Add alt text support for attachments

alembic/versions/c9f204f5611d_alt_text_for_attachments.py

@@ -0,0 +1,32 @@
+"""Alt text for attachments
+
+Revision ID: c9f204f5611d
+Revises: 8ae9fc9ac88c
+Create Date: 2022-07-21 22:33:41.569754
+
+"""
+import sqlalchemy as sa
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = 'c9f204f5611d'
+down_revision = '8ae9fc9ac88c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('outbox_object_attachment', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('alt', sa.String(), nullable=True))
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('outbox_object_attachment', schema=None) as batch_op:
+        batch_op.drop_column('alt')
+
+    # ### end Alembic commands ###