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# frozen_string_literal: true
module Gitlab
module Database
BINARY_TYPE =
if Gitlab::Database.postgresql?
# PostgreSQL defines its own class with slightly different
# behaviour from the default Binary type.
ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Bytea
else
# In Rails 5.0 `Type` has been moved from `ActiveRecord` to `ActiveModel`
# https://github.com/rails/rails/commit/9cc8c6f3730df3d94c81a55be9ee1b7b4ffd29f6#diff-f8ba7983a51d687976e115adcd95822b
# Remove this method and leave just `ActiveModel::Type::Binary` when removing Gitlab.rails5? code.
if Gitlab.rails5?
ActiveModel::Type::Binary
else
ActiveRecord::Type::Binary
end
end
# Class for casting binary data to hexadecimal SHA1 hashes (and vice-versa).
#
# Using ShaAttribute allows you to store SHA1 values as binary while still
# using them as if they were stored as string values. This gives you the
# ease of use of string values, but without the storage overhead.
class ShaAttribute < BINARY_TYPE
PACK_FORMAT = 'H*'.freeze
# It is called from activerecord-4.2.10/lib/active_record internal methods.
# Remove this method when removing Gitlab.rails5? code.
def type_cast_from_database(value)
unpack_sha(super)
end
# It is called from activerecord-4.2.10/lib/active_record internal methods.
# Remove this method when removing Gitlab.rails5? code.
def type_cast_for_database(value)
serialize(value)
end
# It is called from activerecord-5.0.6/lib/active_record/attribute.rb
# Remove this method when removing Gitlab.rails5? code..
def deserialize(value)
value = Gitlab.rails5? ? super : method(:type_cast_from_database).super_method.call(value)
unpack_sha(value)
end
# Rename this method to `deserialize(value)` removing Gitlab.rails5? code.
# Casts binary data to a SHA1 in hexadecimal.
def unpack_sha(value)
# Uncomment this line when removing Gitlab.rails5? code.
# value = super
value ? value.unpack(PACK_FORMAT)[0] : nil
end
# Casts a SHA1 in hexadecimal to the proper binary format.
def serialize(value)
arg = value ? [value].pack(PACK_FORMAT) : nil
Gitlab.rails5? ? super(arg) : method(:type_cast_for_database).super_method.call(arg)
end
end
end
end
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