Spring 数据 jdbc 拼写

Question

I tried to play with spring data jdbc after several month of spring data mongodb and jpa... And my surprise... I don't find my favorite function easily: Example, Predicate, Spel...

So, at this time, I tried to have a @query working with spel... and I have a doubt... it exists????

2020-06-25 18:45:47.566 ERROR [,,,] 15472 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: No value supplied for the SQL parameter '#{#query.lastname}': No value registered for key '#{#query.lastname}'] with root cause

org.springframework.dao.InvalidDataAccessApiUsageException: No value supplied for the SQL parameter '#{#query.lastname}': No value registered for key '#{#query.lastname}'

My request is very simple:

 public interface UserRepository extends PagingAndSortingRepository<User, Long> {

    User findByLastname(String lastname);

    @Query("select * from USER where lastname= :#{#query.lastname} and firstname= :#{#query.firstname} and age=:#{#query.age}")
    Page<User> findBySearchUserQuery(@Param("query") SearchUserQuery query, Pageable page);

}

Thx for your help, regards Nico

Answer 1

As of now Spring (until Spring Data JDBC 2.1) @Query supports only named parameters, no support using SPEL in @Query. The simplest solution will be providing all parameters to query methods.

@Query("select u from USER as u where u.lastname= :lastname and u.firstname= :firstname and u.age=:age")
Page<User> findBySearchUserQueryParams(String firstname, String lastname, int age, Pageable page);

Spring data jdbc reference document

Answer 2

You should not write [*] in the query but name the class as some name and return it

your query will be something like this

 @Query("select u from USER as u where u.lastname= :#{#query.lastname} and u.firstname= :#{#query.firstname} and u.age=:#{#query.age}")
    Page<User> findBySearchUserQuery(@Param("query") SearchUserQuery query, Pageable page);