我想在Scala + Hibernate中實現一對多關係(一家銀行有很多分支機構)。我收到以下錯誤:在Scala +休眠中實現一對多關係
Initial SessionFactory creation failed.org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: admin.bank.manage.BankHib.branches
這些都是表:
CREATE TABLE banks (
sk int NOT NULL,
code varchar(10) DEFAULT NULL,
name varchar(100) DEFAULT NULL,
version smallint DEFAULT NULL,
PRIMARY KEY (sk)
)
CREATE TABLE branches (
sk smallint NOT NULL,
code varchar(10) DEFAULT NULL,
name varchar(100) NOT NULL,
descrip varchar(200) DEFAULT NULL,
bank_sk tinyint NOT NULL, // <== this is the bank sk column
notes text,
version smallint DEFAULT NULL,
state char(2) NOT NULL,
city varchar(45) DEFAULT NULL,
county varchar(45) DEFAULT NULL,
county_id int DEFAULT NULL,
zipcode varchar(20) DEFAULT NULL,
PRIMARY KEY (sk)
)
而這些都是Hibernate類:
@Entity
@Table(name = "banks")
class BankHib {
@Id
var sk: Int = _
var code: String = _
var name: String = _
var version: Int = _
@OneToMany(orphanRemoval=false)
@JoinColumn(name="bank_sk")
var branches: Seq[BranchHib] = _
}
@Entity
@Table(name = "branches")
class BranchHib {
@Id
var sk: Int = _
var code: String = _
var name: String = _
var descrip: String = _
var city: String = _
var county: String = _
@Column(name = "county_id")
var countyId: Int = _
var state: String = _
var zipCode: String = _
var notes: String = _
@ManyToOne
@JoinColumn(name="bank_sk", nullable=false)
var bank: BankHib = _
var version: Int = _
}
當我運行一個選擇分支的錯誤恰巧還應該檢索相關銀行:
val list = session.createQuery("from BranchHib order by name").list.
asScala.toList.map(_.asInstanceOf[BranchHib])
如何使這項工作?