I have a entity call Circuit.
#Entity
public class Circuit implements Comparable<Circuit>, Serializable {
#Column
private String id;
#OneToMany(mappedBy = "circuit", cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true)
private Set<Step> workflow = new HashSet<>();
...
}
I have a class called CircuitLight
public class CircuitLight {
private String id;
private Set<Step> workflow;
/* constructor, getters and setters */
}
In my CircuitRepository, i'm trying to make a projection
#Transactional(readOnly = true)
#Query("select new com.docapost.circuit.CircuitLight(c.id, c.workflow) from Circuit c where c.account.siren = :siren")
Set<CircuitLight> findAllByAccountSirenProjection(#Param("siren") String siren);
When i execute, i have a error message:
could not extract ResultSet; SQL [n/a] com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'circuit0_.id' in 'on clause'
I try with other entity. Every time i have a property with a relation #OneToMany, i have the issue...
Is it possible to make a projection with class (Without use a interface) when there are a relation OneToMany ?
UPDATE:
Step.class
#Entity
public class Step implements Comparable<Step>, Serializable {
private static final List<String> INDEXABLE_PROCESSES = Arrays.asList(
ParapheurWorkflowModel.SERVER,
ParapheurWorkflowModel.SIGN,
ParapheurWorkflowModel.VISA
);
#Id
#GeneratedValue
#Expose
#SerializedName("step_id")
public long id;
#ManyToOne
public Circuit circuit;
#ManyToMany(cascade = CascadeType.ALL)
#JoinTable(joinColumns = #JoinColumn(name = "step_id"), inverseJoinColumns = #JoinColumn(name = "technicalGroup_id"))
private List<TechnicalGroup> technicalGroups = new ArrayList<>();
#Column(name = "step_type", nullable = false)
#Expose
#SerializedName("subprocess_ref")
public String type;
#Column(nullable = false)
public int orderIndex;
/* contructor, getters and setters */
}
UPDATE 2:
Hum.... My bad, in my circuit class, i have a EmbeddedId
#EmbeddedId
private CircuitPK key;
#Embeddable
public static class CircuitPK implements Serializable {
public String id;
public String siren;
}
I try with this code in Step.class
#ManyToOne
#JoinColumns(value = {
#JoinColumn(name = "circuit_siren", referencedColumnName = "siren"),
#JoinColumn(name = "circuit_id", referencedColumnName = "id")
})
public Circuit circuit;
The result is the same
Write the following code in the Step entity
#ManyToOne
#JoinColumn(name="id", nullable=false)
private Circuit circuit;
Related
I use OneToOne in the spring data JPA and I want to delete a record from the Address table without touching the user. But I can't.
If I remove User, in this case Address is removed, that's good.
But how can you delete an Address without touching the User?
https://github.com/myTestPercon/TestCascade
User.Java
#Entity
#Table(name = "user", schema = "testCascade")
public class User implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private Long id;
#Column(name = "name")
private String name;
#OneToOne(mappedBy = "user", cascade = CascadeType.ALL)
private Address address;
// Getter and Setter ...
}
Address.java
#Entity
#Table(name = "address", schema = "testCascade")
public class Address implements Serializable {
#Id
private Long id;
#Column(name = "city")
private String city;
#OneToOne
#MapsId
#JoinColumn(name = "id")
private User user;
// Getter and Setter ...
}
DeleteController.java
#Controller
public class DeleteController {
#Autowired
ServiceJpa serviceJpa;
#GetMapping(value = "/deleteAddressById")
public String deleteAddressById () {
serviceJpa.deleteAddressById(4L);
return "redirect:/home";
}
}
You got your mapping wrong thats all is the problem .
try the below and see
User.java
#Entity
#Table(name = "user", schema = "testCascade")
public class User implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private Long id;
#Column(name = "name")
private String name;
#OneToOne(cascade=CascadeType.ALL)
#JoinColumn(name="foriegn key column in user table for address example.. address_id")
private Address address;
// Getter and Setter ...
}
Address.java
#Entity
#Table(name = "address", schema = "testCascade")
public class Address implements Serializable {
#Id
private Long id;
#Column(name = "city")
private String city;
//name of the address variable in your user class
#OneToOne(mappedBy="address",
cascade={CascadeType.DETACH, CascadeType.MERGE, CascadeType.PERSIST,
CascadeType.REFRESH})
private User user;
// Getter and Setter ...
}
In order to solve this problem, you need to read the hibernate Documentation Hibernate Example 162, Example 163, Example 164.
And also I recommend to look at this is Using #PrimaryKeyJoinColumn annotation in spring data jpa
This helped me in solving this problem.
