services/api/db/migrate/20161213172944_full_text_search_indexes.rb

   1 # Copyright (C) The Arvados Authors. All rights reserved.
   2 #
   3 # SPDX-License-Identifier: AGPL-3.0
   4
   5 class FullTextSearchIndexes < ActiveRecord::Migration[4.2]
   6   def fts_indexes
   7     {
   8       "collections" => "collections_full_text_search_idx",
   9       "container_requests" => "container_requests_full_text_search_idx",
  10       "groups" => "groups_full_text_search_idx",
  11       "jobs" => "jobs_full_text_search_idx",
  12       "pipeline_instances" => "pipeline_instances_full_text_search_idx",
  13       "pipeline_templates" => "pipeline_templates_full_text_search_idx",
  14       "workflows" => "workflows_full_text_search_idx",
  15     }
  16   end
  17
  18   def replace_index(t)
  19     i = fts_indexes[t]
  20     t.classify.constantize.reset_column_information
  21     execute "DROP INDEX IF EXISTS #{i}"
  22     execute "CREATE INDEX #{i} ON #{t} USING gin(#{t.classify.constantize.full_text_tsvector})"
  23   end
  24
  25   def up
  26     # remove existing fts indexes and create up to date ones with no
  27     # leading space
  28     fts_indexes.keys.each do |t|
  29       replace_index(t)
  30     end
  31   end
  32
  33   def down
  34     fts_indexes.each do |t, i|
  35       remove_index t.to_sym, :name => i
  36     end
  37   end
  38 end