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# frozen_string_literal: true
class Shard < ActiveRecord::Base
# Store shard names from the configuration file in the database. This is not a
# list of active shards - we just want to assign an immutable, unique ID to
# every shard name for easy indexing / referencing.
def self.populate!
return unless table_exists?
# The GitLab config does not change for the lifecycle of the process
in_config = Gitlab.config.repositories.storages.keys.map(&:to_s)
in_db = all.pluck(:name)
# This may race with other processes creating shards at the same time, but
# `by_name` will handle that correctly
missing = in_config - in_db
missing.map { |name| by_name(name) }
end
def self.by_name(name)
find_or_create_by(name: name)
rescue ActiveRecord::RecordNotUnique
retry
end
end
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