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class FixProjectRecordsWithInvalidVisibility < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
BATCH_SIZE = 500
DOWNTIME = false
# This migration is idempotent and there's no sense in throwing away the
# partial result if it's interrupted
disable_ddl_transaction!
def up
projects = Arel::Table.new(:projects)
namespaces = Arel::Table.new(:namespaces)
finder_sql =
projects
.join(namespaces, Arel::Nodes::InnerJoin)
.on(projects[:namespace_id].eq(namespaces[:id]))
.where(projects[:visibility_level].gt(namespaces[:visibility_level]))
.project(projects[:id], namespaces[:visibility_level])
.take(BATCH_SIZE)
.to_sql
# Update matching rows in batches. Each batch can cause up to 3 UPDATE
# statements, in addition to the SELECT: one per visibility_level
loop do
to_update = connection.exec_query(finder_sql)
break if to_update.rows.count == 0
# row[0] is projects.id, row[1] is namespaces.visibility_level
updates = to_update.rows.each_with_object(Hash.new {|h, k| h[k] = [] }) do |row, obj|
obj[row[1]] << row[0]
end
updates.each do |visibility_level, project_ids|
updater = Arel::UpdateManager.new(ActiveRecord::Base)
.table(projects)
.set(projects[:visibility_level] => visibility_level)
.where(projects[:id].in(project_ids))
ActiveRecord::Base.connection.exec_update(updater.to_sql, self.class.name, [])
end
end
end
def down
# no-op
end
end
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