Java Hibernate继承有问题:@SecondaryTable注释
我有以下课程: //演员类Java Hibernate继承有问题:@SecondaryTable注释,java,spring,hibernate,Java,Spring,Hibernate,我有以下课程: //演员类 @Entity @Table(name=Actor.TABLE_NAME) @Inheritance(strategy=InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name="type") @JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id") public abstract class A
@Entity
@Table(name=Actor.TABLE_NAME)
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="type")
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")
public abstract class Actor{
public static final String TABLE_NAME = "actor";
@Id
@Column(name="id")
private String id = IdGenerator.createId();
public Actor() { }
public String getId() { return id; }
}
@Entity
@SecondaryTable(name = Company.TABLE_NAME, pkJoinColumns= {@PrimaryKeyJoinColumn(name=Company.PK_NAME)})
@DiscriminatorValue("company")
public class Company extends Actor {
public static final String TABLE_NAME = "company";
public static final String PK_NAME = "id";
// Inherits Id from superclass Actor
@ManyToOne(cascade={CascadeType.PERSIST, CascadeType.MERGE}, fetch=FetchType.EAGER)
@JoinColumn(name="categoryid")
private Category category;
@Column(name = "name", nullable=false)
@Size(min=2, max=60, message="LATER")
private String name;
@Column(name="domainName", nullable=true)
private String domainName;
@Column(name="registrationNumber", nullable=true)
private String registrationNumber;
@Column(name="description")
private String description;
@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
@JoinColumn(name="itemId")
private Set<Image> logos = new HashSet<>();
@OneToMany(mappedBy="company", cascade=CascadeType.ALL, fetch=FetchType.LAZY)
private Set<Branch> branches = new HashSet<>();
public Company() {}
public void addBranch(Branch branch) {
branch.setCompany(this);
branches.add(branch);
}
public void addLogo(Image logo) {
}
// GETTERS AND SETTERS .......
}
@Entity
@Table(name=Branch.TABLE_NAME)
public class Branch {
public static final String TABLE_NAME = "branch";
@Id
@Column(name = "id")
private String id = IdGenerator.createId();
@OneToOne(cascade=CascadeType.ALL)
@JoinColumn(name="address")
private Address address;
@Column(name = "telephone")
private String telephone;
@ManyToOne
@JoinColumn(name="company")
private Company company;
public Branch() {
this.address.setAddressCategory(AddressCategory.BRANCH);
}
// GETTERS AND SETTERS
}
@Entity
@Table(name=Address.TABLE_ADDRESS)
public class Address {
public static final String TABLE_ADDRESS = "address";
@Id
@Column(name="id")
private String id = IdGenerator.createId();
@Column(name="category", nullable=false)
private AddressCategory addressCategory;;
@Column(name="streetname", nullable=true)
private String streetName;
@Column(name="number", nullable=true)
private String number;
@Column(name="postcode", nullable=true)
private String postcode;
@Column(name="city", nullable=true)
private String city;
@Column(name="country", nullable=true)
private String country;
@Column(name = "telephone")
private String telephone;
@Embedded
private EmailAddress email;
@Column(name="description", nullable=true)
private String description;
@ManyToOne
@JoinColumn(name="actor")
@NotNull(groups = {Update.class})
@JsonIgnore
private Actor actor;
public Address() { }
public Address(Actor actor) {
this.actor = actor;
}
// GETTERS AND SETTERS
}
//公司级
@Entity
@Table(name=Actor.TABLE_NAME)
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="type")
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")
public abstract class Actor{
public static final String TABLE_NAME = "actor";
@Id
@Column(name="id")
private String id = IdGenerator.createId();
public Actor() { }
public String getId() { return id; }
}
@Entity
@SecondaryTable(name = Company.TABLE_NAME, pkJoinColumns= {@PrimaryKeyJoinColumn(name=Company.PK_NAME)})
@DiscriminatorValue("company")
public class Company extends Actor {
public static final String TABLE_NAME = "company";
public static final String PK_NAME = "id";
// Inherits Id from superclass Actor
@ManyToOne(cascade={CascadeType.PERSIST, CascadeType.MERGE}, fetch=FetchType.EAGER)
@JoinColumn(name="categoryid")
private Category category;
@Column(name = "name", nullable=false)
@Size(min=2, max=60, message="LATER")
private String name;
@Column(name="domainName", nullable=true)
private String domainName;
@Column(name="registrationNumber", nullable=true)
private String registrationNumber;
@Column(name="description")
private String description;
@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
@JoinColumn(name="itemId")
private Set<Image> logos = new HashSet<>();
@OneToMany(mappedBy="company", cascade=CascadeType.ALL, fetch=FetchType.LAZY)
private Set<Branch> branches = new HashSet<>();
public Company() {}
public void addBranch(Branch branch) {
branch.setCompany(this);
branches.add(branch);
}
public void addLogo(Image logo) {
}
// GETTERS AND SETTERS .......
