"""empty message

Revision ID: 0061_add_client_reference
Revises: 0060_add_letter_template_type
Create Date: 2016-11-17 13:19:25.820617

"""

# revision identifiers, used by Alembic.
revision = "0061_add_client_reference"
down_revision = "0060_add_letter_template_type"

from alembic import op
import sqlalchemy as sa


def upgrade():
    op.add_column(
        "notifications",
        sa.Column("client_reference", sa.String(), index=True, nullable=True),
    )
    op.add_column(
        "notification_history",
        sa.Column("client_reference", sa.String(), nullable=True),
    )


def downgrade():
    op.drop_column("notifications", "client_reference")
    op.drop_column("notification_history", "client_reference")