I have two java entity classes :
#Table(name = "user")
public class UserEntity
{
#Id
#Column(name = "id", unique = true, nullable = false)
private Long id;
#OneToOne(cascade = CascadeType.PERSIST, fetch = FetchType.EAGER)
#JoinColumn(name = "opportunity_id")
private OpportunityEntity opportunity;
}
and
#Table(name = "opportunity")
public class OpportunityEntity
{
#Id
#Column(name = "id", unique = true, nullable = false)
private Long id;
#OneToMany
#JoinColumn(name = "opportunity_id")
private List<UserEntity> users;
#OneToOne
#JoinColumn(name = "mainuser_id")
private UserEntity mainUser;
}
When i search for a list of Users [find users], i've got a "stackoverflow" when mapping User.opportunity.
the bug was clear that the opportunity.mainUser refer to User which itself refer to the same opportunity.
Is there another way to design my models ?
For example create a boolean isMain in User Model ?
Try to specify relationship to UserEntity by adding mappedBy to annotatation
#Table(name = "opportunity")
public class OpportunityEntity
{
#Id
#Column(name = "id", unique = true, nullable = false)
private Long id;
#OneToMany
#JoinColumn(name = "opportunity_id")
private List<UserEntity> users;
#OneToOne(mappedBy="opportunity")
#JoinColumn(name = "mainuser_id")
private UserEntity mainUser;
}
Related
I have an issue with hibernate and postgres using spring boot.
When I run the application I see in postgres logs these errors(without any data bootstrap):
2021-06-25 13:55:31.057 UTC [81] ERROR: constraint "uk_j1xiaxeat9b5r1qs27ei0t2a6" of
relation "process_template_base_environmental_impact" does not exist
2021-06-25 13:55:31.057 UTC [81] STATEMENT: alter table
process_template_base_environmental_impact drop constraint
UK_j1xiaxeat9b5r1qs27ei0t2a6
2021-06-25 13:55:31.062 UTC [81] ERROR: constraint "uk_9568qjc94suvuskoi9o2li3er" of
relation "process_template_elementary_flow_template" does not exist
2021-06-25 13:55:31.062 UTC [81] STATEMENT: alter table
process_template_elementary_flow_template drop constraint
UK_9568qjc94suvuskoi9o2li3er
2021-06-25 13:55:31.064 UTC [81] ERROR: constraint "uk_dy1ej2j9qxeoq6ca641tpfxr5" of
relation "process_template_flow_template" does not exist
2021-06-25 13:55:31.064 UTC [81] STATEMENT: alter table
process_template_flow_template drop constraint UK_dy1ej2j9qxeoq6ca641tpfxr5
I have an entity called ProcessTemplate with ProcessTemplateId as compositeKey, and 3 cascades on ElementaryFlowTemplate, BaseEnvironmentalImpact, and FlowTemplate.
ProcessTemplate:
#Data
#Entity
#EqualsAndHashCode(onlyExplicitlyIncluded = true)
#Table(name = "process_template")
public class ProcessTemplate {
#EmbeddedId
#EqualsAndHashCode.Include
private ProcessTemplateId id;
#ManyToOne
#JoinColumn(name = "fk_process_base", referencedColumnName = "id")
private ProcessBase processBase;
#ManyToOne
#JoinColumn(name = "fk_reference_flow_base", referencedColumnName = "id")
private FlowBase referenceProduct;
#OneToMany(cascade = CascadeType.ALL)
private Set<BaseEnvironmentalImpact> baseEnvironmentalImpacts;
#OneToMany(cascade = CascadeType.ALL)
#OrderBy("impactsContribute DESC" )
private Set<FlowTemplate> flowsTemplate;
#OneToMany(cascade = CascadeType.ALL)
#OrderBy("impactsContribute DESC" )
private Set<ElementaryFlowTemplate> elementaryFlowsTemplate;
#ManyToOne
#JoinColumn(name = "fk_source_info", referencedColumnName = "id")
private SourceInfo sourceInfo;
#Column(name = "version")
#Version
private Long version;
}
ProcessTemplateId:
#Embeddable
public class ProcessTemplateId implements Serializable {
#Column(name = "process_base_id")
private UUID processBaseId;
#Column(name = "reference_product_id")
private UUID referenceProductId;
public ProcessTemplateId() {
}
public ProcessTemplateId(UUID processBaseId, UUID referenceProductId) {
this.processBaseId = processBaseId;
this.referenceProductId = referenceProductId;
}
public UUID getProcessBaseId() {
return processBaseId;
}
public UUID getReferenceProductId() {
return referenceProductId;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof ProcessTemplateId)) return false;
