Add topic searching and topic discarding

migrations/versions/a791b9b74a4c_.py

@@ -0,0 +1,23 @@
+"""empty message
+
+Revision ID: a791b9b74a4c
+Revises: 44e138485931
+Create Date: 2018-12-23 23:52:02.010281
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'a791b9b74a4c'
+down_revision = '44e138485931'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column('forum_topic', sa.Column('discarded', sa.Boolean(), server_default='0', nullable=True))
+
+def downgrade():
+    op.drop_column('forum_topic', 'discarded')