openjpa is complaining about an incorrect argument for a JPA query that EclipseLink properly handles. EclipseLink returns the set of validation messages for the motor.
Two questions:
1) Is my query wrong and EclipseLink is kindly handling it anyway?
2) Any suggestions on how to restructure the query for openjpa?
Thanks for thinking about my question!
Query
SELECT m.valMessages FROM ThreePhaseMotorInput m WHERE m.id = :id
Actual openjpa exception
Caused by: <openjpa-2.3.0-r422266:1540826 nonfatal user error> org.apache.openjpa.persistence.ArgumentException:
Query projections cannot include array, collection, or map fields.
Invalid query: "SELECT m.valMessages FROM ThreePhaseMotorInput m WHERE m.id = :id"
at org.apache.openjpa.kernel.ExpressionStoreQuery$AbstractExpressionExecutor.assertNotContainer(ExpressionStoreQuery.java:328)
at org.apache.openjpa.kernel.ExpressionStoreQuery$DataStoreExecutor.<init>(ExpressionStoreQuery.java:770)
at org.apache.openjpa.kernel.ExpressionStoreQuery.newDataStoreExecutor(ExpressionStoreQuery.java:179)
at org.apache.openjpa.kernel.QueryImpl.createExecutor(QueryImpl.java:749)
at org.apache.openjpa.kernel.QueryImpl.compileForDataStore(QueryImpl.java:707)
at org.apache.openjpa.kernel.QueryImpl.compileForExecutor(QueryImpl.java:689)
at org.apache.openjpa.kernel.QueryImpl.compile(QueryImpl.java:589)
at org.apache.openjpa.persistence.EntityManagerImpl.createNamedQuery(EntityManagerImpl.java:1038)
at org.apache.openjpa.persistence.EntityManagerImpl.createNamedQuery(EntityManagerImpl.java:1017)
ThreePhaseMotorInput mapping
public class ThreePhaseMotorInput implements IThreePhaseMotorInput, Serializable {
private static final long serialVersionUID = 8084370807289186987L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Version
private Integer version;
private Integer status;
#OneToOne(cascade = CascadeType.ALL, optional = true, targetEntity = UnapprovedThreePhaseMotor.class)
#JoinColumn(name = "unapproved_id")
private IThreePhaseMotor unapprovedMotor;
#OneToOne(cascade = CascadeType.ALL, optional = true, targetEntity = ApprovedThreePhaseMotor.class)
#JoinColumn(name = "approved_id")
private IThreePhaseMotor approvedMotor;
#OneToMany(orphanRemoval = true, cascade = CascadeType.ALL, fetch = FetchType.LAZY, targetEntity = ValidationMessage.class)
#JoinColumn(name = "input_id", referencedColumnName = "id", nullable = false)
#OrderColumn(name = "idx")
private List<IValidationMessage> valMessages;
ValidationMessage mapping
public class ValidationMessage implements Serializable, IValidationMessage {
private static final long serialVersionUID = 8765213112015434057L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "record_id")
private Long recordId;
#Column(name = "field_name")
private String fieldName;
#Column(name = "validation_msg")
private String validationMsg;
private Integer status;
#Column(name = "fail_field")
private String failField;
#Column(name = "error_source")
private Integer errorSource;
Check http://docs.oracle.com/javaee/6/tutorial/doc/bnbuf.html#bnbvx - SELECT clause: A SELECT clause cannot specify a collection-valued expression. For example, the SELECT clause p.teams is invalid because teams is a collection.
But you can use valMessages for INNER/OUTER join and select IValidationMessage entities trough it, e.g.:
SELECT ivm
FROM ThreePhaseMotorInput tpmi
INNER JOIN tpmi.valMessages ivm
WHERE tpmi.id = :id
Related
I want to do select like this in my jpa spring repository
SELECT sicknes_id, count(symptomp_id) as ilosc FROM symptomp_sicknes where symptomp_id IN (1,2) group by sicknes_id Order by ilosc DESC;
My enitity
#Entity
#Table(name = "symptomp")
public class Symptomp {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "symptomp_id")
private Long symptomp_id;
#Column(name = "name")
private String name;
#Column(name = "description")
private String description;
#ManyToMany(cascade = {CascadeType.DETACH,CascadeType.MERGE,CascadeType.PERSIST,CascadeType.REFRESH}, fetch = FetchType.LAZY)
#JoinTable(name = "symptomp_sicknes",joinColumns = #JoinColumn(name = "symptomp_id"),inverseJoinColumns = #JoinColumn(name = "sicknes_id"))
private Set<Sicknes> sicknes = new HashSet<>();
#Entity
#Table(name = "sicknes")
public class Sicknes {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "sicknes_id")
private Long sicknes_id;
#Column(name = "name")
private String name;
#Column(name = "description")
private String description;
#ManyToOne(cascade = {CascadeType.DETACH,CascadeType.MERGE,CascadeType.PERSIST,CascadeType.REFRESH}, fetch = FetchType.LAZY)
#JoinColumn(name = "speciesId")
private Species species;
My Symptomp repository:
public interface SymptompRepository extends JpaRepository<Symptomp, Long> {
#Query("select p from Symptomp p where name like ?1%")
public List<Symptomp> findAllBySymptompName(String symptomp);
public Symptomp findByName(String symptomp);
public List<Symptomp> findByNameIn(List<String> list);
Integer countDistinctSymptompByName(String id);
}
How I can create this select in my JPA repository?
