function(postIds) {
        if (!postIds) return;

        var updatedRelations = [];
        // create new relations for that post ids that were not added yet
        _.each(postIds, function(postId) {
          var relation = _.find(that.relations(), function(relation) {
            return ko.unwrap(relation.relatedPost.id) == postId;
          });

          if (!relation) {
            var post = findPost(postId);

            relation = {
              relatedPost: post,
              priority: ko.observable(null),
              id: ko.observable(null)
            };
          }

          updatedRelations.push(relation);
        });

        that.relations(updatedRelations);
      }
function(postIds) {
        if (!postIds) return;

        var updatedRelations = [];
        
        _.each(postIds, function(postId) {
          var relation = _.find(that.relations(), function(relation) {
            return ko.unwrap(relation.relatedPost.id) == postId;
          });

          if (!relation) {
            var post = findPost(postId);

            relation = {
              relatedPost: post,
              priority: ko.observable(null),
              id: ko.observable(null)
            };
          }

          updatedRelations.push(relation);
        });

        that.relations(updatedRelations);
      }
function ( postIds ) { if ( ! postIds ) return ; var updatedRelations = [ ] ; // create new relations for that post ids that were not added yet _ . each ( postIds , function ( postId ) { var relation = _ . find ( that . relations ( ) , function ( relation ) { return ko . unwrap ( relation . relatedPost . id ) == postId ; } ) ; if ( ! relation ) { var post = findPost ( postId ) ; relation = { relatedPost : post , priority : ko . observable ( null ) , id : ko . observable ( null ) } ; } updatedRelations . push ( relation ) ; } ) ; that . relations ( updatedRelations ) ; }
searches the universe with the given index from read() and adds it to the entities connected to the entity
searches the universe with the given index from read () and adds it to the entities connected to the entity