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