I try get value like in select but i got error mapping bean.
You can get query result as List<Object[]> using nativeQuery=true parameter
#Query("SELECT sicknes_id, count(symptomp_id) as ilosc FROM symptomp_sicknes where symptomp_id IN (1,2) group by sicknes_id Order by ilosc DESC", nativeQuery=true)
List<Object[]> getQueryResult();
Other option is to create dto class with appropriate constructor
public class QueryResultDto {
Long sicknesId;
Long count;
public QueryResultDto(Long sicknesId, Long count) {
this.sicknesId = sicknesId;
this.count = count;
}
}
Then using JPQL
#Query("select new yourproject.dtopath.QueryResultDto(...")
List<QueryResultDto> getQueryResult(#Param("symptompIds") List<Long> symptompIds);
If you want to avoid a native Query the best way is to create an Entity for that JoinTable. Then you can query it easily. Additional benefit if this is that if in future a requirement will pop up that you have to store additional attributes in that relation you will have the Entity already there to do that easily.
I've been struggling with a namedquery for a few days. The named query has an inner join to a 2nd table. One added complexity is that the primary key on the 2nd table is a composite key. I have the two tables simplified here:
Table: aname
nameIdx number(9),
firstName varchar2(40),
lastName varchar2(40),
primary key is nameIdx
Table: aname_role
nameIdx number(9), --foreign key to name table
nameType char(2),
inactiveFlag char(1)
composite primary key is on nameIdx and nameType
I am trying to emulate the following sql query in JPQL:
select * from aname n
left join aname_role nr on n.nameidx=nr.nameidx
where nr.nametype='5'
and nr.inactiveflag='N';
This query works as expected in Oracle returning many records. In Java I have these JPA entities:
#Entity
#Table(name="ANAME")
#NamedQueries({
#NamedQuery(name = "AName.findActiveSalesPersons", query = "SELECT a FROM AName a LEFT JOIN a.aNameRoleList r WHERE r.inactiveflag='N' and r.ANameRolePK.nametype='5' ")})
public class AName implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Basic(optional = false)
#NotNull
#Column(name = "NAMEIDX")
private Integer nameidx;
#Column(name = "FIRSTNAME")
private String firstname;
#Column(name = "LASTNAME")
private String lastname;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "aName")
private List<ANameRole> aNameRoleList;
//getters and setters here
and
#Entity
#Table(name = "ANAME_ROLE")
public class ANameRole implements Serializable {
private static final long serialVersionUID = 1L;
#EmbeddedId
protected ANameRolePK aNameRolePK;
#Basic(optional = false)
#NotNull
#Column(name = "INACTIVEFLAG")
private Character inactiveflag;
#JoinColumn(name = "NAMEIDX", referencedColumnName = "NAMEIDX", insertable = false, updatable = false)
#ManyToOne(optional = false)
private AName aName;
//getters and setters here
There is also a primary key class ANameRolePK
#Embeddable
public class ANameRolePK implements Serializable {
#Basic(optional = false)
#NotNull
#Column(name = "NAMEIDX")
private int nameidx;
#Basic(optional = false)
#NotNull
#Size(min = 1, max = 2)
#Column(name = "NAMETYPE")
private String nametype;
//getters and setters here
With this setup, including the named query specified in the AName entity above, the following returns an empty result list:
em.createNamedQuery("AName.findActiveSalesPersons").getResultList();
Can anyone point me to what I am doing wrong in this named query?
