The EntityManager is the representation of a PersistenceContext, allowing a user to manipulate data pulled from a database.
EntityManager.merge() can insert new objects and update existing ones. Why would one want to use persist() (which can only …
jpa merge entitymanager persist java-persistence-apiI have an EJB where I am saving an object to the database. In an example I have seen, once …
java jpa entitymanagerIs there a way to initialize the EntityManager without a persistence unit defined? Can you give all the required properties …
jpa runtime entitymanager persistence.xmlI am doing some CRUD operations using JPA. For updating an object which is the right way to do? Through …
java jpa entitymanager[Doctrine\ORM\ORMException] The EntityManager is closed. After I get a DBAL exception when inserting data, EntityManager closes and I'm …
symfony orm doctrine-orm entitymanagerI have a problem with Java Persistence API and Hibernate. My situation of project is: My persistence.xml file is: &…
eclipse hibernate jpa-2.0 entitymanagerI have a java EE project using JPA (transaction-type="JTA"), hibernate as provider. I write my beans to handle the …
jpa sql-delete entitymanager illegalargumentexceptionSo far, my preference has been to always use EntityManager's merge() take care of both insert and update. But I …
java jpa merge entitymanager persistWhat is the standard way to implement simple update? Example: we have User with phone number NNNNNN and now we …
java jpa entitymanagerGuys, simply put, I have a java application with a text output box. I'd like to query a Db and …
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