如何在spring repository中嵌入實體的值後進行搜索？

Question

我有作者的嵌入式（@ManyToOne）的實體書和我使用的庫依作者的姓名搜索一本書：

公共接口BookRepository擴展CrudRepository {

//@Query("SELECT b from Book b INNER JOIN b.author a WHERE a.lastname = ?#{[0]}") 
public Iterable<Book> findByAuthorLastname(String lastname); 

我與我的自定義都嘗試查詢和沒有它。它爲什麼會失敗？

實體：

@Entity 
@Table(name = "BOOK") 
public class Book { 

@ManyToOne 
@JoinColumn(name = "AUTHOR_ID") 
private Author author; 

// other fields, getters and setters 

} 

@Entity 
@Table(name = "AUTHOR") 
public class Author { 

@Column(name = "LASTNAME") 
private String lastname; 

@OneToMany(cascade = CascadeType.ALL, mappedBy = "author") 
List<Book> books = new ArrayList<Book>(); 

// other fields, getters and setters 
} 

Answer 1

你已經失敗了，因爲，你讓外地authorLastName搜索。對於複雜的查詢，您應該使用註釋@Query。