# greatghoul/validates_nested_uniqueness

> Allows you to add a uniqueness constraint on an attribute so that when the model is on the other side of a has_many relationship the uniqueness will be respected (in nested circumstances).  Rails built-in uniqueness works by issuing an SQL query so in memory objects are not validated properly.

- **Canonical URL**: https://githubrepo.cloud/repo/greatghoul/validates_nested_uniqueness
- **GitHub Repository**: https://github.com/greatghoul/validates_nested_uniqueness
- **Maintainer / Creator**: https://github.com/greatghoul
- **Discovered On**: Nov 2, 2026

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