40 lines
1.7 KiB
Ruby
40 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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# Copyright (C) 2021 - 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 EnsureDummyEnrollmentTerm < ActiveRecord::Migration[6.0]
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tag :predeploy
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def up
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# if a dummy course already exists, it will reference an enrollment term
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# belonging to a dummy root account, whose id is _not_ 0. we're going to change
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# that ID, but we don't want postgres to whine about the broken FK. we'll also
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# fix the FK, but it doesn't happen in the same statement
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fk_name = connection.foreign_key_for(:courses, to_table: :enrollment_terms).name
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table = connection.quote_table_name("courses")
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execute("ALTER TABLE #{table} ALTER CONSTRAINT #{connection.quote_column_name(fk_name)} DEFERRABLE")
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defer_constraints(fk_name) do
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# find a pre-existing one referencing the dummy root account, and make it the dummy
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EnrollmentTerm.where(root_account_id: 0).update_all(id: 0)
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EnrollmentTerm.ensure_dummy_enrollment_term
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# fix any dummy courses already created
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Course.where(id: 0).update_all(enrollment_term_id: 0)
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end
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end
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end
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