powerdns-admin/migrations/versions/31a4ed468b18_remove_all_settings_in_the_db.py

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"""Remove all setting in the DB
Revision ID: 31a4ed468b18
Revises: 4a666113c7bb
Create Date: 2018-08-21 17:12:30.058782
"""
from alembic import op
import sqlalchemy as sa
# revision identifiers, used by Alembic.
revision = '31a4ed468b18'
down_revision = '4a666113c7bb'
branch_labels = None
depends_on = None
def upgrade():
# delete all settings from "setting" table.
# PDA should work without initial settings in the DB
# Once user change the settings from UI, they will be
# written to the DB.
op.execute("DELETE FROM setting")
with op.batch_alter_table('setting') as batch_op:
# drop view column since we don't need it
batch_op.drop_column('view')
def downgrade():
with op.batch_alter_table('setting') as batch_op:
batch_op.add_column(sa.Column('view', sa.String(length=64), nullable=True))