Add default columns to the configuration table

core/admin/migrations/versions/f1393877871d_.py

@@ -0,0 +1,28 @@
+""" Add default columns to the configuration table
+
+Revision ID: f1393877871d
+Revises: 546b04c886f0
+Create Date: 2018-12-09 16:15:42.317104
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'f1393877871d'
+down_revision = '546b04c886f0'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    with op.batch_alter_table('config') as batch_op:
+        batch_op.add_column(sa.Column('comment', sa.String(length=255), nullable=True))
+        batch_op.add_column(sa.Column('created_at', sa.Date(), nullable=False, server_default='1900-01-01'))
+        batch_op.add_column(sa.Column('updated_at', sa.Date(), nullable=True))
+
+
+def downgrade():
+    with op.batch_alter_table('config') as batch_op:
+        batch_op.drop_column('updated_at')
+        batch_op.drop_column('created_at')
+        batch_op.drop_column('comment')