ProcessTemplateId that = (ProcessTemplateId) o;
return Objects.equals(getProcessBaseId(), that.getProcessBaseId()) &&
Objects.equals(getReferenceProductId(), that.getReferenceProductId());
}
#Override
public int hashCode() {
return Objects.hash(getProcessBaseId(), getReferenceProductId());
}
}
AbstractFlowTemplate:
#Data
#EqualsAndHashCode(onlyExplicitlyIncluded = true)
#Entity
#Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public abstract class AbstractFlowTemplate {
#Id
#EqualsAndHashCode.Include
private String id;
#Enumerated(EnumType.STRING)
private FlowType flowType;
#ManyToOne
#JoinColumn(name = "fk_source_info", referencedColumnName = "id")
private SourceInfo sourceInfo;
#Column(name = "version")
#Version
private Long version;
}
ElementaryFlowTemplate:
#Data
#Entity
#EqualsAndHashCode(callSuper = true, onlyExplicitlyIncluded = true)
#Table(name = "elementary_flow_template")
public class ElementaryFlowTemplate extends AbstractFlowTemplate {
#ManyToOne
#JoinColumn(name = "fk_elementary_flow_base", referencedColumnName = "id")
private ElementaryFlowBase elementaryFlowBase;
}
FlowTemplate (linkedProcessTemplate is not the bidirectional relation to ProcessTemplate but another unidirectional relation, because each flowTemplate had a link to another ProcessTemplate):
#Data
#Entity
#EqualsAndHashCode(callSuper = true, onlyExplicitlyIncluded = true)
#Table(name = "flow_template")
public class FlowTemplate extends AbstractFlowTemplate {
#ManyToOne
#JoinColumn(name = "fk_flow_base", referencedColumnName = "id")
private FlowBase flowBase;
#ManyToOne(cascade = CascadeType.MERGE)
#JoinColumns({#JoinColumn(name = "process_base_id", referencedColumnName =
"process_base_id"),
#JoinColumn(name = "reference_product_id", referencedColumnName =
"reference_product_id")})
private ProcessTemplate linkedProcessTemplate;
}
BaseEnvironmentalImpact:
#Data
#Entity
#EqualsAndHashCode(onlyExplicitlyIncluded = true)
#Table(name = "base_environmental_impact")
public class BaseEnvironmentalImpact {
#Id
#EqualsAndHashCode.Include
private String id;
private double value;
#ManyToOne
#JoinColumn(name = "fk_methodology", referencedColumnName = "id")
private Methodology methodology;
#ManyToOne
#JoinColumn(name = "fk_impact_category", referencedColumnName = "id")
private ImpactCategory impactCategory;
#ManyToOne
#JoinColumn(name = "fk_impact_indicator", referencedColumnName = "id")
private ImpactIndicator impactIndicator;
#ManyToOne
#JoinColumn(name = "fk_source_info", referencedColumnName = "id")
private SourceInfo sourceInfo;
#Column(name = "version")
#Version
private Long version;
//ref
#ManyToOne
#JoinColumn(name = "fk_elementary_flow_base")
private ElementaryFlowBase elementaryFlowBase;
#ManyToOne
#JoinColumns({
#JoinColumn(
name = "process_base_id",
referencedColumnName = "process_base_id"),
#JoinColumn(
name = "reference_product_id",
referencedColumnName = "reference_product_id")
})
private ProcessTemplate processTemplate;
}
As I wrote I cannot understand why I had an errors log, probably I make a mistake in the relation or cascade but I'm not able to figure out the issue. If I import data they seem correctly inserted so I cannot understand the problem.
Thanks in advance for the help.
SOLVED, EDIT:
I solve only the error on ProcessTemplate-BaseEnvironmentalImpact adding a mappedBy.
I don't include a schema because I think it's autogenerated, I include these parameters in application properties:
spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation = true
spring.jpa.hibernate.ddl-auto = create-drop
logging.level.org.hibernate = ERROR
spring.jpa.generate-ddl = true
I also solved other issues adding:
#JoinColumns({
#JoinColumn(name = "fk_pt_process_base_id", referencedColumnName = "process_base_id"),
#JoinColumn(name = "fk_pt_reference_product_id", referencedColumnName = "reference_product_id")
} )
I have a problem with DiscriminatorColumn and DiscriminatorValue.
My expectation is :
-TypeOne, TypeTwo, TypeThree are options related to the User.
-A user can have TypeOne only 1 row.
-A user can have TypeTwo or TypeThree multiple rows.