}
@Entity
@Table(name=Branch.TABLE_NAME)
public class Branch {
public static final String TABLE_NAME = "branch";
@Id
@Column(name = "id")
private String id = IdGenerator.createId();
@OneToOne(cascade=CascadeType.ALL)
@JoinColumn(name="address")
private Address address;
@Column(name = "telephone")
private String telephone;
@ManyToOne
@JoinColumn(name="company")
private Company company;
public Branch() {
this.address.setAddressCategory(AddressCategory.BRANCH);
}
// GETTERS AND SETTERS
}
@Entity
@Table(name=Address.TABLE_ADDRESS)
public class Address {
public static final String TABLE_ADDRESS = "address";
@Id
@Column(name="id")
private String id = IdGenerator.createId();
@Column(name="category", nullable=false)
private AddressCategory addressCategory;;
@Column(name="streetname", nullable=true)
private String streetName;
@Column(name="number", nullable=true)
private String number;
@Column(name="postcode", nullable=true)
private String postcode;
@Column(name="city", nullable=true)
private String city;
@Column(name="country", nullable=true)
private String country;
@Column(name = "telephone")
private String telephone;
@Embedded
private EmailAddress email;
@Column(name="description", nullable=true)
private String description;
@ManyToOne
@JoinColumn(name="actor")
@NotNull(groups = {Update.class})
@JsonIgnore
private Actor actor;
public Address() { }
public Address(Actor actor) {
this.actor = actor;
}
// GETTERS AND SETTERS
}
//地址类
@Entity
@Table(name=Actor.TABLE_NAME)
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="type")
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")
public abstract class Actor{
public static final String TABLE_NAME = "actor";
@Id
@Column(name="id")
private String id = IdGenerator.createId();
public Actor() { }
public String getId() { return id; }
}
@Entity
@SecondaryTable(name = Company.TABLE_NAME, pkJoinColumns= {@PrimaryKeyJoinColumn(name=Company.PK_NAME)})
@DiscriminatorValue("company")
public class Company extends Actor {
public static final String TABLE_NAME = "company";
public static final String PK_NAME = "id";
// Inherits Id from superclass Actor
@ManyToOne(cascade={CascadeType.PERSIST, CascadeType.MERGE}, fetch=FetchType.EAGER)
@JoinColumn(name="categoryid")
private Category category;
@Column(name = "name", nullable=false)
@Size(min=2, max=60, message="LATER")
private String name;
@Column(name="domainName", nullable=true)
private String domainName;
@Column(name="registrationNumber", nullable=true)
private String registrationNumber;
@Column(name="description")
private String description;
@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
@JoinColumn(name="itemId")
private Set<Image> logos = new HashSet<>();
@OneToMany(mappedBy="company", cascade=CascadeType.ALL, fetch=FetchType.LAZY)
private Set<Branch> branches = new HashSet<>();
public Company() {}
public void addBranch(Branch branch) {
branch.setCompany(this);
branches.add(branch);
}
public void addLogo(Image logo) {
}
// GETTERS AND SETTERS .......
