33 lines
1.4 KiB
Ruby
33 lines
1.4 KiB
Ruby
#
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# Copyright (C) 2013 - 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 AddSchemaMigrationsPrimaryKey < ActiveRecord::Migration[4.2]
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tag :postdeploy
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def self.up
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# Rails 5 creates the schema_migrations table with a primary key in the first place;
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# so no need to convert it over
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return unless index_exists?(:schema_migrations, :version, name: 'unique_schema_migrations')
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execute("ALTER TABLE #{connection.quote_table_name('schema_migrations')} ADD CONSTRAINT schema_migrations_pkey PRIMARY KEY USING INDEX unique_schema_migrations")
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end
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def self.down
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execute("ALTER TABLE #{connection.quote_table_name('schema_migrations')} DROP CONSTRAINT schema_migrations_pkey")
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add_index :schema_migrations, :version, :unique => true, :name => 'unique_schema_migrations'
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end
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end
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