diff --git a/lib/models/role.js b/lib/models/role.js
index 4e1d7aa7..c9a7be37 100644
--- a/lib/models/role.js
+++ b/lib/models/role.js
@@ -140,18 +140,29 @@ Role.EVERYONE = "$everyone"; // everyone
 /**
  * Check if a given principal is in the role
  *
+ * @param role
  * @param principalType
  * @param principalId
- * @param role
  * @param callback
  */
-Role.isInRole = function (principalType, principalId, role, callback) {
-  Role.findOne({where: {name: role}}, function (err, role) {
+Role.isInRole = function (role, principalType, principalId, callback) {
+  Role.findOne({where: {name: role}}, function (err, result) {
     if (err) {
       callback && callback(err);
       return;
     }
-    RoleMapping.exists({where: {roleId: role.id, principalType: principalType, principalId: principalId}}, callback);
+    if(!result) {
+      callback && callback(null, false);
+      return;
+    }
+    RoleMapping.findOne({where: {roleId: result.id, principalType: principalType, principalId: principalId}},
+      function (err, result) {
+        if (err) {
+          callback && callback(err);
+          return;
+        }
+        callback && callback(null, !!result);
+      });
   });
 };
 
diff --git a/test/role.test.js b/test/role.test.js
index f94c0cce..acd561d9 100644
--- a/test/role.test.js
+++ b/test/role.test.js
@@ -74,6 +74,47 @@ describe('role model', function () {
 
   });
 
+  it("should support getRoles() and isInRole()", function () {
+    var ds = loopback.createDataSource({connector: 'memory'});
+    User.attachTo(ds);
+    Role.attachTo(ds);
+    RoleMapping.attachTo(ds);
+
+    User.create({name: 'Raymond', email: 'x@y.com', password: 'foobar'}, function (err, user) {
+      // console.log('User: ', user.id);
+      Role.create({name: 'userRole'}, function (err, role) {
+        role.principals.create({principalType: RoleMapping.USER, principalId: user.id}, function (err, p) {
+          // Role.find(console.log);
+          // role.principals(console.log);
+          Role.isInRole('userRole', RoleMapping.USER, user.id, function(err, exists) {
+            assert(!err && exists === true);
+          });
+
+          Role.isInRole('userRole', RoleMapping.APP, user.id, function(err, exists) {
+            assert(!err && exists === false);
+          });
+
+          Role.isInRole('userRole', RoleMapping.USER, 100, function(err, exists) {
+            assert(!err && exists === false);
+          });
+
+          Role.getRoles(RoleMapping.USER, user.id, function(err, roles) {
+            assert.equal(roles.length, 1);
+            assert.equal(roles[0], role.id);
+          });
+          Role.getRoles(RoleMapping.APP, user.id, function(err, roles) {
+            assert.equal(roles.length, 0);
+          });
+          Role.getRoles(RoleMapping.USER, 100, function(err, roles) {
+            assert.equal(roles.length, 0);
+          });
+
+        });
+      });
+    });
+
+  });
+
 });