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  • entityManager

    ScenarioEntityManager.persistEntityManager.mergeSessionManager.saveOrUpdate
    Object passed was never persisted 1. Object added to persistence context as new entity
    2. New entity inserted into database at flush/commit
    1. State copied to new entity.
    2. New entity added to persistence context
    3. New entity inserted into database at flush/commit
    4. New entity returned
    1. Object added to persistence context as new entity
    2. New entity inserted into database at flush/commit
    Object was previously persisted, but not loaded in this persistence context 1. EntityExistsException thrown (or a PersistenceException at flush/commit) 2. Existing entity loaded.
    2. State copied from object to loaded entity
    3. Loaded entity updated in database at flush/commit
    4. Loaded entity returned
    1. Object added to persistence context
    2. Loaded entity updated in database at flush/commit
    Object was previously persisted and already loaded in this persistence context 1. EntityExistsException thrown (or a PersistenceException at flush or commit time) 1. State from object copied to loaded entity
    2. Loaded entity updated in database at flush/commit
    3. Loaded entity returned
    1. NonUniqueObjectExceptionthrown
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  • 原文地址:https://www.cnblogs.com/javaleon/p/4015357.html
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