I\'m trying to run the code below, but I keep getting the error \"Cannot merge an entity that has been removed\".
I\'m tying to implement some tree-like structure with JPA. I have a \"folder\" entity and a \"test\" entity. Folder can contain both folders and tests. Test doesnt contains anything.
I can\'t understand why NHibernate is inserting a child entity without the foreign key of the parent.
Starting to use Nhibernate for persistency being seduced by the promise that it respects your domain model, I tried to implement a relation manager for my domain objects. Basically, to DRY my code wit
I\'m having bit complicated object model that forms a triangle. There is User entity that has collections of Items and Taxonomies. Item has a taxonomy, too. And for convenience, I wanted Item and Taxo
I want to model the relationship between two entities, a group开发者_开发百科 and an account with JPA/Hibernate. An account can have several groups, but not vice versa, so we have a OneToMany relation
What would my statement be to insert \"Arnold Schwarzenegger\" and \"Hasta la vista baby\" into the following empty SQL tables?
I\'m building a Django application that uses MongoDB and MongoEngine to store data. To present a simplified version of my problem, say I want to have two classes: User and Page. Each page should assoc
i have entity A that has-a 开发者_运维问答B entity, and B has-a A with @OneToOne bidirectional association.
This question is about a specific UML diagram in the book called Patterns Of Enterprise Application Architecture, by Martin Fowler.
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