How to write Spring Data method name to retrieve all elements in a column?

Question

Suppose I have the class: ``` @Entity public class Bean { @Id private String beanId; //other fields & setters and getters } ``` And the corresponding Spring Data JPA repository, where I want to have in a `List` all the `beanIds`. ``` @RepositoryDefinition(domainClass = Bean.class, idClass = String.class) public interface BeanRepository { @Query("select b.beanId from Bean b") List findAllBeanId(); } ``` As written above, everything works as expected; but this is a simple operation and I do not want to write a query explicitly. What should the name of the method be such that Spring Data can parse it and obtain the above mentioned query (or the same functionality). I have searched in both the reference documentation as two books I have on Spring Data. The above name (`findAllBeanId`) and others that I have tried (`findBeanId`, `findBeanBeanId` etc.) throw the following exception as root cause: ``` org.springframework.data.mapping.PropertyReferenceException: No property fi…

Accepted Answer

In the Spring docs: http://static.springsource.org/spring-data/jpa/docs/1.3.0.RELEASE/reference/html/jpa.repositories.html there is nothing about getting only particular column/property from entity by query generated from method name. So I think that currently it is not possible.

How to write Spring Data method name to retrieve all elements in a column?

Solution

Problem