"""Enable PostGIS

Revision ID: 4ef20b76cab1
Revises: 55004b0f00d6
Create Date: 2015-02-11 20:49:42.303864

"""

# revision identifiers, used by Alembic.
revision = '4ef20b76cab1'
down_revision = '55004b0f00d6'

from alembic import op
import sqlalchemy as sa


def upgrade():
    op.execute("CREATE EXTENSION postgis;")
    op.execute("CREATE EXTENSION postgis_topology;")

def downgrade():
    op.execute("DROP EXTENSION postgis_topology;")
    op.execute("DROP EXTENSION postgis;")

"""Enable PostGIS

Revision ID: 4ef20b76cab1
Revises: 55004b0f00d6
Create Date: 2015-02-11 20:49:42.303864

"""

# revision identifiers, used by Alembic.
revision = '4ef20b76cab1'
down_revision = '55004b0f00d6'

from alembic import op
import sqlalchemy as sa


def upgrade():
    op.execute("CREATE EXTENSION IF NOT EXISTS postgis;")
    op.execute("CREATE EXTENSION IF NOT EXISTS postgis_topology;")

def downgrade():
    op.execute("DROP EXTENSION IF EXISTS postgis_topology;")
    op.execute("DROP EXTENSION IF EXISTS postgis;")

Add extra code to PostGIS migration to only create extensions if they're not already there. Drop on rollback only if extensions exist.
Add extra code to PostGIS migration to only create extensions if they're not already there. Drop on rollback only if extensions exist.
