I am inserting into HSQL following data:
INSERT INTO Consumer(id,ConsumerId,CREATEDBY,CREATEDAT,FK_Service,ConsumerType) VALUES(300,'adsgvcg-cvvce-hvchwec','sm',CURRENT_TIMESTAMP,1,'INTERNAL');
I have the following Classes which read from the table:
Entity(name = "Consumer")
#Table(name = "Consumer")
public class Consumer extends Base {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE)
#Column(name = "ID")
private long id;
#Basic(optional = false)
#Column(name = "ConsumerId", nullable = false)
private String ConsumerId;
#Basic(optional = false)
#Column(name = "ConsumerType", nullable = false)
private String ConsumerType;
#Basic//(optional = false)
#Column(name = "FK_Service", nullable = true)
private String service;
//Getter Setters etc
and the base class looks like:
public class Base implements Serializable{
#Basic
#Column(name = "MODIFIEDBY", nullable = true)
private String ModifiedBy;
#Basic
#Column(name = "MODIFIEDAT", nullable = true)
private Timestamp ModifiedAt;
#Basic
#Column(name = "CREATEDBY", nullable = true)
private String CreatedBy;
#Basic
#Column(name = "CREATEDAT", nullable = true)
private Timestamp CreatedAt;
//Getter Setters etc
When I am running the code, I am getting the following exception:
2015-07-25 22:21:12,875 ERROR [main] hbm2ddl.SchemaExport.? (?:?) - HHH000388: Unsuccessful: INSERT INTO Consumer(id,ConsumerId,CREATEDBY,CREATEDAT,FK_Service,ConsumerType) VALUES(300,'adsgvcg-cvvce-hvchwec','smenon2',CURRENT_TIMESTAMP,1,'INTERNAL')
2015-07-25 22:21:12,875 ERROR [main] hbm2ddl.SchemaExport.? (?:?) - user lacks privilege or object not found: CREATEDBY
However when I move the fields from the base class to the parent (Consumer) class, this exception no longer occurs and the fields are getting populated as well.
You need to use an inheritance strategy in hibernate
In your base entity, you need to add an annotation so that hibernate knows which strategy to use.
#MappedSuperclass
or
#Inhertitance(strategy=InheritanceType.SINGLE_TABLE) you can use one of these strategies :
InheritanceType.SINGLE_TABLE
InheritanceType.TABLE_PER_CLASS
InheritanceType.JOINED
This wikibook page can be helpful.
Related
I have an entity like Process, which will be created by , updated by one user. When I try to apply the filter. I have created the foreign key relationship in the database. Now, when I use the JPA Specification to apply dynamic filter, I am getting exception as
No property CREATED found for type Process!
#Table(name = "process")
#Entity
public class Process {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "PROCESS_ID")
#JsonProperty("id")
private Long id = null;
#NotNull
#Column(name = "NAME")
#JsonProperty("name")
private String name = null;
#Column(name = "CREATED_BY", updatable = false)
#JsonProperty("createdBy")
private Long createdBy = null;
#Column(name = "updatedBy", nullable = true)
#JsonProperty("updatedBy")
private Long updatedBy = null;
}
Hence, I Added the entity relationship mapping in the process entity as given below,
Now, I am getting below error. I am new to JPA and hibernate, the relation mapping is very confusing, kindly help.
#Table(name = "process")
#Entity
public class Process {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "PROCESS_ID")
#JsonProperty("id")
private Long id = null;
#NotNull
#Column(name = "NAME")
#JsonProperty("name")
private String name = null;
#Column(name = "CREATED_BY", updatable = false)
#JsonProperty("createdBy")
private Long createdBy = null;
#Column(name = "updatedBy", nullable = true)
#JsonProperty("updatedBy")
private Long updatedBy = null;
//newly added below properties so that there will be no error when fetching data
#OneToOne(targetEntity = UserDetails.class, fetch = FetchType.LAZY, mappedBy = "id")
private UserDetails CREATED;
#OneToOne(targetEntity = UserDetails.class, fetch = FetchType.LAZY, mappedBy = "id")
private UserDetails UPDATED;
}
Now, I am getting the below error
Referenced property not a (One|Many)ToOne: com.app.users.details.domain.UserDetails.id in mappedBy of com.app.scenarios.domain.Process.CREATED
Kindly let me know what i am doing wrong. I have a process which can be created by a user and can be updated by a user. In DB, I am having a foreign key relationship for process and userdetails entity.
