Java persistence (Ebean) serialize generated value to Json -


i have 2 entities , onetomany relationship between them. first:

@entity public class trip extends model {      ...      @onetomany(cascade = cascadetype.all)     public list<category> categories = new arraylist<>(); }

the second one:

@entity public class category extends model {      ...      @manytoone     public trip trip; }

so, ebean automatically generates trip_id column category table.

now need serialize category entity/object json (with trip_id including). how can it? trying manually create trip_id field, received duplicate exception.

you have one-directional relations. should change them bi-directional. there should be:

@entity public class trip extends model {      ...      @onetomany(cascade = cascadetype.all, mappedby="trip")     public list<category> categories = new arraylist<>(); }  @entity public class category extends model {      ...      @manytoone     public trip trip;      @onetomany(mappedby="category")     public list<place> places = new arraylist<>(); }  @entity public class place extends model {      ...      @manytoone     public category category;  }

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