}
@Entity
@Table(name=Branch.TABLE_NAME)
public class Branch {
public static final String TABLE_NAME = "branch";
@Id
@Column(name = "id")
private String id = IdGenerator.createId();
@OneToOne(cascade=CascadeType.ALL)
@JoinColumn(name="address")
private Address address;
@Column(name = "telephone")
private String telephone;
@ManyToOne
@JoinColumn(name="company")
private Company company;
public Branch() {
this.address.setAddressCategory(AddressCategory.BRANCH);
}
// GETTERS AND SETTERS
}
@Entity
@Table(name=Address.TABLE_ADDRESS)
public class Address {
public static final String TABLE_ADDRESS = "address";
@Id
@Column(name="id")
private String id = IdGenerator.createId();
@Column(name="category", nullable=false)
private AddressCategory addressCategory;;
@Column(name="streetname", nullable=true)
private String streetName;
@Column(name="number", nullable=true)
private String number;
@Column(name="postcode", nullable=true)
private String postcode;
@Column(name="city", nullable=true)
private String city;
@Column(name="country", nullable=true)
private String country;
@Column(name = "telephone")
private String telephone;
@Embedded
private EmailAddress email;
@Column(name="description", nullable=true)
private String description;
@ManyToOne
@JoinColumn(name="actor")
@NotNull(groups = {Update.class})
@JsonIgnore
private Actor actor;
public Address() { }
public Address(Actor actor) {
this.actor = actor;
}
// GETTERS AND SETTERS
}
当我使用Postman提供的以下json运行上述代码时:
{
"categoryId": "ee6e75c9-2d1b-41c1-8f12-236fbf907683",
"name": "McDonalds",
"domainName": "www.McDonalds.be",
"registrationNumber": "5555555",
"description": "Food and Drink"
}
我得到以下例外情况:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Field 'company0_.categoryid' not found in field list
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[na:1.8.0_151]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[na:1.8.0_151]
at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[na:1.8.0_151]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.44.jar:5.1.44]
at com.mysql.jdbc.Util.getInstance(Util.java:408) ~[mysql-connector-java-5.1.44.jar:5.1.44]
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:943) ~[mysql-connector-java-5.1.44.jar:5.1.44
...
...
请注意,为了使文章简洁,我省略了控制器代码。上面的异常涉及company类中的categoryid属性。我删除了categorid,异常将categoryid替换为description属性
我认为这个问题与使用辅助表的注释有关
各表如下:
CREATE TABLE actor
(
id VARCHAR(255) DEFAULT '' NOT NULL,
type VARCHAR(255),
PRIMARY KEY (id)
)
CREATE TABLE company
(
id VARCHAR(255) NOT NULL,
categoryid VARCHAR(255),
name VARCHAR(255) NOT NULL,
`domainName` VARCHAR(255) NOT NULL,
`registrationNumber` VARCHAR(255),
description VARCHAR(255) NOT NULL,
PRIMARY KEY (id)
)
CREATE TABLE branch
(
id VARCHAR(255) NOT NULL,
company VARCHAR(255),
address VARCHAR(255),
telephone VARCHAR(255),
PRIMARY KEY (id)
)
CREATE TABLE address
(
id VARCHAR(255) NOT NULL,
category VARCHAR(255),
actor VARCHAR(255),
streetname VARCHAR(255),
number VARCHAR(255),
postcode VARCHAR(255),
city VARCHAR(255),
country VARCHAR(255),
telephone VARCHAR(255),
email VARCHAR(255),
description VARCHAR(255),
PRIMARY KEY (id)
)
经过一些研究,我自己找到了答案。由于我在
Company
类上使用@Secondarytable
注释,并且它也是从Actor
继承的,因此我必须指定Company
的属性应该保留在哪个表中。通过在公司
属性的每个@列
注释中添加“table=table_NAME”,问题得以解决。如果在@列
中没有“table=table\u NAME”,Hibernate将不知道是将公司
属性保存在参与者表还是公司表中。您可能还需要在公司实体中添加@table(NAME=actor.table\u NAME)。