Class: Gitlab::BackgroundMigration::MigrateFingerprintSha256WithinKeys

Inherits:
Object
  • Object
show all
Defined in:
lib/gitlab/background_migration/migrate_fingerprint_sha256_within_keys.rb

Overview

This class is responsible to update all sha256 fingerprints within the keys table

Defined Under Namespace

Classes: Key

Constant Summary collapse

TEMP_TABLE = 
'tmp_fingerprint_sha256_migration'

Instance Method Summary collapse

Instance Method Details

#perform(start_id, stop_id) ⇒ Object 


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# File 'lib/gitlab/background_migration/migrate_fingerprint_sha256_within_keys.rb', line 17

def perform(start_id, stop_id)
  ActiveRecord::Base.transaction do
    execute(<<~SQL)
      CREATE TEMPORARY TABLE #{TEMP_TABLE}
        (id bigint primary key, fingerprint_sha256 bytea not null)
        ON COMMIT DROP
    SQL

    fingerprints = []
    Key.where(id: start_id..stop_id, fingerprint_sha256: nil).find_each do |regular_key|
      if fingerprint = generate_ssh_public_key(regular_key.key)
        bytea = ActiveRecord::Base.connection.escape_bytea(Base64.decode64(fingerprint))

        fingerprints << {
          id: regular_key.id,
          fingerprint_sha256: bytea
        }
      end
    end

    Gitlab::Database.bulk_insert(TEMP_TABLE, fingerprints) # rubocop:disable Gitlab/BulkInsert

    execute("ANALYZE #{TEMP_TABLE}")

    execute(<<~SQL)
      UPDATE keys
        SET fingerprint_sha256 = t.fingerprint_sha256
        FROM #{TEMP_TABLE} t
        WHERE keys.id = t.id
    SQL
  end
end