java - Response entity and response in client differ -

i've got spring rest web application. i've got method returns response entity.

@requestmapping(value = "/shoes", method = requestmethod.get, produces = mediatype.application_json_value) public responseentity<?> getshoes() {      collection<shoes> shoes = shoesservice.findall();      responseentity responseentity = new responseentity<>(shoes, httpstatus.ok);     return responseentity; } 

when set breakpoint on last line, can see responseentity contains list of following objects:

shoes{id=1, localization=localization{id=1, city='denver'}, category=category{id=1, name='wellingtons', group='male'}, size=9}

but when send request in client app, json, contains id , size:

{     "id": 1,     "size": 9 } 

i wonder why don't receive localization , category.

here shoes class:

@table(name = "shoes") public class shoes{      @column(name = "id")     @id     @generatedvalue(strategy = generationtype.identity)     private long id;      @jsonbackreference     @manytoone     private localization localization;      @jsonbackreference     @manytoone     private category category;      @column(name = "size")     private int size;      ... } 

if have bi-directional associations, have declare object has role of parent (annotated jsonmanagedreference) , has role of child (annotated jsonbackreference) break cycles.

you annotated both properties (localization, category) not serialized, see jsonbackreference:

annotation used indicate associated property part of two-way linkage between fields; , role "child" (or "back") link. value type of property must bean: can not collection, map, array or enumeration. linkage handled such property annotated annotation not serialized; , during deserialization, value set instance has "managed" (forward) link.