18943: add modified_at descending index

[arvados.git] / services / api / db / migrate / 20170706141334_json_collection_properties.rb

diff --git a/services/api/db/migrate/20170706141334_json_collection_properties.rb b/services/api/db/migrate/20170706141334_json_collection_properties.rb
index 35ee7eaf3ac2c977856dcf7a6146f03458550aa5..1c78b53be345d17ae7909a677513132fa33d27ac 100644 (file)
--- a/services/api/db/migrate/20170706141334_json_collection_properties.rb
+++ b/services/api/db/migrate/20170706141334_json_collection_properties.rb
@@ -1,8 +1,15 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 require './db/migrate/20161213172944_full_text_search_indexes'
 
-class JsonCollectionProperties < ActiveRecord::Migration
+class JsonCollectionProperties < ActiveRecord::Migration[4.2]
   def up
-    ActiveRecord::Base.connection.execute 'DROP INDEX collections_full_text_search_idx'
+    # Drop the FT index before changing column type to avoid
+    # "PG::DatatypeMismatch: ERROR: COALESCE types jsonb and text
+    # cannot be matched".
+    ActiveRecord::Base.connection.execute 'DROP INDEX IF EXISTS collections_full_text_search_idx'
     ActiveRecord::Base.connection.execute 'ALTER TABLE collections ALTER COLUMN properties TYPE jsonb USING properties::jsonb'
     FullTextSearchIndexes.new.replace_index('collections')
   end