.
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revision = 'f638dbe2eb23'
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down_revision = '15db7b91a97a'
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from alembic import op
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import sqlalchemy as sa
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from sqlalchemy.dialects.postgresql import ENUM
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YESNO_NAME = 'yesno_values'
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YESNO_VALUES = ['yes', 'no']
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def upgrade():
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############################# Enums ##############################
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# yesno_values have already been created, so use postgres enum object
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# type to get around "already created" issue - works okay with mysql
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yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
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op.add_column('ps_transports', sa.Column('symmetric_transport', yesno_values))
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op.add_column('ps_subscription_persistence', sa.Column('contact_uri', sa.String(256)))
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def downgrade():
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op.drop_column('ps_subscription_persistence', 'contact_uri')
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if op.get_context().bind.dialect.name == 'mssql':
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op.drop_constraint('ck_ps_transports_symmetric_transport_yesno_values','ps_transports')
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op.drop_column('ps_transports', 'symmetric_transport')
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