EDIT
Code to get the filtered data from DB using JPA Specification
Page<process> result = this.processDao.findAll(getprocessGridData(processSearchCondition.getprocessName()), pageRequest);
private static Specification<process> getprocessGridData(String processName) {
return (Specification<process>) (root, query, criteriaBuilder) -> (
criteriaBuilder.like(root.get("name"), processName)
);
}
I guess what you actually want is this:
#Table(name = "process")
#Entity
public class Process {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "PROCESS_ID")
#JsonProperty("id")
private Long id;
#NotNull
#Column(name = "NAME")
#JsonProperty("name")
private String name;
#OneToOne(fetch = FetchType.LAZY)
#jOINColumn(name = "CREATED_BY", updatable = false)
private UserDetails createdBy;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "UPDATED_BY", nullable = true)
private UserDetails updatedBy;
}
We have a Java ee application running on JBoss 6.4 GA using JPA and Hibernate with the following entities:
#Entity
#SequenceGenerator(name = "sequence", sequenceName="SEQ_CAMPAIGNS_ID",allocationSize = 1)
#Table(name = "CAMPAIGN")
public class CampaignEntity implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequence")
#Column(name = "ID")
private Long id;
#Column(name = "NAME")
private String name;
#Column(name = "IS_ACTIVE", nullable = false)
private boolean active;
#Column(name = "START_DATE", nullable = false)
private Date startDate;
#Column(name = "END_DATE", nullable = false)
private Date endDate;
#Column(name = "LEGAL_ENTITY_ID", nullable = false)
private Integer legalEntityId;
#Column(name = "DEPARTMENT", nullable = false)
#Enumerated(value = EnumType.STRING)
private Department department;
#Column(name = "CATEGORY", nullable = false)
#Enumerated(value = EnumType.STRING)
private Category category;
#Embedded
CampaignConditionsEntity campaignConditions;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "campaign", orphanRemoval = true)
#OrderBy
private List<CodeEntity> campaignCodes;
public CampaignEntity() {
}
And the following CampaignConditionsEntity:
#Embeddable
public class CampaignConditionsEntity implements Serializable {
private static final String CAMPAIGN_ID = "CAMPAIGN_ID";
#ElementCollection(fetch = FetchType.EAGER)
#CollectionTable(name = "CAMPAIGN_COND_TRIP_TYPE", joinColumns = #JoinColumn(name = CAMPAIGN_ID))
private Set<TripTypeConditionEntity> tripTypeConditions;
And the following CodeEntity:
#Entity
#Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
#SequenceGenerator(name = "sequence", sequenceName = "SEQ_CODES_ID", allocationSize = 1)
public abstract class CodeEntity implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequence")
#Column(name = "ID", nullable = false)
private Long id;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "CAMPAIGN_ID")
private CampaignEntity campaign;
#OneToOne(mappedBy = "code", cascade = CascadeType.ALL, fetch = FetchType.LAZY, optional = false, orphanRemoval = true)
private DiscountEntity discount;
#Column(name = "MAX_USAGES", nullable = false)
private Integer maxUsages;
#Column(name = "UNLIMITED_USAGES", nullable = false)
private boolean unlimitedUsages;
#Column(name = "NEGATIVE_SH", nullable = false)
private boolean negativeSH;
#Column(name = "UNIQUE_BUYER", nullable = false)
private boolean uniqueBuyer;
#Column(name = "START_DATE")
private Date startDate;
#Column(name = "END_DATE")
private Date endDate;
#Embedded
private CodeConditionsEntity codeConditions;
public CodeEntity() {
}
This is the CodeConditionsEntity:
#Embeddable
public class CodeConditionsEntity implements Serializable {
private static final String CODE_ID = "CODE_ID";
#ElementCollection(fetch = FetchType.EAGER)
#CollectionTable(name = "CODE_COND_TRIP_TYPE", joinColumns = #JoinColumn(name = CODE_ID))
private Set<TripTypeConditionEntity> tripTypeConditions;
#ElementCollection(fetch = FetchType.EAGER)
#CollectionTable(name = "CODE_COND_CARRIERS", joinColumns = #JoinColumn(name = CODE_ID))
private Set<CarrierConditionEntity> carrierConditions;
This is the CarrierConditionEntity:
#Embeddable
public class CarrierConditionEntity implements Serializable {
#Column(name = "CARRIER", nullable = false, length = 3)
private String carrierCode;
#Column(name = "IS_INCLUDED", nullable = false)
private boolean included;
The problem is that in the logs we are finding unexpected deletes when the only operation that we are doing are finds of particular campaign entities.
