I'm trying to delete a object in Hibernate and for some reason its not getting deleted..
Now, I want to enable the DefaultPersistEventListener and really want to understand what is the problem but im not sure how to do it?
Emp1000 e1 = new Emp1000();
e1.setId(1067);
session.delete(e1);
System.out.println("delete over");
Employee table
#Entity
#NamedQuery(name = "Emp1000.findAll", query = "SELECT e FROM Emp1000 e")
public class Emp1000 implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
private String firstName;
private String lastName;
// bi-directional many-to-one association to EmpDept
// #OneToMany(mappedBy="emp1000")
// #OneToMany(mappedBy="emp1000", cascade = CascadeType.MERGE)// Cascade merge and you need to explicitly save it
#OneToMany(mappedBy = "emp1000", cascade = CascadeType.ALL) // Cascade merge and you need to explicitly save it
#Fetch(FetchMode.SELECT) //Lazy loading
//#Fetch(FetchMode.JOIN)
private List<EmpDept> empDepts;
public Emp1000() {
}
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return this.firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return this.lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public List<EmpDept> getEmpDepts() {
return this.empDepts;
}
public void setEmpDepts(List<EmpDept> empDepts) {
this.empDepts = empDepts;
}
public EmpDept addEmpDept(EmpDept empDept) {
getEmpDepts().add(empDept);
empDept.setEmp1000(this);
return empDept;
}
public EmpDept removeEmpDept(EmpDept empDept) {
getEmpDepts().remove(empDept);
empDept.setEmp1000(null);
return empDept;
}
}
Emp_Dept
#Entity
#Table(name="emp_dept")
#NamedQuery(name="EmpDept.findAll", query="SELECT e FROM EmpDept e")
public class EmpDept implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String dept;
//bi-directional many-to-one association to Emp1000
#ManyToOne
#JoinColumn(name="emp_id")
private Emp1000 emp1000;
public EmpDept() {
}
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public String getDept() {
return this.dept;
}
public void setDept(String dept) {
this.dept = dept;
}
public Emp1000 getEmp1000() {
return this.emp1000;
}
public void setEmp1000(Emp1000 emp1000) {
this.emp1000 = emp1000;
}
}
First you need to make sure your code execute inside the transaction and commit after that. If that is, use session.flush() to synchronized system state with database.
Details are explaining in this thread.
Question about Hibernate session.flush()
Related
I have a next question: while working with Hibernate 3.3.0 run into a situation when I have two tables with one-to-many relationships and I need to get the list of parents. In each entity must be filled the several fields from the parent table and a list of all children mapped in the parent. For the easiest understanding, I give an example. I have two tables with one-to-many relationships: parent is "recipients" and child is "requisites". And I have two classes whose objects are the rows of these tables. Class for the table of recipients:
#Entity
#Table(name = "recipients")
#JsonFilter(value = "recipientsFilter")
public class POJORecipient implements POJO {
private static final long serialVersionUID = 4436819032452218525L;
#Id
#Column
private long id;
#Version
#Column
private long version;
#Column(name = "client_id")
private long clientId;
#Column
private String inn;
#Column
private String name;
#Column(name = "rcpt_country_code")
private String rcptCountryCode;
#Column(name = "rcpt_passp_ser")
private String rcptPasspSer;
#Column(name = "rcpt_passp_num")
private String rcptPasspNum;
#OneToMany(mappedBy = "recipient", fetch = FetchType.LAZY)
#JsonManagedReference
private Set<POJORequisite> requisites = new HashSet<>();
public POJORecipient(){}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public long getVersion() {
return version;
}
public void setVersion(long version) {
this.version = version;
}
public long getClientId() {
return clientId;
}
public void setClientId(long clientId) {
this.clientId = clientId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getInn() {