-I used Pageable for search criteria and sorting by typeOneEntity.optionCode
User table.
|id|user_id|
|-|-|
|1114|a#a.com|
UserOption table.
|id|user_id|option_code|option_type_name|
|-|-|-|-|
|1|1114|CODE_1|TYPE_1|
|2|1114|CODE_2|TYPE_2|
|3|1114|CODE_3|TYPE_2|
|4|1114|CODE_4|TYPE_3|
Ps. User.id = UserOption.user_id
I have to create three entities map to this data.
#Entity
#Table(name = "user")
public class User{
#Column()
private Long id;
#Column()
private String userId;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "id", referencedColumnName = "user_id", insertable = false, updatable = false)
private TypeOne typeOneEntity;
#OneToMany(cascade = CascadeType.ALL)
#JoinColumn(name = "id", referencedColumnName = "user_id", insertable = false, updatable = false)
private Set<TypeTwo> typeTwoEntities;
#OneToMany(cascade = CascadeType.ALL)
#JoinColumn(name = "id", referencedColumnName = "user_id", insertable = false, updatable = false)
private Set<TypeThree> typeThreeEntities;
}
#Table(name = "user_option")
#Inheritance(strategy = InheritanceType.SINGLE_TABLE)
#DiscriminatorColumn(name = "option_type_name")
public abstract class UserOption{
#Column
private Long id;
#Column(name = "user_id", nullable = false)
private Long userId;
#Column
private String optionCode;
}
#Entity
#DiscriminatorValue(value = "TYPE_1")
public class TypeOne extends UserOption {
}
#Entity
#DiscriminatorValue(value = "TYPE_2")
public class TypeTwo extends UserOption {
}
#Entity
#DiscriminatorValue(value = "TYPE_3")
public class TypeThree extends UserOption {
}
After I build and try to find data, I found two issues.
1.On typeOneEntity(#OneToOne) is null.
2.On #OneToMany : I got this error ORA-01722: invalid number (error message from Hibernate)
This Entity model that I create it correct or not?
Or it need to change entity model.
I have a User Class
#Entity(name = "users")
#Table(name = "users")
public class User implements UserDetails {
static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "user_id", nullable = false)
private Long id;
#Column(name = "username", nullable = false, unique = true)
private String username;
#Column(name = "password", nullable = false)
private String password;
}
Tied to a simple Repository
public interface UserRepository extends PagingAndSortingRepository<User, Long> {
}
And I have an Instructor Class that has a nested User object
#Entity
#Table(name = "instructors")
public class Instructor {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "instructor_id", nullable = false, updatable = false)
private Long id;
#OneToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "user_id")
private User user;
#OneToMany(fetch = FetchType.EAGER)
#JoinColumn(name = "course_id")
private List<Course> courses;
}
It is saved with the following repository
public interface InstructorRepository extends PagingAndSortingRepository<Instructor, Long> {
}
The JSON I am posting
{
"user": {
"id": 1
}
}
When I try to do a POST to /instructors . User is coming in null. Is there something I am missing to get JPA to tie the two together? I have tried adding CascadeType.ALL onto the field and that only throws a detached persist exception.
Leave the CascadeType.ALL to Instructor like you already tried:
#ManyToOne(fetch = FetchType.EAGER, cascade=CascadeType.ALL)
#JoinColumn(name = "user_id")
private User user;
In addition add the following to User. Seems to work with me. It provides the mapping information and makes JPA treat User managed
#OneToMany(mappedBy="user")//, cascade=CascadeType.ALL)
private List<Instructor> instructors = new ArrayList<>();
I have commented out the cascadeType in the above but it might be useful if you want to persist User wit all of its Instructors.
I have a database with several entities, in particular Book and User. Between them there exists a ManyToMany relationship like this:
Book:
#Entity
#Table(name = "Books")
public class Book implements Serializable
{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.TABLE)
#Column(name = "bookId", nullable = false, unique = true)
private Long id;
#Column(name = "title", nullable = false)
private String title;
#Column(name = "price", nullable = false)
private int price;
#ManyToMany(fetch = FetchType.EAGER)
#JoinTable(name = "User_Book",
joinColumns = #JoinColumn(name = "bookId"),
inverseJoinColumns = #JoinColumn(name = "userId"))
private Set<UserAccount> users;
User:
#Entity
#Table(name = "UserAccounts")
public class UserAccount implements Serializable
{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.TABLE)
#Column(name = "userId", nullable = false, unique = true)
private Long id;
#Column(name = "username", nullable = false, unique = true)
private String username;
#Column(name = "password", nullable = false)
private String password;
#ManyToMany(fetch = FetchType.EAGER)
#JoinTable(name = "User_Book",
joinColumns = #JoinColumn(name = "userId"),
inverseJoinColumns = #JoinColumn(name = "bookId"))
Set<Book> purchasedBooks;
Everything works fine, the table User_Book is indeed created in the database. The problem seems to be related to the access of this Table.
