update migration file

app/dashboard/views/newsletter.py

@@ -0,0 +1,6 @@
+from app.dashboard.base import dashboard_bp
+
+
+@dashboard_bp.route("/", methods=["GET", "POST"])
+def notification_setting():
+    pass

migrations/versions/2019_123000_a8b996f0be40_.py

@@ -0,0 +1,29 @@
+"""empty message
+
+Revision ID: a8b996f0be40
+Revises: 696e17c13b8b
+Create Date: 2019-12-30 00:22:25.114359
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'a8b996f0be40'
+down_revision = '696e17c13b8b'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('users', sa.Column('notification', sa.Boolean(), server_default='1', nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('users', 'notification')
+    # ### end Alembic commands ###