And also you need to specify the parameter orphanRemoval = true
User.java
#Entity(name = "User")
#Table(name = "user", schema = "testother")
public class User implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private Long id;
#Column(name = "name")
private String name;
#OneToOne(mappedBy = "user", cascade = CascadeType.ALL, orphanRemoval = true)
private Address address;
public void addAddress(Address address) {
address.setUser( this );
this.address = address;
}
public void removeAddress() {
if ( address != null ) {
address.setUser( null );
this.address = null;
}
}
// Getter and Setter
}
Address.java
#Entity(name = "Address")
#Table(name = "address", schema = "testother")
public class Address implements Serializable {
#Id
private Long id;
#Column(name = "city")
private String city;
#OneToOne
#MapsId
#JoinColumn(name = "id")
private User user;
// Getter and Setter
}
DeleteController .java
#Controller
public class DeleteController {
#Autowired
ServiceJpa serviceJpa;
#GetMapping(value = "/deleteUser")
public String deleteUser () {
User user = serviceJpa.findUserById(2L).get();
user.removeAddress();
serviceJpa.saveUser(user);
return "/deleteUser";
}
}
Or make a custom SQL query.
#Repository
public interface DeleteAddress extends JpaRepository<Address, Long> {
#Modifying
#Query("delete from Address b where b.id=:id")
void deleteBooks(#Param("id") Long id);
}
public class Address {
#Id
private Long id;
#MapsId
#JoinColumn(name = "id")
private User user;
}
Rename #JoinColumn(name = "id") to #JoinColumn(name = "user_id")
You can't say that the column that will point to user will be the id of the Address
I have this below entity classes.
Parent Entity:
---------------
public class MLW implements Serializable {
#Id
#Column(name = "mlwId", updatable = false, nullable = false)
private String mlwId;
#OneToOne(optional = false, fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinColumn(name="mlwId")
private MLWJob mlwJob;
private Date createdDate;
private Date lastUpdatedDate;
}
public class MLWJob implements Serializable {
#Id
private String mlwId;
#Column(name = "Id")
#OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinColumn(name="mlwId")
private List<MLWJobItem> items;
}
public class MLWJobItem implements Serializable {
#Id
private String itemId;
#OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinColumn(name="itemId")
private List<MLWJobItemExtension> mlwJobItemExtensions;
}
public class MLWJobItemExtension implements Serializable {
#Id
private String extnId;
#Id
private String itemId;
private String name;
private String value;
}
Repository class:
------------------
public interface MLWRepository extends JpaRepository<MLW, String> {
}
When I try to call save method using above repository I am getting below exception. Could someone help me to understand and fix this issue? TIA
could not delete collection rows:
[com.cpc.wgln.entity.MLWJobItem.mlwJobItemExtensions#0105021001713441];
nested exception is org.hibernate.exception.GenericJDBCException:
could not delete collection rows:
[com.cpc.wgln.entity.MLWJobItem.mlwJobItemExtensions#0105021001713441]
I am trying to use Hibernate to remove an entity however I get an error: Cannot delete or update a parent row: a foreign key constraint fails
The setup is that I have an abstract class A and two classes (B and C) which extend A. B contains a list of C's (unidirectional relationship). And there is a function to delete A by its ID.
Note: Stuff has been removed for brevity.
#Entity
public class B extends A {
#ManyToMany(fetch = FetchType.EAGER)
#JoinTable(
joinColumns = #JoinColumn(name = "B_A_id"),
inverseJoinColumns = #JoinColumn(name = "C_A_id"))
List<C> cList;
}
#Entity
public class C extends A {
(no reference to B)
}
The issue is that when the deleteAByFixedId is called where A is a C, it tries to delete the C before it deletes the B which references it and therefore I get a foreign key constraint failure.
What am I doing wrong?
The answer will still be updated.
Links:
The best way to use the #ManyToMany annotation with JPA and Hibernate
Hibernate Inheritance Mapping
#ManyToMany
Unidirectional example:
User.java
#Entity
public class User {
#Id
#GeneratedValue
#Column(name = "user_id")
private long id;
...
#ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinTable(name = "user_role", joinColumns = #JoinColumn(name = "user_id"), inverseJoinColumns = #JoinColumn(name = "role_id"))
private Set<Role> roles = new HashSet<>();
public void addRoles(Role role) {
roles.add(role);
}
public void removeRoles(Role role) {
roles.remove(role);
}
}
Role.java
#Entity
public class Role {
#Id
#GeneratedValue
#Column(name = "role_id")
private int id;
#Column(name = "role")
private String role;
}
Bidirectional example:
Trader.java:
#Data
#AllArgsConstructor
#NoArgsConstructor
#Entity
#ToString(exclude = "stockmarkets")
#Table(name = "trader")
public class Trader {
#Id
#GeneratedValue
#Column(name = "trader_id")
private Long id;
#Column(name = "trader_name")
private String traderName;
#ManyToMany(fetch = FetchType.LAZY,
cascade = {
CascadeType.PERSIST,
CascadeType.MERGE
})
#JoinTable(name = "TRADER_STOCKMARKET",
joinColumns = { #JoinColumn(name = "trader_id") },
inverseJoinColumns = { #JoinColumn(name = "stockmarket_id") })
private Set<Stockmarket> stockmarkets = new HashSet<>();
/*
We need to add methods below to make everything work correctly
*/
public void addStockmarket(Stockmarket stockmarket) {
stockmarkets.add(stockmarket);
stockmarket.getTraders().add(this);
}
public void removeStockmarket(Stockmarket stockmarket) {
stockmarkets.remove(stockmarket);
stockmarket.getTraders().remove(this);
}
}
Stockmarket.java
#Data
#AllArgsConstructor
#NoArgsConstructor
#Entity
#ToString(exclude = "traders")
#Table(name = "stockmarket")
public class Stockmarket{
#Id
#GeneratedValue
#Column(name = "stockmarket_id")
private Long id;
#Column(name = "stockmarket_name")
private String stockmarketName;
#ManyToMany(mappedBy="stockmarkets")
private Set<Trader> traders = new HashSet<>();
/*
We need to add methods below to make everything work correctly
*/
public void addTrader(Trader trader) {
traders.add(trader);
trader.getStockmarkets().add(this);
}
public void removeTrader(Trader trader) {
traders.remove(trader);
trader.getStockmarkets().remove(this);
}
}
I have two entities in one to many relationship in my spring-data-jpa project.
Parent entity -
#Entity
#Table(name = "code_group")
public class CodeGroup implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE)
private Long id;
#NaturalId
#Column(nullable = false)
private String entityId;
#OneToMany
#JoinColumn(name = "codeGroupId", referencedColumnName = "entityId")
private List<SystemCode> systemCodes;
// .. getters setters
}
Child entity -
#Entity
#Table(name = "system_code")
public class SystemCode implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE)
private Long id;
#Column(nullable = false)
private String codeGroupId;
#Column(nullable = false)
#Enumerated(EnumType.STRING)
private ActiveOrInactive status;
// getters and setters
}
status column is of enum type, it can only have Active or Inactive value.
My existing code works fine. It is fetching code group with associated system codes. I want to filter system code with status='Active'. How to do this?
Try like this:
#OneToMany
#JoinColumn(name = "codeGroupId", referencedColumnName = "entityId")
#Where(clause = "status= 'Active'")
private List<SystemCode> systemCodes;
You can create such methods in your repo:
List<CodeGroup> getAllBySystemCodes_Status(ActiveOrInactive status);
default List<CodeGroup> getAllActive() {
return getAllBySystemCodes_Status(ActiveOrInactive.Active);
}
default List<CodeGroup> getAllInactive() {
return getAllBySystemCodes_Status(ActiveOrInactive.Inactive);
}
I've got 2 entity classes as follows:
#Entity
#Table(name = "USER_ACCT")
public class UserAccount implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.SEQUENCE, generator="USER_ACCT_ID_SEQ")
#SequenceGenerator(name="USER_ACCT_ID_SEQ", sequenceName="USER_ACCT_ID_SEQ")
#Column(name = "USER_ACCT_ID")
protected Long id;
#Basic(optional = false)
#Column(length = 50, unique = true)
private String username;
#Basic(optional = false)
#Column(length = 128, nullable = false)
private String password;
#ManyToMany(targetEntity = UserPermission.class)
#JoinTable(name = "USER_ACCT_PERM",
joinColumns = #JoinColumn(name = "USER_ACCT_ID"),
inverseJoinColumns = #JoinColumn(name = "USER_PERM_ID", referencedColumnName = "USER_PERM_ID"))
private Set<UserPermission> permissions;
// getters and setters...
}
AND
#Entity
#Table(name = "USER_PERM")
public class UserPermission implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.SEQUENCE, generator="USER_PERM_ID_SEQ")
#SequenceGenerator(name="USER_PERM_ID_SEQ", sequenceName="USER_PERM_ID_SEQ")
#Column(name = "USER_PERM_ID")
protected Long id;
#Column(name = "PERM", unique = true, length = 255, nullable = false)
private String authority;
// getters and setters...
}
Now when I create an object of UserAccount and try to save it using the session factory it gives me the following error:
org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.rpm.domain.UserPermission
Shouldn't the UserPermission class be saved by itself??
This is the code that is used to persist:
#Transactional
public void addUser(){
Set<UserPermission> permissions = new HashSet<UserPermission>();
permissions.add(new UserPermission("ROLE_ADMIN"););
sessionFactory.getCurrentSession().save(new UserAccount("admin", "d033e22ae348aeb5660fc2140aec35850c4da997", permissions));
}
Not unless you specify the cascade options.