java - Spring Data Rest Many to many tree projection mapping -


i have entity called contentpath, may have parent of same type, , sons of same type, represented like:

    @id     @column(name = "id")     @generatedvalue(strategy = generationtype.identity)     private long id;      @column(name = "name", length = 50)     @notnull     private string name;      @column(name = "description")     private string description;      @manytoone     @joincolumn(name="content_path_id")     public contentpath contentpath;      @onetomany(mappedby="contentpath")     public set<contentpath> contentpaths;      @manytomany(fetch = fetchtype.eager)     @jointable(             name = "activity_content_path",             joincolumns = {@joincolumn(name = "content_path_id", referencedcolumnname = "id")},             inversejoincolumns = {@joincolumn(name = "activity_id", referencedcolumnname = "id")})     private set<activity> activities;

i have contentpathrepository, exposes api.

@repositoryrestresource(collectionresourcerel = "contentpaths", path = "contentpaths", excerptprojection = contentpathprojection.class) public interface contentpathrestrepository extends pagingandsortingrepository<contentpath, long> {  }

and projection, should format correctly object.

@projection(name = "contentpathprojection", types = contentpath.class) public interface contentpathprojection {     long getid();     string getname();     set<contentpath> getcontentpaths(); }

i expecting list of contentpaths, have contentpaths inside, , got success, not bringing ids, bringing name , description only, , weird because projection doesn't have description.

current response:

"name": "book 1", "id": 1, "contentpaths": [     {         "name": "unit 1",         "description": "unit 1 description"     },     {         "name": "unit 2",         "description": "unit 2 description"     } ]

why happening? how fix it?

this normal behavior of sdr. don't show id default. turn on register bean this:

@bean public repositoryrestconfigureradapter repositoryrestconfigureradapter() {     return new repositoryrestconfigureradapter() {         @override         public void configurerepositoryrestconfiguration(repositoryrestconfiguration config) {             config.exposeidsfor(contentpath.class);             super.configurerepositoryrestconfiguration(config);         }     }; }

about description - have field:

@column(name = "description") private string description;

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