return inn;
}
public void setInn(String inn) {
this.inn = inn;
}
public String getRcptCountryCode() {
return rcptCountryCode;
}
public void setRcptCountryCode(String rcptCountryCode) {
this.rcptCountryCode = rcptCountryCode;
}
public String getRcptPasspSer() {
return rcptPasspSer;
}
public void setRcptPasspSer(String rcptPasspSer) {
this.rcptPasspSer = rcptPasspSer;
}
public String getRcptPasspNum() {
return rcptPasspNum;
}
public void setRcptPasspNum(String rcptPasspNum) {
this.rcptPasspNum = rcptPasspNum;
}
public Set<POJORequisite> getRequisites() {
return requisites;
}
public void setRequisites(Set<POJORequisite> requisites) {
this.requisites = requisites;
}
}
and for requisites table:
#Entity
#Table(name = "requisites")
public class POJORequisite implements POJO {
private static final long serialVersionUID = -35864567359179960L;
#Id
#Column
private long id;
#Version
#Column
private long version;
#Column
private String bic;
#Column
private String bill;
#Column
private String comments;
#Column
private String note;
#ManyToOne
#JoinColumn(name = "recipient_id")
#JsonBackReference
private POJORecipient recipient;
public POJORequisite(){}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public long getVersion() {
return version;
}
public void setVersion(long version) {
this.version = version;
}
public String getBic() {
return bic;
}
public void setBic(String bic) {
this.bic = bic;
}
public String getBill() {
return bill;
}
public void setBill(String bill) {
this.bill = bill;
}
public String getComments() {
return comments;
}
public void setComments(String comments) {
this.comments = comments;
}
public String getNote() {
return note;
}
public void setNote(String note) {
this.note = note;
}
public POJORecipient getRecipient() {
return recipient;
}
public void setRecipient(POJORecipient recipient) {
this.recipient = recipient;
}
}
So, I want to select from the recipients only names and all mapped requisites. Consequently, after the selection, I will have a list of POJORecipient objects and in each object filled only the field "name" and set of POJORequisite objects.
As answer of my question I want to discover one of next: how can I do that with help HQL or Criteria API (the second variant is preferable), or understand it is impossible in Hibernate at all, or that this possibility appeared in later versions (also preferably with example). I'm trying to resolve this question for several months now and will be immensely grateful for any help. All clarifications and advices also will be so helpful. Thanks in advance!!!
MenuModel
#Entity
#Table(name="M_MENU", uniqueConstraints={#UniqueConstraint(columnNames={"NAME"})})
public class MenuModel {
private Integer id;
private String code;
private String name;
private String controller;
private Integer parent_id;
#Id
#Column(name="ID")
#GeneratedValue(strategy=GenerationType.TABLE, generator="M_MENU")
#TableGenerator(name="M_MENU", table="M_SEQUENCE",
pkColumnName="SEQUENCE_NAME", pkColumnValue="M_MENU_ID",
valueColumnName="SEQUENCE_VALUE", allocationSize=1, initialValue=0
)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
#Column(name="CODE")
public String getCode() {
return code;
}
public void setCode(String kode) {
this.code = kode;
}
#Column(name="NAME")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#Column(name="CONTROLLER")
public String getController() {
return controller;
}
public void setController(String controller) {
this.controller = controller;
}
#Column(name="PARENT_ID")
public Integer getParent_id() {
return parent_id;
}
public void setParent_id(Integer parent_id) {
this.parent_id = parent_id;
}
}
UserAccessModel
#Entity
#Table(name="M_USER_ACCESS")
public class UserAccessModel {
private Integer id;
//join table role
private Integer idRole;
private RoleModel roleModel;
//join table menu
private Integer idMenu;
private MenuModel menuModel;
#Id
#Column(name="ID")
#GeneratedValue(strategy=GenerationType.TABLE, generator="M_USER_ACCESS")
