loading - Spring Data Rest adding excerpt projection switches off lazy fetching -


i'm new spring data rest , trying play around basic concepts. works far, few days ago noticed application performance dropped after putting projections business.

these entities, repositories , projection

@entity public class item {      @id     @generatedvalue(strategy = table)     private long id;      private string code;      private string name;      @manytoone(targetentity=category.class)     @joincolumn(name="category_id", referencedcolumnname="id")     private category category;      //getters & setters }  @entity public class category {      @id     @generatedvalue(strategy = table)     private long id;      private string name;      @onetomany(mappedby="category", targetentity=item.class, fetch=fetchtype.lazy)     private set<item> items;      //getters & setters }  @repositoryrestresource(excerptprojection=itemexcerpt.class) public interface itemrepository extends crudrepository<item, long>{  }  @repositoryrestresource public interface categoryrepository extends crudrepository<category, long>{  }  @projection(name="excerpt", types=item.class) public interface itemexcerpt {      string getname(); }

so, worked fine untill added excerpt projection itemrepository @repositoryrestresource(excerptprojection=itemexcerpt.class)

before doing this, when hit http://localhost:9191/categories hibernate output expected be:

select         category0_.id id1_0_,         category0_.name name2_0_              category category0_

this output after adding excerptprojection=itemexcerpt.class

hibernate:      select         category0_.id id1_0_,         category0_.name name2_0_              category category0_ hibernate:      select         items0_.category_id category4_1_0_,         items0_.id id1_1_0_,         items0_.id id1_1_1_,         items0_.category_id category4_1_1_,         items0_.code code2_1_1_,         items0_.name name3_1_1_              item items0_              items0_.category_id=?

my conclusion excerpt projection makes lazy fetching being ignored on @onetomany relationship, leads performance drop. know way bypass issue, or maybe expected behaviour?


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