https://github.com/mohuk/ts-jsonapi/issues/11

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ts-jsonapi",
-  "version": "2.1.2",
+  "version": "2.1.3",
   "description": "JSON API (De) Serializer in Typescript",
   "main": "lib/index.js",
   "module": "lib/index.js",

src/deserializer-utils.ts

@@ -21,6 +21,8 @@ export class DeserializerUtils {
         .valueForRelationship;
 
       return valueForRelationshipFct(relationshipData, included);
+    } else if (!included && relationshipData) {
+        return {id: relationshipData.id}
     } else {
       return included;
     }

test/deserializer.js

@@ -370,13 +370,14 @@ describe('JSON API Deserializer', function () {
           }
         }});
 
-        expect(json[1]).to.have.key('id', 'first-name', 'last-name','address');
+        expect(json[1]).to.have.key('id', 'first-name', 'last-name', 'address');
 
         expect(json[1].address).to.be.eql({
           id: '54735697e16624ba1eee36bf',
           'address-line1': '361 Shady Lane',
           'zip-code': '23185',
-          country: 'USA'
+          country: 'USA',
+          lock: {id: "2"}
         });
 
         done();
@@ -545,6 +546,34 @@ describe('JSON API Deserializer', function () {
 
         done(null, json);
       });
+
+      it('return id by default if no included found', function (done) {
+        var dataSet = {
+          data: [{
+            type: 'users',
+            id: '54735750e16638ba1eee59cb',
+            attributes: {
+              'first-name': 'Yevhen',
+              'last-name': 'Baidiuk'
+            },
+            relationships: {
+              address: {
+                data: { type: 'address', id: '66635722e16620ba1eee36af' }
+              }
+            }
+          }]
+        };
+
+        var json = new JSONAPIDeserializer().deserialize(dataSet);
+
+        expect(json).to.be.an('array').with.length(1);
+        expect(json[0]).to.have.key('id', 'first-name', 'last-name', 'address');
+        expect(json[0].address).to.be.eql({
+          id: '66635722e16620ba1eee36af'
+        });
+
+        done(null, json);
+      });
     });
 
     describe('With empty relationship', function () {
@@ -778,6 +807,9 @@ describe('JSON API Deserializer', function () {
             address_line1: '406 Madison Court',
             zip_code: '49426',
             id: '54735722e16620ba1eee36af',
+            country: {
+              id: "54735722e16609ba1eee36af"
+            }
           }
         }
       });