獲取「org.h2.jdbc.JdbcSQLException：未找到表」BOOK_PUBLISHERS「; SQL語句：」

Question

使用Spring Boot，使用Spring Data JPA和H2內存數據庫獲取映射多對多關係的過程。

我有兩個表與實體書&出版商。他們在多對多關係中運送

創建加入表以將Book_Id和Publisher_id作爲外鍵存儲在book_publisher表中，如下所示。

create table book_publisher 
(
    book_id number not null, 
    publisher_id number not null, 
    PRIMARY KEY (book_id, publisher_id), 
    CONSTRAINT fk_bookpublisher_book FOREIGN KEY (book_id) REFERENCES CURRENCY (id) ON DELETE CASCADE ON UPDATE CASCADE, 
    CONSTRAINT fk_bookpublisher_publisher FOREIGN KEY (publisher_id) REFERENCES VENUE (id) ON DELETE CASCADE ON UPDATE CASCADE 
); 

不是我寫的book_publisher表域類。

但我正在逐漸：

org.h2.jdbc.JdbcSQLException：表 「BOOK_PUBLISHERS」 找不到; SQL 聲明：插入book_publisher（book_id，PUBLISHER_ID）值 [42102-191]「，而議會書的對象（這裏的書類有 發行對象爲 」SET「 變量

如何（？，？）解決這個錯誤？

Answer 1

如果你正在運行你提到的創建腳本，它會在CURRENCY和VENUE表之間創建一個many_to_many關係，所以我想說你分享的代碼片段是錯誤的，這可能是爲什麼表BOOK_PUBLISHER未創建成功

正確的SQL cod e創建many_to_many關係（表BOOK和PUBLISHER之間）應該是：

create table book_publisher 
(
    book_id number not null, 
    publisher_id number not null, 
    PRIMARY KEY (book_id, publisher_id), 
    CONSTRAINT fk_bookpublisher_book FOREIGN KEY (book_id) REFERENCES BOOK (id) ON DELETE CASCADE ON UPDATE CASCADE, 
    CONSTRAINT fk_bookpublisher_publisher FOREIGN KEY (publisher_id) REFERENCES PUBLISHER (id) ON DELETE CASCADE ON UPDATE CASCADE 
);