lists: add migration for encoding

migrations/versions/9f5525e84960_add_encoding_for_distribution_list.py

@@ -0,0 +1,36 @@
+"""add encoding for distribution list
+
+Revision ID: 9f5525e84960
+Revises: 6f3e327e3b87
+Create Date: 2022-05-16 17:03:40.367755
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '9f5525e84960'
+down_revision = '6f3e327e3b87'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('mirror_list', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('encoding', sa.String(length=20), nullable=True))
+
+    with op.batch_alter_table('mirror_list', schema=None) as batch_op:
+        batch_op.execute("UPDATE mirror_list SET encoding = 'json'")
+        batch_op.alter_column('encoding', nullable=False)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('mirror_list', schema=None) as batch_op:
+        batch_op.drop_column('encoding')
+
+    # ### end Alembic commands ###