Reputation: 23
I am developing a web application using JPA/Hibernate with a legacy database. I have the following table with underlying_id and value_date as composite keys where underlying_id is also a foreign key
CREATE TABLE `underlying_settle_value_table` (
`underlying_id` varchar(250) NOT NULL,
`value_date` date NOT NULL,
`settle_value` double NOT NULL,
`risk_free_rate` double NOT NULL,
`div_yield` double NOT NULL,
PRIMARY KEY (`underlying_id`,`value_date`),
KEY `fk_underlying_settle_value_table_underlying_list_table1_idx` (`underlying_id`),
CONSTRAINT `fk_underlying_settle_value_table_underlying_list_table1` FOREIGN KEY (`underlying_id`) REFERENCES `underlying_list_table` (`underlying_id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8$$
I have created the following entity to represent that table:
@Entity
@Table(name="underlying_settle_value_table")
@IdClass(UnderlyingSettleValueTablePK.class)
public class UnderlyingSettleValueTableEntity implements Serializable {
@Id
@ManyToOne(targetEntity=UnderlyingListTableEntity.class)
@JoinColumn(name="underlying_id",referencedColumnName="underlying_id")
private UnderlyingListTableEntity underlyingId;
@Id
@Temporal(TemporalType.DATE)
private Date valueDate;
private Double settleValue;
private Double riskFreeRate;
@Column(name="div_yield")
private Double divYield;
.. setters and getters
}
and the idclass as:
public class UnderlyingSettleValueTablePK implements Serializable {
private UnderlyingListTableEntity underlyingId;
@Temporal(TemporalType.DATE)
private Date valueDate;
..setters and getters
}
When I use findAll method provided by JPA or JQL to search the results, it throws me an error even though I have mapped underlyingid as many to one:
INFO: HHH000327: Error performing load command : org.hibernate.HibernateException: More than one row with the given identifier was found: OR N3, for class com.invenio.dao.entity.admin.UnderlyingListTableEntity
Any help will be appreciated... Thanks in advance
The sql query got from show_sql is as follows:
Hibernate:
select
underlying0_.underlying_id as underlyi5_36_,
underlying0_.value_date as value1_36_,
underlying0_.div_yield as div2_36_,
underlying0_.risk_free_rate as risk3_36_,
underlying0_.settle_value as settle4_36_
from
underlying_settle_value_table underlying0_
where
underlying0_.underlying_id in (
'OR N3'
)
Hibernate:
select
underlying0_.underlying_id as underlyi1_35_0_,
underlying0_.bbg_underlying_id as bbg2_35_0_,
underlying0_.currency as currency3_35_0_,
underlying0_.invenio_product_code as invenio4_35_0_
from
underlying_list_table underlying0_
where
underlying0_.underlying_id=?
Upvotes: 1
Views: 19061
Reputation: 19533
Try this one.
@Entity
@Table(name="underlying_settle_value_table")
public class UnderlyingSettleValueTableEntity implements Serializable {
@EmbeededId
private UnderLiyingKey underKey;
@MapsId("underID")
@ManyToOne(targetEntity=UnderlyingListTableEntity.class)
@JoinColumn(name="underlying_id",referencedColumnName="underlying_id")
private UnderlyingListTableEntity underlyingId;
And the embeddedKey
@Embeddable
public class UnderLying implements Serializable
private int underId;
private Date value_date;
But the big concern here is :
the PK of the table is composited by two elements and Id and a Date, but your foreign Key to the same table just only use the ID, the question is how you can refer to an entity that use a composite key just with one value, not sure but it sound a bad design.
Upvotes: 1
Reputation: 327
Seems like you are getting more than one value from the search. If you can clean the database n try your search again. i'm sure it will work..
Can you provide the table structure for underlying_settle_value_table more clearly .. you can use @Embeddable and @EmbeddedId to map composite key .Don't use @Id twice in the same class
Upvotes: 2