Add migration script

migrations/versions/2020_041320_57ef03f3ac34_.py

@@ -0,0 +1,29 @@
+"""empty message
+
+Revision ID: 57ef03f3ac34
+Revises: bfd7b2302903
+Create Date: 2020-04-13 20:49:01.061974
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '57ef03f3ac34'
+down_revision = 'bfd7b2302903'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('manual_subscription', sa.Column('is_giveaway', sa.Boolean(), server_default='0', nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('manual_subscription', 'is_giveaway')
+    # ### end Alembic commands ###