In the production logs we find the following deletes
Hibernate: delete from CODE_COND_CARRIERS where CODE_ID=? and CARRIER=? and IS_INCLUDED=?
do you have any suggestion?
thanks
I have some suggestions :)
Be aware of what is a Persistence Context (EntityManager instance in JPA terminology / Session in Hibernate one), the entity lifecycle and transaction scope (unit of work)
Do not mutate entity state if you don't expect the changes to be reflected in database, or at least detach the entity before mutating it.
Mark your transaction as "readOnly" if you only fetch data in the related unit of work. (beware that if you have many "Transactional" methods joining the same physical transaction, the flag is set by the surrounding one and cannot be overridden by inner logical transactions). That way the EntityManager won't be flushed at the end of the transaction and pending changes won't be persisted to the database.
You can track the method triggering the unexpected deletion using an EntityListener on the related entity and printing the current strackTrace (new Throwable().printStackTrace()/ log(new Throwable()) in the PreRemove method
I found where was the problem:
The problem was that the Entities didn't have the equals() and the hashcode() implemented. Also there were entities that have a #PostLoad that modified the entity after loading it from database. Then in this situation Hibernate though that there was a change in those entities that didn't have the equals and the hashcode, and then it delete all of them and inserted again in the database (to have the same entities before the query)
Adding the equals and hashcode methods and deleting postload removed the unexpected deletes and inserts from the logs.
regards
I just cannot get the relationship working between my two classes mapped to SQL tables with Hibernate.
The Role class:
#Entity
#Table(name = "role")
public class Role {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="id")
private int id;
#Column(name="name")
private String name;
#OneToMany(mappedBy="memberinfo")
private Set<Memberinfo> members;
...
}
And the Memberinfo class:
#Entity
#Table(name = "memberinfo")
public class Memberinfo {
#Id #GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="id", nullable = false)
private int id;
#Column(name = "userid", nullable = false)
private String userid;
#Column(name = "email", nullable = false)
private String email;
#Column(name = "password", nullable = false)
private String password;
#Column(name = "salt", nullable = false)
private String salt;
#Column(name = "name", nullable = false)
private String name;
#Column(name = "address")
private String address;
#Column(name = "phonenum")
private String phonenum;
#ManyToOne(targetEntity=Role.class)
#JoinColumn(name="role_id")
private Role role;
...
}
When i try to fetch data from the DB, it connects, but throws an exception:
"HTTP Status 500 - #OneToOne or #ManyToOne on model.Memberinfo.role references an unknown entity: model.Role".
If i delete the variable "Role", then it works, and i can fetch the membership data, but i need the connection between the two tables, but in this case, the previously mentioned exception appears every time.
No other solutions on stackoverflow worked for me so far.
Any idea what am i doing wrong?
The "unknown entity error" can be thrown if the class is not actually an Entity (not annotated whith javax.persistence #Entity) or if the persitence provider doesn't "know" the class (package not scanned).
Is the Role class imported in Memberinfo the correct one ? Maybe you are importing another Role class from another library.
I had tables like Customer, Request and so on and each had ID field;
I have now an abstract
#MappedSuperclass instead that have
#Id
#GeneratedValue
private Long id
field, and all tables extends it with
#AttributeOverride(name="id", column=#Column(name="ID_CUSTOMER"). but now, when I'm trying to add customer to a table, I'm getting exception: Column ID_Customer cannot accept Null value.
when each table had it's own id fields, all works fine.
what's wrong?