SELECT a FROM AName a LEFT JOIN a.aNameRoleList r WHERE r.inactiveflag='N' and r.aNameRolePK.nametype='5'
Thanks,
Steve
By default, at least using Hibernate, the default fetch type is Lazy, so you need to do a join fetch instead of a join. Also, you should have select distinct. Try:
SELECT distinct a FROM AName a LEFT JOIN fetch a.aNameRoleList r WHERE r.inactiveflag='N' and r.aNameRolePK.nametype='5'
References: Default fetch type for one-to-one, many-to-one and one-to-many in Hibernate
After more testing, I realized the join was working, but not the "r.aNameRolePK.nametype='5'". But if I changed that to "r.aNameRolePK.nameidx=1" it works. So, it was just the nametype field, which we have defined as a char(2) in the database. The problem is with the spaces in a char field and it is discussed here: Java NamedQuery String Problem. It looks like the recommended way to resolve this is to implement an EclipseLink SessionCustomizer. For testing I changed the named query to
SELECT a
FROM AName a LEFT JOIN a.aNameRoleList r
WHERE r.inactiveflag='N' and trim(trailing from r.aNameRolePK.nametype)=5
This returns the expected records.
I need assistance in troubleshooting a relationship / query with EclipseLink 2.5.x provider.
The relationship from ThreePhaseMotorInput to ValidationMessage is supposed to be a uni-directional OneToMany, i.e. each motor can have 0..n messages and in Java object graph ValidationMessage does not have a reference back to ThreePhaseMotorInput.
I am getting an error that JPA can't find the attributes that are part of the ValidationMessage class when accessed via ThreePhaseMotor. (See error text below)
Thanks for thinking about my question!
Query
select msg.validationMsg, COUNT(m.id) from ThreePhaseMotorInput AS m JOIN m.valMessages AS msg GROUP BY msg.validationMsg
Error
org.eclipse.persistence.exceptions.JPQLException:
Exception Description: Problem compiling [select msg.validationMsg, COUNT(m.id) from ThreePhaseMotorInput AS m JOIN m.valMessages AS msg GROUP BY msg.validationMsg].
[7, 24] The state field path 'msg.validationMsg' cannot be resolved to a valid type.
[71, 84] The collection-valued path 'm.valMessages' cannot be resolved to a valid association field.
[119, 136] The state field path 'msg.validationMsg' cannot be resolved to a valid type.
ThreePhaseMotorInput class
#Entity
#Table(name = "three_phase_motor_input")
public class ThreePhaseMotorInput implements IThreePhaseMotorInput, Serializable {
private static final long serialVersionUID = 8084370807289186987L;
#Transient
private final PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this);
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Version
private Integer version;
private Integer status;
#Transient
private Integer numMessages;
#OneToOne(cascade = CascadeType.ALL, optional = true, targetEntity = UnapprovedThreePhaseMotor.class)
#JoinColumn(name = "unapproved_id")
private IThreePhaseMotor unapprovedMotor;
#OneToOne(cascade = CascadeType.ALL, optional = true, targetEntity = ApprovedThreePhaseMotor.class)
#JoinColumn(name = "approved_id")
private IThreePhaseMotor approvedMotor;
#OneToMany(orphanRemoval = true, cascade = CascadeType .ALL, fetch = FetchType.LAZY, targetEntity = ValidationMessage.class)
#JoinColumn(name = "input_id", referencedColumnName = "id", nullable = false)
#OrderColumn(name = "idx")
private List<IValidationMessage> valMessages;
ValidationMessage class
#Entity
#Table(name = "validation_message")
public class ValidationMessage implements Serializable, IValidationMessage {
private static final long serialVersionUID = 8765213112015434057L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "record_id")
private Long recordId;
#Column(name = "field_name")
private String fieldName;
#Column(name = "validation_msg")
private String validationMsg;
private Integer status;
#Column(name = "fail_field")
private String failField;
#Column(name = "error_source")
private Integer errorSource;
The problem seems to be in the following query: select m.approvedMotor, m.valMessages, m.valMessages.validationMsg, count(m.valMessages.id) from ThreePhaseMotorInput m group by m.valMessages.validationMsg.
That query should be a JPQL query, i.e a query where you specify entities and their Java properties. Also you must use JOINs if you want to jump to another entity's properties: m.valMessages.validationMsg is not correct, but INNER JOIN m.valMessages msg GROUP BY msg is correct.
So try the following query:
select m, COUNT(msg) from ThreePhaseMotorInput AS m LEFT JOIN m.valMessages AS msg GROUP BY msg.validationMsg
You can't use a path expression with a Collection value association.
The documentation says: JPQL Path Expressions
It is syntactically illegal to compose a path expression from a path expression that evaluates to a collection.
In your query, m.valMessages is illegal because it references a collection of ValidationMessages.
In the other hand, m.approvedMotor is legal because it is a single value association.
