シーケンスの代わりにuuidをIDとして使う
stop using numbers as IDs. just use UUIDs. seriously — Postgres: The Bits You Haven’t Found by pvh UUID の違い v1 Generate a UUID from a host ID, sequence number, and the current time. v3 Generate a UUID from the MD5 hash of a namespace UUID and a name. v4 Generate a random UUID v5 Generate a UUID from the SHA-1 hash of a namespace UUID and a name. この内、ID として利用できるのは v1 と v4 の2つ。v1 は最後 48 ビットがハード固有のノー
How do I create a GUID / UUID?
How do I create GUIDs (globally-unique identifiers) in JavaScript? The GUID / UUID should be at least 32 characters and should stay in the ASCII range to avoid trouble when passing them around. I'm not sure what routines are available on all browsers, how "random" and seeded the built-in random number generator is, etc.
UUID generate UUIDs (or GUIDs) in Java
Generate UUIDs (or GUIDs) in Java This is an implementation of the UUIDs and GUIDs specification in Java. UUIDs are 128 bit long identifiers that are guaranteed to be unique. Download The current version is UUID-3.0. Documentation A UUID (or GUID) is a unique identifier that can be created whithout a central authority. UUIDs can be used if a sequence number is not good enough. Thi
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