Thanks
#MappedSuperclass
public abstract class GeneralEntity implements Serializable,Cloneable{
#Id
#GeneratedValue
#Column(name = "ID")
private Long id;
#Column(name = "CREATED",nullable = false)
#Temporal(TemporalType.TIMESTAMP)
private Date created;
#Column(name = "MODIFIED")
#Temporal(TemporalType.TIMESTAMP)
private Date modified;
//getters,setters
#Entity
#Table(name = "CUSTOMER")
#AttributeOverrides({
#AttributeOverride(name = "id", column = #Column(name="ID_CUSTOMER")),
#AttributeOverride(name="created", column=#Column(name="CUSTOMER_REGISTERED",nullable = false))
})
public class Customer extends GeneralEntity{
// #Column(name = "ID_CUSTOMER")
// #Id
// #GeneratedValue
// private Long id;
#Column(name = "CUSTOMER_EMAIL", nullable = false, length = 25, unique = true, updatable = true)
private String email;
#Column(name="CUSTOMER_PASSWORD", nullable = false)
private String password;
//getters setters
I have a many-to-many relationship which looks like this:
The primary key is combination of three columns and I'm using eclipselink. I created these classes to be able to insert in the join-table :
#Entity
#Table(name = "definition_property")
#NamedQueries({
#NamedQuery(name = "DefinitionProperty.findAll", query = "SELECT d FROM DefinitionProperty d")})
public class DefinitionProperty extends AbstractEntity{
private static final long serialVersionUID = 1L;
#EmbeddedId
protected DefinitionPropertyPK pk;
#JoinColumn(name = "dtid", referencedColumnName = "id", insertable = false, updatable = false)
#ManyToOne(optional = false)
private DefinitionType definitionType;
#JoinColumn(name = "prid", referencedColumnName = "id", insertable = false, updatable = false)
#ManyToOne(optional = false)
private Property property;
#Column(name = "initial_value")
#Basic(optional = false)
private String initialValue;
// setters and getters
}
And PK class:
#Embeddable
public class DefinitionPropertyPK implements Serializable{
#Column(name = "dtid")
private Integer idDt;
#Column(name = "prid")
private Integer idProperty;
#Column(name = "initial_value")
private String initialValue;
//hashcode, equals, setters and getters
}
Entitiy 1:
#Entity
#Table(name = "definition_type")
public class DefinitionType extends AbstractEntity implements EntityItem<Integer> {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Basic(optional = false)
#Column(name = "id")
private Integer idDT;
#Size(max = 45)
#Column(name = "name")
private String dtName;
#Size(max = 45)
#Column(name = "description")
private String description;
#OneToMany(cascade=CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "definitionType")
private List<DefinitionProperty> definitionProperties = new ArrayList<DefinitionProperty>();
}
Entity 2:
#Entity
#Table(name = "property")
public class Property extends AbstractEntity implements EntityItem<Integer>{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.SEQUENCE)
#Basic(optional = false )
#Column(name = "id")
private Integer idProperty;
#Column(name = "name")
#Size(max = 45)
private String propertyName;
#Enumerated(EnumType.STRING)
#Column(name = "type")
private Type fieldType;
#Column(name = "init_value")
#Size(max = 45)
private String initialValue;
#OneToMany(cascade=CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "property")
private List<DefinitionProperty> definitionPeoperties= new ArrayList<DefinitionProperty>();
}
Exception : I get this exception when trying to persist a new DefinitionType:
Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.microsoft.sqlserver.jdbc.SQLServerException: The column name 'initial_value' is specified more than once in the SET clause. A column cannot be assigned more than one value in the same SET clause. Modify the SET clause to make sure that a column is updated only once. If the SET clause updates columns of a view, then the column name 'initial_value' may appear twice in the view definition.
Error Code: 264
Call: INSERT INTO definition_property (initial_value, initial_value, dtid, prid) VALUES (?, ?, ?, ?)
bind => [4 parameters bound]
Question : Why there are two initial_values in the set clause and where am I wrong in my code?
Ref: How do you Set Up a Many-to-Many Relationship with Junction Table using JPA/EclipseLink
Ref: JPA simple many-to-many with eclipselink
Ref: https://giannigar.wordpress.com/2009/09/04/mapping-a-many-to-many-join-table-with-extra-column-using-jpa/