CODEWITHSUNDEEP
springspring-data-jpa
Trts
Trts

Reputation: 1069

Clash of methods when implementing Spring JPA

spring-boot-starter-parent 2.3.2.RELEASE

I'm trying to access the dababase like in this tutorial:

https://spring.io/guides/gs/accessing-data-jpa/#_create_simple_queries

This is my repository:

package ru.pcask.clients.repositories;
import ru.pcask.clients.entities.Client;
import org.springframework.data.repository.CrudRepository;

public interface ClientRepository extends CrudRepository<Client, Long> {
    Client findById(Long id);
}

And the error:

'findById(Long)' in 'ru.pcask.clients.repositories.ClientRepository' clashes with 'findById(ID)' in 'org.springframework.data.repository.CrudRepository'; attempting to use incompatible return type

But I get errors like in the screenshot.

enter image description here

Upvotes: 0

Views: 837

Answers (1)

Felix Seifert
Felix Seifert

Reputation: 602

The issue is your return type. As mentioned above, the method findById(Long id) is already implemented in the CrudReposistory<T, ID> and it returns an Optional<T>.

You can either remove the method in your code because it is already there or override it with the correct return type Optional<Client>.

Upvotes: 2

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