1. Problem with duplicates using Grails' withCriteria function with a many-to-many relationship stackoverflow.com
I've got 2 tables, Question and Answer, with a many-to-many relationship (i.e. Questions can have multiple Answers and Answers can be reused by multiple Questions). For normalization, I have a cross-reference ...
2. Relationship one-to-one of 2 ways - duplicate Column forum.hibernate.org
3. One to many relationship problem: duplicate collection role forum.hibernate.org
4. Preventing Duplicates in one-to many relationship forum.hibernate.org
I have a single 'User' entity that is used with a unique 'one-to-many' relationship with many of my other entites. e.g: Code: