IT Nursery
The question is in the title. Below I just described some of my thoughts and findings. When I had a very simple domain model (3 tables without any relations),...
I use Spring boot+JPA and having a problem while starting the service. Caused by: java.lang.IllegalArgumentException: Not an managed type: class com.nervytech.dialer.domain.PhoneSettings at org.hibernate.jpa.internal.metamodel.MetamodelImpl.managedType(MetamodelImpl.java:219) at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:68) at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getMetadata(JpaEntityInformationSupport.java:65) at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:145)...
What is the smartest way to get an entity with a field of type List persisted? Command.java package persistlistofstring; import java.io.Serializable; import java.util.ArrayList; import java.util.List; import javax.persistence.Basic; import javax.persistence.Entity;...
I have a Java bean. Now, I want to be sure that the field should be unique. I am using the following code: @UniqueConstraint(columnNames={"username"}) public String username; But I’m...
I am new to hibernate and need to use one-to-many and many-to-one relations. It is a bi-directional relationship in my objects, so that I can traverse from either direction....
I am using Spring JPA to perform all database operations. However I don’t know how to select specific columns from a table in Spring JPA? For example: SELECT projectId,...
I am a little confused about the JPA 2.0 orphanRemoval attribute. I think I can see it is needed when I use my JPA provider’s DB generation tools to...
I’m looking for the different ways to map an enum using JPA. I especially want to set the integer value of each enum entry and to save only the...
This question already has answers here: What is the easiest way to ignore a JPA field during persistence? (10 answers) Closed 5 years ago. I thought hibernate takes into...
I am using JPA in my project. I came to a query in which I need to make join operation on five tables. So I created a native query...