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@OneToMany and @ManyToOne in MongoDB and JPA -EISOneToOneMapping cannot be cast to [message #1064146]

Mon, 17 June 2013 19:55

Michael Hunziker

Messages: 4
Registered: June 2013

Junior Member

Hi all!

We're trying to do a @OneToMany and @ManyToOne relation with EclipseLink/MongoDB:

The @OneToMany declaration looks like this:

@Entity
@NoSql(dataType = "ServiceCatalog", dataFormat = DataFormatType.MAPPED)
public class ServiceCatalog {

@Id
@GeneratedValue
@Field(name = "_id")
private String id;

@OneToMany
private List<ServiceCatalogNeedCategory> serviceCatalogNeedCategories;
...
On the other side, the @ManyToOne declaration:

@Entity
@NoSql(dataType = "NeedCategory", dataFormat = DataFormatType.MAPPED)
public class ServiceCatalogNeedCategory {

@Id
@GeneratedValue
@Field(name = "_id")
private String id;

@Field(name = "title")
private String Title;

@ManyToOne(fetch=FetchType.LAZY)
private ServiceCatalog serviceCatalog;
...
The above configuration leads to the following error: org.eclipse.persistence.eis.mappings.EISOneToOneMapping cannot be cast to org.eclipse.persistence.mappings.OneToOneMapping

We really need to be able to resolve both directions.

Thanks foryour help.

Cheers Michae

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