gregor vojvoda :
I have two entities that have references by id.
One entity is a candidate:
@Entity
@Table(name = "eupass_candidate", schema = "hrast")
public class Candidate{
private long id;
private String firstName;
private String lastName;
private String address;
private String munic;
private String postalCode;
// getters and setters
}
And the other one is
@Entity
@Table(name = "eupass_pdffile", schema = "hrast")
public class PDFFile implements Serializable {
private static final long serialVersionUID = -753514667628201960L;
private long id;
private byte[] pdfFile;
private Long idCandidate;
Now I need to do a join of this two tables and retrieve the candidate first name, last name and the pdf if it has any.
I managed this with the following query:
SELECT fname, lname, pdf_file
FROM hrast.eupass_candidate
LEFT OUTER join hrast.eupass_pdffile
ON (hrast.eupass_candidate.id = hrast.eupass_pdffile.id_candidate)
Finally I would like to save the result in an object and send it to the front end application.
I understand that I can write the query annotation in an extended CrudeReopository, but in witch one.
- Do I need another object
- Or does java let you create an in place object just for this purpose
medkhelifi :
what about this approach?
@Entity
@Table(name = "eupass_pdffile", schema = "hrast")
public class PDFFile implements Serializable {
private static final long serialVersionUID = -753514667628201960L;
private long id;
private byte[] pdfFile;
private Long idCandidate;
//@ManyToMany
@JoinColumn(name="id_candidate") //or whatever your column name is.
private Candidate candidate ;
}