I have a class Subject as such, Its composite Id is defined in SubjectId class as such, On compiling, I get the error org.hibernate.MappingException: collection foreign key mapping has wrong number of columns: com.example.Subject.students type: component[name,teacher] While this points the error to students element, the error occured after I removed the autogenerated id of Subject, and replaced it with combination
Tag: hibernate
Transform SQL to Hibernate criteria
I am writing a method for retrieving clients with sum of their orders (order.total) higher and less than input values. All its okay, but, sometimes i am get an error: How can i correcting this method, or, maybe, convert this in full criteria style? Answer In the end, i solved this problem by this way, using sql restriction:
How to remove child objects from a @ManyToMany relation with lots of children in JPA and Hibernate
Let’s say I have two entities: Organization and User. Every user can be a member of many organizations and every organization can have many users. Now, I want to remove an organization (let’s say it has 1000 members). When the user has few organizations, this code is ok: But when organization count is 10,000, this solution does not have good
hibernate h2 embeddable list expected “identifier”
I’m trying to associate a list of function (whom Embeddable) within my Employee Entity and H2 seems unhappy with this saying that it expected an “identifier” Caused by: org.h2.jdbc.JdbcSQLException: Syntax error in SQL statement ” CREATE TABLE EMPLOYEE_FUNCTIONS ( EMPLOYEE_EMPLOYEEID VARCHAR(255) NOT NULL, ACTIVE BOOLEAN NOT NULL, DEPARTMENTNUMBER INTEGER NOT NULL, DESCRIPTION VARCHAR(255), ORDER[*] INTEGER NOT NULL ) “; expected
What version of JPA am I using?
I’m using in a apache-tomcat-8.0.41 web service. In this link they say “Hibernate EntityManager implements the programming interfaces and lifecycle rules as defined by the JPA 2.0 specification” https://docs.jboss.org/hibernate/entitymanager/3.6/reference/en/html_single/ But it’s for the 3.6 version. It’s the same for 5.1 ? Answer I suggest you read the docs of the version you are using. As for hibernate and JPA compatibility
How to overcome the FCBL_FIELD_COULD_BE_LOCAL issue in FindBugs?
In FindBugs, I am getting an issue like FCBL_FIELD_COULD_BE_LOCAL on the class name line of this code: How can I resolve this issue? Answer In order to resolve that issue you need to use you fields somewhere in your class. What FindBugs is telling you is that your fields in your class are never used as the fields. How you
@PreUpdate doesn’t save parent object when it’s updated
I have two entities with relation one to many. Parent can have several Child entity instances. I added a field to the parent that stores the date of children modifications(childrenLastModifiedDate). To maintain that, I added method: Here is the problem. It’s not always invoke when the child is saved. Locally(mac os), it works as expected, all three types of changes
Cannot import javax.validation.constraints in IntelliJ IDEA
I can’t import that simple library, i have all jar files, also i tried Ivalidate Caches / Restart. Maybe i have to add validation to build path, but i don’t know to which file. Answer Got it. File -> Project Structure In Modules click Dependecies, then click green “+” on the right side Click JARs or directiories… and add JAR
ORA-02289: sequence does not exist – when using Spring Data JPA with Spring boot
Database being used is Oracle 11g The sequence is present in the specified schema in the database and the same query returns proper value when executed via sql developer. The Auto generation configuration is as follow: Spring JPA configuration is as follow: Answer Kindly check if the user which you are using has the read/write privilege
“Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements”
Good morning Stackoverflow, I have the problem that it gives me the error: Failed to create sessionFactory object.org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: nl.scalda.pasimo.model.employeemanagement.EducationTeam.coachGroups Do you know why? Answer The Exception is straightforward and says : Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements, so the cause