e3603758ef
* This change also requires that submissions in our test need to have a valid study group.
45 lines
1.7 KiB
Ruby
45 lines
1.7 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class UnifyLtiParameters < ActiveRecord::Migration[7.0]
|
|
def change
|
|
reversible do |dir|
|
|
dir.up do
|
|
# We cannot add a foreign key to a table that has rows that violate the constraint.
|
|
LtiParameter.where(external_users_id: nil)
|
|
.or(LtiParameter.where.not(external_users_id: ExternalUser.all.select(:id)))
|
|
.or(LtiParameter.where(exercises_id: nil))
|
|
.or(LtiParameter.where.not(exercises_id: Exercise.all.select(:id)))
|
|
.delete_all
|
|
|
|
# For each user/exercise pair, keep the most recent LtiParameter.
|
|
LtiParameter.all.group(:external_users_id, :exercises_id).having('count(*) > 1').count.each do |ids, count|
|
|
LtiParameter.where(external_users_id: ids.first, exercises_id: ids.second).order(updated_at: :asc).limit(count - 1).delete_all
|
|
end
|
|
change_column :lti_parameters, :id, :bigint
|
|
end
|
|
|
|
dir.down do
|
|
change_column :lti_parameters, :id, :integer
|
|
end
|
|
end
|
|
|
|
remove_column :lti_parameters, :consumers_id, :bigint
|
|
|
|
rename_column :lti_parameters, :external_users_id, :external_user_id
|
|
change_column_null :lti_parameters, :external_user_id, false
|
|
add_foreign_key :lti_parameters, :external_users
|
|
|
|
rename_column :lti_parameters, :exercises_id, :exercise_id
|
|
change_column_null :lti_parameters, :exercise_id, false
|
|
add_foreign_key :lti_parameters, :exercises
|
|
|
|
add_index :lti_parameters, %i[external_user_id study_group_id exercise_id], unique: true, name: 'index_lti_params_on_external_user_and_study_group_and_exercise'
|
|
end
|
|
|
|
class LtiParameter < ActiveRecord::Base; end
|
|
|
|
class ExternalUser < ActiveRecord::Base; end
|
|
|
|
class Exercise < ActiveRecord::Base; end
|
|
end
|