Mysql “如何修复”；java.sql.SQLException:Column'；id'；找不到。”；Spring启动中的错误

有两个实体：牌组和牌。每个牌组包含100张可能的牌中的8张。由于每个牌组包含多张牌，并且该牌也可以是许多不同牌组的一部分，因此我通过创建一个名为Deck_cards的新表来加入它们

@Data
@Entity
@Table(name = "cards")
public class Card {
    @Id
    private Integer id;

    @NotBlank
    private String icon;

    @NotBlank
    private String name;

    @ManyToMany(fetch = FetchType.LAZY,
                cascade = {
                    CascadeType.PERSIST,
                    CascadeType.MERGE
                },
                mappedBy = "cards")
    private Set<Deck> decks;
// setters and getters
}

@Data
@Entity
@Table(name="decks")
public class Deck {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @ManyToMany(fetch = FetchType.LAZY,
                cascade = {
                    CascadeType.PERSIST,
                    CascadeType.MERGE
                })
    @JoinTable(name = "deck_cards",
            joinColumns = { @JoinColumn(name = "deck_id", 
referencedColumnName = "id")},
            inverseJoinColumns = { @JoinColumn(name = "card_id", 
referencedColumnName = "id")})
    private Set<Card> cards = new HashSet<>();
// setters and getters
}

@Repository
@Transactional(readOnly = true)
public class DeckRepositoryImpl implements DeckRepositoryCustom {

    @PersistenceContext
    EntityManager entityManager;

    @Override
    public Deck getDeckContaining(List<String> cardIds) {
        String queryStr =
                "select deck_id\n" +
                "from deck_cards\n" +
                // Hard-coding card_ids of interest for now to 
                // see if the query itself works
                "where card_id in (1, 2, 3, 4, 5, 6, 7, 8)\n" +
                "group by deck_id\n" +
                "having count(*) = 8";
        Query query = entityManager.createNativeQuery(queryStr, 
Deck.class);
    return (Deck) query.getSingleResult();
}

我感到困惑，因为我认为我使用了实体中定义的字段名。是否有我可能遗漏的内容？

java.sql.SQLException:找不到列“id”。问题在于列的名称。

referencedColumnName=“id”

是此处（以下）可能的嫌疑人

可能的解决办法：

• 删除

  referencedColumnName=“id”

• 由于您没有按照DB方案发布名称（并且没有

  @列

  ），请确保DB中存在id字段

---

那么您的数据库中有“甲板”表？您没有在“Deck”类之前指定任何“@Table”注释，因此JPA将通过defaultOops查找“Deck”表我忘记添加在复制粘贴代码时指定表名的部分。它的存在是@Data@Entity@表（name=“decks”）但仍然无法使其工作为两个实体使用相同的id列名有什么问题？Hello@mangusta，在我们的上一个项目中，有人使用相同的名称创建了列，为了进行关系映射，我们必须精确地指出我们引用的实体。在我看来，有一个与deckId这样的关联实体的名称是好的，不是吗？这没有任何区别，joinColumns和inverseJoinColumns引用不同的表，所以jpa知道哪个表“referencedColumnName”属于哪个表。我在这里看到的唯一可能原因是“cards”或“decks”都没有id列（可能两者都有）可能是这种情况，或者db中的名称可能不同

    List<String> teamCardIdsInString = new ArrayList<>();
    //....
    Deck deckOfInterest = 
    deckRepository.getDeckContaining(teamCardIdsInString);

2019-07-29 19:00:06.663  WARN 3409 --- [nio-8080-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Error: 0, SQLState: S0022
2019-07-29 19:00:06.664 ERROR 3409 --- [nio-8080-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper   : Column 'id' not found.
2019-07-29 19:00:06.690 ERROR 3409 --- [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.InvalidDataAccessResourceUsageException: could not execute query; SQL [select deck_id
from deck_cards
where card_id in (26000060, 28000017, 26000044, 26000039, 26000027, 28000015, 26000033, 28000000)
group by deck_id
having count(*) = 8]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute query] with root cause

java.sql.SQLException: Column 'id' not found.
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129) ~[mysql-connector-java-8.0.16.jar:8.0.16]
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) ~[mysql-connector-java-8.0.16.jar:8.0.16]
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) ~[mysql-connector-java-8.0.16.jar:8.0.16]
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) ~[mysql-connector-java-8.0.16.jar:8.0.16]
        at com.mysql.cj.jdbc.result.ResultSetImpl.findColumn(ResultSetImpl.java:561) ~[mysql-connector-java-8.0.16.jar:8.0.16]
        at com.mysql.cj.jdbc.result.ResultSetImpl.getInt(ResultSetImpl.java:825) ~[mysql-connector-java-8.0.16.jar:8.0.16]
        at com.zaxxer.hikari.pool.HikariProxyResultSet.getInt(HikariProxyResultSet.java) ~[HikariCP-3.2.0.jar:na]
        at org.hibernate.type.descriptor.sql.IntegerTypeDescriptor$2.doExtract(IntegerTypeDescriptor.java:62) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
        at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:47) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
        at