Hello, I have a (owner) one-to-many bidirectional relationship.
A product can have multiple formats, but a format can only be
associated with a product.
public class Product{
@PrimaryKey
@Persistent
private Key id; // string, by application
...
@Persistent(mappedBy = "product")
private List <Format> formats;
}
public class Format{
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id; //numeric, autogenerated
...
@Persistent
private Product producto;
}
Users select a format in a web page (radio button html) and
application (servlet) must load the object identified by id.
My code:
forma = (Format) pm.getObjectById(Format.class, formatId); // formatId
= 985
but I get:
Could not retrieve entity of kind Format with key Format(985)
Datastore Viewer shows a entity with ID/Name column = 985.
How I must load object? What is wrong?
Thank you!
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