#TableGenerator(name="M_USER_ACCESS", table="M_SEQUENCE",
pkColumnName="SEQUENCE_NAME", pkColumnValue="M_USER_ACCESS_ID",
valueColumnName="SEQUENCE_VALUE", allocationSize=1, initialValue=0
)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
#Column(name="ID_ROLE")
public Integer getIdRole() {
return idRole;
}
public void setIdRole(Integer idRole) {
this.idRole = idRole;
}
#ManyToOne
#JoinColumn(name="ID_ROLE", nullable=true, updatable=false, insertable=false)
public RoleModel getRoleModel() {
return roleModel;
}
public void setRoleModel(RoleModel roleModel) {
this.roleModel = roleModel;
}
#Column(name="ID_MENU")
public Integer getIdMenu() {
return idMenu;
}
public void setIdMenu(Integer idMenu) {
this.idMenu = idMenu;
}
#ManyToOne
#JoinColumn(name="ID_MENU", nullable=true, updatable=false, insertable=false)
public MenuModel getMenuModel() {
return menuModel;
}
public void setMenuModel(MenuModel menuModel) {
this.menuModel = menuModel;
}
}
MenuDaoImpl
#Override
public List<MenuModel> searchByRole(Integer idRole) {
// TODO Auto-generated method stub
Session session = this.sessionFactory.getCurrentSession();
List<MenuModel> menuModelListRole = new ArrayList<MenuModel>();
Criteria userAccessCriteria = session.createCriteria(UserAccessModel.class,"UA");
Criteria menuCriteria = userAccessCriteria.createCriteria("menuModel","M");
userAccessCriteria.add(Restrictions.eq("idRole", ""+idRole+""));
ProjectionList properties = Projections.projectionList();
properties.add(Projections.property("M.id"));
properties.add(Projections.property("M.name"));
properties.add(Projections.property("M.code"));
properties.add(Projections.property("M.controller"));
properties.add(Projections.property("M.parent_id"));
menuCriteria.setProjection(properties);
menuModelListRole = menuCriteria.list();
return menuModelListRole;
}
I want to get result of the following sql:
select M.ID ID, M.NAME NAME, M.CODE CODE, M.CONTROLLER CONTROLLER,
M.PARENT_ID PARENT from M_MENU M join M_USER_ACCESS UA on UA.ID_MENU
= M.ID where UA.ID_ROLE="+idRole+"
I got error in method searchByRole in menuModelListRole = menuCriteria.list();. How can i resolve the problem?
Here private Integer idRole; is of Integer type, but you are passing idRole as String in Restrictions.eq("idRole", ""+idRole+""). SO you are getting java.lang.String cannot be cast to java.lang.Integer in Spring
Changing you restriction value from Restrictions.eq("idRole", ""+idRole+"") to Restrictions.eq("idRole", idRole) should solve your problem.
I just want to explain following scenario.
I have Registration table for employee
It has one field like BranchAddress, and I have using table Branch for that with ManyToOne mapping.
#Entity
#Table(name = "temp_reg")
public class TemporaryRegistrationDTO {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private int ID;
#Column(name = "first_name")
private String firstName;
#Column(name = "last_name")
private String lastName;
#ManyToOne(cascade=CascadeType.ALL)
private BranchDTO companyBranch;
public BranchDTO getCompanyBranch() {
return companyBranch;
}
public void setCompanyBranch(BranchDTO companyBranch) {
this.companyBranch = companyBranch;
}
public int getID() {
return ID;
}
public void setID(int iD) {
ID = iD;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
#Entity
#Table(name = "company_branch")
public class BranchDTO {
#Id
#GeneratedValue ( strategy = GenerationType.AUTO)
private int branchID;
public int getBranchID() {
return branchID;
}
public void setBranchID(int branchID) {
this.branchID = branchID;
}
#ManyToOne(cascade=CascadeType.ALL)
private CountriesDTO country;
#ManyToOne(cascade=CascadeType.ALL)
private StatesDTO state;
public CountriesDTO getCountry() {
return country;
}
public void setCountry(CountriesDTO country) {
this.country = country;
}
public StatesDTO getState() {
return state;
}
public void setState(StatesDTO state) {
this.state = state;
}
}
#Entity
#Table(name = "company_countries")
public class CountriesDTO {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