For example,
Query query = entityManager.createQuery("SELECT u FROM User_Book u");
keeps telling me the following:
The abstract schema type 'User_Book' is unknown
So, shall I create from scratch the User_Book entity? Will it get automtically populated like now, that is, whenever a user buys a book, will this purchase be recorded in the table?
User_Book is not an entity. Therefore you cannot use createQuery, BUT you can use createNativeQuery to execute a SQL query:
Query query = entityManager.createNativeQuery("SELECT * FROM User_Book");
The result will be List<Object[]>
I have tried to create some JPA Entities for a DB designed with the following tables: PRINCIPALS and CREDENTIALS which have the following relations with other tables:
#Entity
#Table(name = "CREDENTIALS")
public class Credentials {
#Id
#Column(name = "CREDENTIAL_ID")
private Integer credentialID;
#Id
#Column(name = "CREDENTIAL_TYPE_ID")
private String credentialTypeID;
#OneToOne
#JoinColumn(name = "CREDENTIAL_TYPE_ID", insertable = false, updatable = false)
private CredentialTypes credentialTypes;
}
CREDENTIALS has a oneToOne relation with CREDENTIAL_TYPES
#Entity
#Table(name = "CREDENTIAL_TYPES")
public class CredentialTypes {
#Id
#Column(name = "CREDENTIAL_TYPE_ID")
private String credentialTypeID;
#Column(name = "DESCRIPTION")
private String description;
}
#Entity
#Table(name = "PRINCIPALS")
public class Principals implements Serializable {
#Id
#Column(name = "PRINCIPAL_TYPE_ID", nullable = false)
private String principalTypeID;
#Column(name = "PRINCIPAL_ID", nullable = false)
private String principalID;
#OneToOne
#JoinColumn(name = "PRINCIPAL_TYPE_ID", insertable = false, updatable = false)
private PrincipalTypes principalTypes;
#OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
#JoinTable(name = "PRINCIPAL_CREDENTIAL",
joinColumns = #JoinColumn(name = "CREDENTIAL_ID"),
inverseJoinColumns = #JoinColumn(name = "PRINCIPAL_ID"))
private List<Credentials> credentials;
PRINCIPALS has a oneToOne relation with PRINCIPAL_TYPES
#Entity
#Table(name = "PRINCIPAL_TYPES")
public class PrincipalTypes implements Serializable {
#Id
#Column(name = "PRINCIPAL_TYPE_ID", nullable = false)
private String principalTypeID;
#Column(name = "DESCRIPTION")
private String description;
And finally PRINCIPALS has a oneToMany relation with CREDENTIALS and uses a join table PRINCIPLE_CREDENTIAL
#Entity
#Table(name = "PRINCIPAL_CREDENTIAL")
public class PrincipalCredential implements Serializable {
#Id
#Column(name = "PRINCIPAL_TYPE_ID", nullable = false)
private String principalTypeID;
#Id
#Column(name = "PRINCIPAL_ID", nullable = false)
private String principalID;
#Id
#Column(name = "CREDENTIAL_ID")
private Integer credentialID;
#Id
#Column(name = "CREDENTIAL_TYPE_ID")
private String credentialTypeID;
At startup (using SpringBoot) I receive an error for the oneToMany relation between Principals and Credentials and just don't have any idea how to fix it... Tried various other methods (The DB design cannot be changed).
Caused by: org.hibernate.AnnotationException: A Foreign key refering entities.Principals from entities.Credentials has the wrong number of column. should be 2
at org.hibernate.cfg.annotations.TableBinder.bindFk(TableBinder.java:502)
at org.hibernate.cfg.annotations.CollectionBinder.bindCollectionSecondPass(CollectionBinder.java:1467)
at org.hibernate.cfg.annotations.CollectionBinder.bindManyToManySecondPass(CollectionBinder.java:1233)
at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:794)
at org.hibernate.cfg.annotations.CollectionBinder$1.secondPass(CollectionBinder.java:729)
at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:70)
at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1697)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1426)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1846)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:85
I find the exception wierd because there is no refering of Principlas from Credentials....
PRINCIPLE_TYPE_ID and CREDENTIAL_TYPE_ID are missing in the joinColumns/inverseJoinColumns. I think you must use the #JoinColumns Annotation