Databases
StackOverflow2013
Postsdbo
PO
 

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  1. PO
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    <p>You have to refersh entity which was returned by <code>entityManager.merge()</code> method, something like:</p> <pre><code>@Override public void refreshCollection(List&lt;T&gt; entityCollection){ for(T entity: entityCollection){ if(!this.getEntityManager().contains(entity)){ this.getEntityManager().refresh(this.getEntityManager().merge(entity)); } } } </code></pre> <p>This way you should get rid of <code>javax.ejb.EJBTransactionRolledbackException: Entity not managed</code> exception.</p> <p><strong>UPDATE</strong></p> <p>Maybe it's safer to return new collection:</p> <pre><code>public List&lt;T&gt; refreshCollection(List&lt;T&gt; entityCollection) { List&lt;T&gt; result = new ArrayList&lt;T&gt;(); if (entityCollection != null &amp;&amp; !entityCollection.isEmpty()) { getEntityManager().getEntityManagerFactory().getCache().evict(entityCollection.get(0).getClass()); T mergedEntity; for (T entity : entityCollection) { mergedEntity = entityManager.merge(entity); getEntityManager().refresh(mergedEntity); result.add(mergedEntity); } } return result; } </code></pre> <p>or you can be more effective if you can access entity IDs like this:</p> <pre><code>public List&lt;T&gt; refreshCollection(List&lt;T&gt; entityCollection) { List&lt;T&gt; result = new ArrayList&lt;T&gt;(); T mergedEntity; for (T entity : entityCollection) { getEntityManager().getEntityManagerFactory().getCache().evict(entity.getClass(), entity.getId()); result.add(getEntityManager().find(entity.getClass(), entity.getId())); } return result; } </code></pre>
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    1. POForce refresh of collection JPA entityManager
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      1. PTQuestion
    1. PTAnswer
    1. USOndrej Bozek
    1. USOndrej Bozek
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    1. COI tried this and it does prevent the exception but does not give me the updated entities from the database
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      1. USDaveB
    2. COI have updated my answer.
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      1. USOndrej Bozek
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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