У меня есть следующие объекты:
Предложение:
@Entity
public class Offer implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Embedded
@AssociationOverride(name = "fees",
joinTable = @JoinTable(
name = "offer_fees",
inverseJoinColumns = @JoinColumn(name = "fee_id", referencedColumnName = "id"),
joinColumns = @JoinColumn(name = "offer_id", referencedColumnName = "id")
)
)
private Quote quote;
Цитата:
@Embeddable
public class Quote implements Serializable {
@Column(precision = 13, scale = 3)
private BigDecimal price;
@OneToMany
private List<Fee> fees = new ArrayList<>();
Плата:
@Entity
public class Fee implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@NotNull
@Column(precision = 8, scale = 4)
private BigDecimal rate;
Каждый класс имеет геттеры и сеттеры по умолчанию. На данный момент все работает нормально. Но затем мне нужно добавить еще один объект:
@Entity
public class Purchase implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@ManyToOne
private Offer offer;
@Embedded
@AssociationOverride(name = "fees",
joinTable = @JoinTable(
name = "purchase_fees",
inverseJoinColumns = @JoinColumn(name = "fee_id", referencedColumnName = "id"),
joinColumns = @JoinColumn(name = "purchase_id", referencedColumnName = "id")
)
)
private Quote quote;
На этом этапе мои запросы перестают работать. Например, этот запрос:
public List<Purchase> getPurchases(BigDecimal price) {
TypedQuery<Purchase> q = em.createQuery(
"SELECT p FROM Purchase p"
+ " WHERE p.offer.quote.price = :price", Purchase.class);
q.setParameter("price", price);
return q.getResultList();
}
Возвращает эту ошибку:
org.eclipse.persistence.exceptions.DatabaseException Internal Exception: org.postgresql.util.PSQLException: ERROR: column "id" does not exist Posição: 8 Error Code: 0 Call: SELECT ID, PRICE FROM OFFER WHERE (ID = ?) bind => [1 parameter bound] Query: ReadObjectQuery(referenceClass=Offer sql="SELECT ID, PRICE FROM OFFER WHERE (ID = ?)")
Я установил drop-and-create в persistence.xml, чтобы узнать, смогу ли я найти, что не так:
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
И он генерирует таблицу Offer без идентификатора, и offer_fees тоже не ссылается на Offer, а на Purchase:
ALTER TABLE PURCHASE DROP CONSTRAINT FK_PURCHASE_OFFER_ID
ALTER TABLE offer_fees DROP CONSTRAINT FK_offer_fees_offer_id
ALTER TABLE offer_fees DROP CONSTRAINT FK_offer_fees_fee_id
ALTER TABLE purchase_fees DROP CONSTRAINT FK_purchase_fees_fee_id
SELECT 1
ALTER TABLE purchase_fees DROP CONSTRAINT FK_purchase_fees_purchase_id
SELECT 1
DROP TABLE OFFER CASCADE
DROP TABLE FEE CASCADE
DROP TABLE PURCHASE CASCADE
DROP TABLE offer_fees CASCADE
DROP TABLE purchase_fees CASCADE
CREATE TABLE OFFER (PRICE DECIMAL(13,3))
CREATE TABLE FEE (ID SERIAL NOT NULL, RATE DECIMAL(8,4), PRIMARY KEY (ID))
CREATE TABLE PURCHASE (ID SERIAL NOT NULL, PRICE DECIMAL(13,3), OFFER_ID BIGINT, PRIMARY KEY (ID))
CREATE TABLE offer_fees (offer_id BIGINT NOT NULL, fee_id BIGINT NOT NULL, PRIMARY KEY (offer_id, fee_id))
CREATE TABLE purchase_fees (purchase_id BIGINT NOT NULL, fee_id BIGINT NOT NULL, PRIMARY KEY (purchase_id, fee_id))
ALTER TABLE PURCHASE ADD CONSTRAINT FK_PURCHASE_OFFER_ID FOREIGN KEY (OFFER_ID) REFERENCES PURCHASE (ID)
ALTER TABLE offer_fees ADD CONSTRAINT FK_offer_fees_offer_id FOREIGN KEY (offer_id) REFERENCES PURCHASE (ID)
ALTER TABLE offer_fees ADD CONSTRAINT FK_offer_fees_fee_id FOREIGN KEY (fee_id) REFERENCES FEE (ID)
ALTER TABLE purchase_fees ADD CONSTRAINT FK_purchase_fees_fee_id FOREIGN KEY (fee_id) REFERENCES FEE (ID)
ALTER TABLE purchase_fees ADD CONSTRAINT FK_purchase_fees_purchase_id FOREIGN KEY (purchase_id) REFERENCES PURCHASE (ID)