As suggested in Andrei response, you need to modify your query to add another path expression:
select msg.validationMsg, COUNT(m.id) from ThreePhaseMotorInput m JOIN m.valMessages msg GROUP BY msg.validationMsg
you should use JOINs if you want to jump to another entity's properties. try the following JPQL query
select m, COUNT(msg) from ThreePhaseMotorInput AS m LEFT JOIN m.valMessages AS msg GROUP BY msg.validationMsg
I've tried to read through the QueryDSL docs but I am still very confused. I'm accustomed to writing a lot of SQL, but this is my first real crack at using QueryDSL w/ JPQL (JPA2).
I have the following entity:
#Entity
public class Provider implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id")
private Long id;
#Version
#Column(name = "version")
private Integer version;
private String name;
#ManyToMany(cascade=CascadeType.ALL)
#JoinTable(name = "provider_contact", joinColumns = #JoinColumn(name = "contact_id", referencedColumnName = "id"), inverseJoinColumns = #JoinColumn(name = "provider_id", referencedColumnName = "id"))
#OrderColumn
private Collection<Contact> contact;
}
where Contact is a simple entity with an id for a pk.
#Entity
public class Contact {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id")
private Long id;
/**
* User first name
*/
#NotNull
private String firstName;
/**
* User last name
*/
#NotNull
private String lastName;
}
I'm trying to write a query which returns a Contact object given a specific Contact.id and Provider.id. If the Contact object is not a part of the Provider's Contact collection, I'm looking for a null value.
I've tried the following:
public Contact getContact( long providerId, long contactId ){
Predicate p = QProvider.provider.id.eq(providerId).and(QContact.contact.id.eq(contactId));
JPQLQuery query = new JPAQuery(em);
return query.from(QProvider.provider).innerJoin(QProvider.provider.contact).where(p).singleResult(QContact.contact);
}
but I'm getting the following error:
Caused by: java.lang.IllegalArgumentException: Undeclared path 'contact'. Add this path as a source to the query to be able to reference it.
at com.mysema.query.types.ValidatingVisitor.visit(ValidatingVisitor.java:78)
at com.mysema.query.types.ValidatingVisitor.visit(ValidatingVisitor.java:30)
at com.mysema.query.types.PathImpl.accept(PathImpl.java:94)
I'm presuming it has something to do with the fact that my predicate references QContact.contact direction and not part of the QProvider.provider.contact object, but I'm really at a loss as to figure out how this should be done.
Am I even on the right track? I'm not even sure my join is correct either.
This should work
public Contact getContact(long providerId, long contactId) {
QProvider provider = QProvider.provider;
QContact contact = QContact.contact;
return new JPAQuery(em).from(provider)
.innerJoin(provider.contact, contact)
.where(provider.id.eq(providerId), contact.id.eq(contactId))
.singleResult(contact);
}
I have two Entites
#Entity
public Report()
#Id
#Column(name = "REPORT_ID")
private long id;
#JsonIgnore
#ManyToMany(fetch = FetchType.EAGER)
#JoinTable(
name="reports_projects",
joinColumns={#JoinColumn(name="report_id", referencedColumnName="REPORT_ID")},
inverseJoinColumns={#JoinColumn(name="project", referencedColumnName="PROJECT_ID")})
private List<Project> projects;
second is:
#Entity(name = "projects")
public class Project
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "PROJECT_ID")
// seems like spring's jpa has issue hanlde "_" between the words
private long id;
#Column(name = "CODE", nullable = false)
private String code;
#Column(name = "DESCRIPTION", nullable = false)
private String description;
#Column(name = "CREATION_DATE", nullable = false)
private Date creationDate;
i'm tring to query reports by projects.code
tried few stuff like
#Query("select reports from org.jpp.domain.quicksearch.ReportQS reports inner join reports.projects p where p.code in :code")
And
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<QuickSearchResult> query = cb.createQuery(QuickSearchResult.class);
Metamodel m = em.getMetamodel();
EntityType<ReportQS> ReportQSMetaModel = m.entity(ReportQS.class);
Root<ReportQS> reportsQS = query.from(ReportQS.class);
Root<Project> projects = query.from(Project.class);
Join<ReportQS, Project> joinReportsProjects = reportsQS.join("projects");
Predicate condition = cb.equal(projects.get("code"),"gnrl");
query.select(reportsQS).where(condition);
TypedQuery<QuickSearchResult> q = em.createQuery(query);
I get empty result for both of the queries
Any idea how to get this to work ?
Thanks in advance,
Oak
Try following code:
String query = "select r from ReportQS r join r.projects p where p.code = :code";
List<ReportQS> reports = em.createQuery(query,ReportQS.class).setParameter("code","grnl").getResultList();
Make sure that ReportQS is name of entity class (in your sample code you have different class name and different entity name used in query).