private String countryCode;
public String getCountryCode() {
return countryCode;
}
public void setCountryCode(String countryCode) {
this.countryCode = countryCode;
}
private String countryName;
public String getCountryName() {
return countryName;
}
public void setCountryName(String countryName) {
this.countryName = countryName;
}
}
#Entity
#Table(name = "company_states")
public class StatesDTO {
#Id
#GeneratedValue ( strategy = GenerationType.AUTO)
private int state_id;
private String state;
private String stateCode;
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getStateCode() {
return stateCode;
}
public void setStateCode(String stateCode) {
this.stateCode = stateCode;
}
#Override
public String toString() {
return "StatesDTO [statesID=" + state_id + ", state=" + state + ", stateCode=" + stateCode + "]";
}
public int getState_id() {
return state_id;
}
public void setState_id(int state_id) {
this.state_id = state_id;
}
}
Now, What I want is that, whenever their is request for registration, Firstly I am checking if Branch Address is available in the Branch table. If it contains an entry already, then it will retrieve Branch row and stooping from same data to Branch Table
Now, to check for BranchDTO, I have created method in Branch Repository class.
#Query("from BranchDTO where country = :country and state = :state")
public BranchDTO existsEntry(#org.springframework.data.repository.query.Param("country") CountriesDTO country,#org.springframework.data.repository.query.Param("state") StatesDTO state);
But It reflects me following error,
object references an unsaved transient instance - save the transient instance before flushing: com.example.demo.pojo.CountriesDTO
Thank you guys
i have a MySQL database which is updated from Java with Entities.
I need a join table between two tables which contains 3 columns.
1 column from table Bar ("bar_id")
2 columns from table Owner ("owner_id", "bought")
Could you please tell me if that is possible or how I could realize that.
I want a join table which looks like this:
'bar_id' | 'owner_id' | 'bought'
--------------------------------
BaseEntity.java
#MappedSuperclass
public class BaseEntity {
private int id;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
public int getId(){ return this.id; }
public void setId(int id){ this.id = id; }
}
Bar.java
#Entity
#Table(name="bar")
public class Bar extends BaseEntity{
private String name;
private String bought;
private List<Fan> fan;
private List<Owner> owner;
#Column(name="name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#Column(name="bought")
public String getBought() {
return bought;
}
public void setBought(String bought) {
this.bought = bought;
}
#ManyToMany(mappedBy="bar", targetEntity=Owner.class)
public List<Owner> getOwner() {
return owner;
}
public void setOwner(List<Owner> owner) {
this.owner = owner;
}
#ManyToMany
#JoinColumn(name="fan")
public List<Fan> getFan() {
return fan;
}
public void setFan(List<Fan> fan) {
this.fan = fan;
}
}
Owner.java
#Entity
#Table(name="owner")
public class Owner extends BaseEntity{
private String firstname;
private String lastname;
private String birthday;
private java.sql.Date bought;
private List<Bar> bar;
#Column(name="firstname")
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
#Column(name="lastname")
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
#Column(name="birthday")
public String getBirthday() {
return birthday;
}
public void setBirthday(String birthday) {
this.birthday = birthday;
}
#Column(name="bought")
public java.sql.Date getBought() {
return bought;
}
public void setBought(java.sql.Date bought) {
this.bought = bought;
}
#ManyToMany
#JoinColumn(name="bar")
public List<Bar> getBar() {
return bar;
}
public void setBar(List<Bar> bar) {
this.bar = bar;
}
}
You can create a Join table by the using #JoinTable annotation.
Please have a look at this post which explains how to achieve it.
How to create join table with JPA annotations?
