66 lines
2.8 KiB
Ruby
66 lines
2.8 KiB
Ruby
#
|
|
# Copyright (C) 2014 - present Instructure, Inc.
|
|
#
|
|
# This file is part of Canvas.
|
|
#
|
|
# Canvas is free software: you can redistribute it and/or modify it under
|
|
# the terms of the GNU Affero General Public License as published by the Free
|
|
# Software Foundation, version 3 of the License.
|
|
#
|
|
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
|
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
|
|
# details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License along
|
|
# with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
class AddUniqueIndexOnEnrollments < ActiveRecord::Migration[4.2]
|
|
tag :postdeploy
|
|
disable_ddl_transaction!
|
|
|
|
def self.up
|
|
DataFixup::RemoveDuplicateEnrollments.run
|
|
if connection.adapter_name == 'PostgreSQL'
|
|
add_index :enrollments,
|
|
[:user_id, :type, :role_name, :course_section_id, :associated_user_id],
|
|
where: "associated_user_id IS NOT NULL AND role_name IS NOT NULL",
|
|
name: 'index_enrollments_on_user_type_role_section_associated_user',
|
|
unique: true,
|
|
algorithm: :concurrently
|
|
add_index :enrollments,
|
|
[:user_id, :type, :role_name, :course_section_id],
|
|
where: "role_name IS NOT NULL AND associated_user_id IS NULL ",
|
|
name: 'index_enrollments_on_user_type_role_section',
|
|
unique: true,
|
|
algorithm: :concurrently
|
|
add_index :enrollments,
|
|
[:user_id, :type, :course_section_id, :associated_user_id],
|
|
where: "associated_user_id IS NOT NULL AND role_name IS NULL",
|
|
name: 'index_enrollments_on_user_type_section_associated_user',
|
|
unique: true,
|
|
algorithm: :concurrently
|
|
add_index :enrollments,
|
|
[:user_id, :type, :course_section_id],
|
|
where: "associated_user_id IS NULL AND role_name IS NULL",
|
|
unique: true,
|
|
algorithm: :concurrently
|
|
else
|
|
add_index :enrollments,
|
|
[:user_id, :type, :role_name, :course_section_id, :associated_user_id],
|
|
name: 'index_enrollments_on_user_type_role_section_associated_user',
|
|
unique: true,
|
|
algorithm: :concurrently
|
|
end
|
|
end
|
|
|
|
def self.down
|
|
remove_index :enrollments, name: 'index_enrollments_on_user_type_role_section_associated_user'
|
|
if connection.adapter_name == 'PostgreSQL'
|
|
remove_index :enrollments, name: 'index_enrollments_on_user_type_role_section'
|
|
remove_index :enrollments, name: 'index_enrollments_on_user_type_section_associated_user'
|
|
remove_index :enrollments, [:user_id, :type, :course_section_id]
|
|
end
|
|
end
|
|
end
|