discourse/db/migrate/20140808051823_create_topic...

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class CreateTopicSearchIndex < ActiveRecord::Migration[4.2]
def up
# used for similarity search
create_table :topic_search_data, id: false do |t|
t.integer :topic_id, null: false, primary_key: true
t.text :raw_data
t.string :locale, null: false
t.tsvector :search_data
end
execute "CREATE INDEX idx_search_topic ON topic_search_data USING gin (search_data)"
end
def down
drop_table :topic_search_data
end
end