airbnb/caravel

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#
#   http://www.apache.org/licenses/LICENSE-2.0
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"""adding slug to dash

Revision ID: 1a48a5411020
Revises: 289ce07647b
Create Date: 2015-12-04 09:42:16.973264

"""

# revision identifiers, used by Alembic.
revision = "1a48a5411020"
down_revision = "289ce07647b"

import sqlalchemy as sa  # noqa: E402
from alembic import op  # noqa: E402


def upgrade():
    op.add_column("dashboards", sa.Column("slug", sa.String(length=255), nullable=True))
    try:
        op.create_unique_constraint("idx_unique_slug", "dashboards", ["slug"])
    except:  # noqa: E722
        pass


def downgrade():
    op.drop_constraint(None, "dashboards", type_="unique")
    op.drop_column("dashboards", "slug")