I have hibernate #OneToMany mapping I am getting the mentioned error. Does not understand the reason. As getters and setters are public
Below are the entities
#Entity
#Table(name="USER_DETAILS")
public class User implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
#Column(name="USER_ID")
#GeneratedValue(strategy=GenerationType.AUTO)
private int id;
#Column(name="USER_FIRSTNAME",nullable=false, length=50)
private String userFirstName;
#Column(name="USER_LASTNAME",nullable=false, length=50)
private String userLastName;
#Column(name="USER_MIDDLENAME",length = 30)
private String userMiddleName;
#Column(name="USER_AGE")
private int userAge;
#Column(name="USER_SEX")
private String userSex;
#OneToMany(cascade=CascadeType.ALL, mappedBy="userAddress", targetEntity=Address.class)
private Set<Address> address = new HashSet<Address>();
public String getUserFirstName() {
return userFirstName;
}
public void setUserFirstName(String userFirstName) {
this.userFirstName = userFirstName;
}
public String getUserLastName() {
return userLastName;
}
public void setUserLastName(String userLastName) {
this.userLastName = userLastName;
}
public String getUserMiddleName() {
return userMiddleName;
}
public void setUserMiddleName(String userMiddleName) {
this.userMiddleName = userMiddleName;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getUserAge() {
return userAge;
}
public void setUserAge(int userAge) {
this.userAge = userAge;
}
public String getUserSex() {
return userSex;
}
public void setUserSex(String userSex) {
this.userSex = userSex;
}
public Set<Address> getAddress() {
return address;
}
public void setAddress(Set<Address> address) {
this.address = address;
}
}
#Entity
#Table(name = "ADDRESS")
public class Address implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
#Column(name = "ADDRESS_ID")
#GeneratedValue(strategy=GenerationType.AUTO)
private int id;
#Column(name = "ZIP_CODE")
private String zipCode;
#Column(name="ADDRESS_USER_ID", insertable=false, updatable=false)
private Long addressUserID;
#Column(name = "ADDRESS_SEC")
private String addressSec;
#Column(name = "STREET")
private String street;
#Column(name = "CITY")
private String city;
#Column(name = "COUNTRY")
private String country;
#ManyToOne(cascade=CascadeType.ALL, targetEntity=User.class)
#JoinColumn(name="ADDRESS_USER_ID")
private Set<User> userAddress = new HashSet<User>();
public Long getAddressUserID() {
return addressUserID;
}
public void setAddressUserID(Long addressUserID) {
this.addressUserID = addressUserID;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getZipCode() {
return zipCode;
}
public void setZipCode(String zipCode) {
this.zipCode = zipCode;
}
public Set<User> getUserAddress() {
return userAddress;
}
public void setUserAddress(Set<User> userAddress) {
this.userAddress = userAddress;
}
public String getStreet() {
return street;
}
public void setStreet(String street) {
this.street = street;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getAddressSec() {
return addressSec;
}
public void setAddressSec(String addressSec) {
this.addressSec = addressSec;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
}
Part of Stack Trace are:
Exception in thread "main" org.hibernate.PropertyAccessException: could not get a field value by reflection getter of com.java.hibernate.practise.User.id at... org.hibernate.property.DirectPropertyAccessor$DirectGetter.get(DirectPropertyAccessor.java:62)
Caused by: java.lang.IllegalArgumentException: Can not set int field com.java.hibernate.practise.User.id to java.util.HashSet...
I am generating the schema using hibernate.hbm2ddl.auto= cerate-drop
Please guide on this.
Generally when we use 1..n bidirectional entity mapping, the owning side which is in general, the many side, should have only a single instance reference to the one side object (not a collection - that would be many to many), and the join column to use is the primary key from the on side class. We don't need to explicitly use the FK column in the many side like you are.
So if this is your relationship User [1]..[N] Address, then you should have something more like
public class User {
...
#OneToMany(mappedBy = "user", cascade=CascadeType.ALL)
private Set<Address> addresses;
}
public class Address {
// private Long addressUserID; // Don't need this property. We get it below
...
#ManyToOne
#JoinColumn(name = "USER_ID")
private User user;
}