diff --git a/lib/adapters/memory.js b/lib/adapters/memory.js
index ca24f722..e6f11ffb 100644
--- a/lib/adapters/memory.js
+++ b/lib/adapters/memory.js
@@ -19,7 +19,7 @@ Memory.prototype.define = function defineModel(descr) {
 Memory.prototype.create = function create(model, data, callback) {
     var id = data.id || this.ids[model]++;
     data.id = id;
-    this.cache[model][id] = data;
+    this.cache[model][id] = JSON.stringify(data);
     process.nextTick(function () {
         callback(null, id);
     });
@@ -40,7 +40,7 @@ Memory.prototype.updateOrCreate = function (model, data, callback) {
 };
 
 Memory.prototype.save = function save(model, data, callback) {
-    this.cache[model][data.id] = data;
+    this.cache[model][data.id] = JSON.stringify(data);
     process.nextTick(function () {
         callback(null, data);
     });
@@ -54,7 +54,7 @@ Memory.prototype.exists = function exists(model, id, callback) {
 
 Memory.prototype.find = function find(model, id, callback) {
     process.nextTick(function () {
-        callback(null, this.cache[model][id]);
+        callback(null, id in this.cache[model] && JSON.parse(this.cache[model][id]));
     }.bind(this));
 };
 
@@ -64,8 +64,9 @@ Memory.prototype.destroy = function destroy(model, id, callback) {
 };
 
 Memory.prototype.all = function all(model, filter, callback) {
+    var self = this;
     var nodes = Object.keys(this.cache[model]).map(function (key) {
-        return this.cache[model][key];
+        return JSON.parse(this.cache[model][key]);
     }.bind(this));
 
     if (filter) {
@@ -97,7 +98,11 @@ Memory.prototype.all = function all(model, filter, callback) {
     }
 
     process.nextTick(function () {
-        callback(null, nodes);
+        if (filter && filter.include) {
+            self._models[model].model.include(nodes, filter.include, callback);
+        } else {
+            callback(null, nodes);
+        }
     });
 
     function sorting(a, b) {
@@ -133,6 +138,15 @@ function applyFilter(filter) {
         }
         if (typeof example === 'undefined') return undefined;
         if (typeof value === 'undefined') return undefined;
+        if (typeof example === 'object') {
+            if (example.inq) {
+                if (!value) return false;
+                for (var i = 0; i < example.inq.length; i += 1) {
+                    if (example.inq[i] == value) return true;
+                }
+                return false;
+            }
+        }
         // not strict equality
         return (example !== null ? example.toString() : example) == (value !== null ? value.toString() : value);
     }
@@ -153,7 +167,7 @@ Memory.prototype.count = function count(model, callback, where) {
         data = data.filter(function (id) {
             var ok = true;
             Object.keys(where).forEach(function (key) {
-                if (cache[id][key] != where[key]) {
+                if (JSON.parse(cache[id])[key] != where[key]) {
                     ok = false;
                 }
             });
diff --git a/test/include.test.js b/test/include.test.js
index f8a11b29..53378b65 100644
--- a/test/include.test.js
+++ b/test/include.test.js
@@ -10,10 +10,12 @@ describe('include', function() {
             passports.length.should.be.ok;
             passports.forEach(function(p) {
                 p.__cachedRelations.should.have.property('owner');
-                if (p.ownerId === null) {
-                    should.not.exist(p.__cachedRelations.owner);
+                var owner = p.__cachedRelations.owner;
+                if (!p.ownerId) {
+                    should.not.exist(owner);
                 } else {
-                    p.__cachedRelations.owner.id.should.equal(p.ownerId);
+                    should.exist(owner);
+                    owner.id.should.equal(p.ownerId);
                 }
             });
             done();
@@ -43,9 +45,10 @@ describe('include', function() {
             passports.forEach(function(p) {
                 p.__cachedRelations.should.have.property('owner');
                 var user = p.__cachedRelations.owner;
-                if (p.ownerId === null) {
+                if (!p.ownerId) {
                     should.not.exist(user);
                 } else {
+                    should.exist(user);
                     user.id.should.equal(p.ownerId);
                     user.__cachedRelations.should.have.property('posts');
                     user.__cachedRelations.posts.forEach(function(pp) {
@@ -67,9 +70,10 @@ describe('include', function() {
             passports.forEach(function(p) {
                 p.__cachedRelations.should.have.property('owner');
                 var user = p.__cachedRelations.owner;
-                if (p.ownerId === null) {
+                if (!p.ownerId) {
                     should.not.exist(user);
                 } else {
+                    should.exist(user);
                     user.id.should.equal(p.ownerId);
                     user.__cachedRelations.should.have.property('posts');
                     user.__cachedRelations.posts.forEach(function(pp) {