Category: return only a single Category object since category is unique

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/java/com/fjordtek/bookstore/model/book/CategoryRepository.java

@@ -2,8 +2,6 @@
 
 package com.fjordtek.bookstore.model.book;
 
-import java.util.List;
-
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.query.Param;
 import org.springframework.data.rest.core.annotation.RepositoryRestResource;
@@ -26,9 +24,9 @@ import org.springframework.data.rest.core.annotation.RestResource;
 public interface CategoryRepository extends CrudRepository<Category, Long> {
 
 	@RestResource(exported = false)
-	List<Category> findByName(@Param("name") String name);
+	Category findByName(@Param("name") String name);
 
 	@RestResource(path = "category", rel = "category")
-	List<Category> findByNameIgnoreCaseContaining(@Param("name") String name);
+	Category findByNameIgnoreCaseContaining(@Param("name") String name);
 
 }