48 lines
1.6 KiB
Ruby
48 lines
1.6 KiB
Ruby
#
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# Copyright (C) 2014 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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class AddLookupIndexToQuizQuestions < ActiveRecord::Migration[4.2]
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tag :predeploy
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disable_ddl_transaction!
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def up
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remove_index :quiz_questions, name: "index_quiz_questions_on_assessment_question_id"
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remove_index :quiz_questions, name: "index_quiz_questions_on_quiz_id"
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# we'll need the composite index when pulling questions out of a bank,
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# otherwise all queries use the quiz_id and would utilize this index
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add_index :quiz_questions, [ :quiz_id, :assessment_question_id ], {
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name: 'idx_qqs_on_quiz_and_aq_ids',
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algorithm: :concurrently
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}
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end
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def down
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add_index :quiz_questions, :assessment_question_id, {
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name: "index_quiz_questions_on_assessment_question_id",
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algorithm: :concurrently
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}
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add_index :quiz_questions, :quiz_id, {
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name: "index_quiz_questions_on_quiz_id",
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algorithm: :concurrently
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}
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remove_index :quiz_questions, :name => 'idx_qqs_on_quiz_and_aq_ids'
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end
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end
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