diff --git a/Makefile b/Makefile
index 179ec182..157e86c4 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@ docs/man/%.3: docs/%.md scripts/doc.sh
 docs/html/%.3.html: docs/%.md scripts/doc.sh docs/footer.html
 	scripts/doc.sh $< $@
 
-docs/html/index.html: docs/jugglingdb.md scripts/doc.sh
+docs/html/index.html: docs/jugglingdb.md scripts/doc.sh docs/footer.html
 	scripts/doc.sh $< $@
 
 man: $(MAN_DOCS)
diff --git a/docs/footer.html b/docs/footer.html
index 288bd0a8..9716797a 100644
--- a/docs/footer.html
+++ b/docs/footer.html
@@ -1,15 +1,21 @@
 <script>
-    var filename = location.href.match(/([^\/]+)?\.3.html(#.*?)?$/)[1];
+    var filename = location.href.match(/([^\/]+)?\.3.html(#.*?)?$/);
+    if (!filename) {
+        filename = [null, 'jugglingdb'];
+    }
     var div = document.createElement('div');
     div.innerHTML = 'Found a typo? ' +
-        linkTo('View', 'blob') + ' and ' +
-        linkTo('edit', 'edit') + ' this file online at GitHub.';
+        linkTo('View', 'blob') +
+        ' and ' +
+        'edit' +
+        //linkTo('edit', 'edit') +
+        ' this file online at GitHub.';
 
     document.getElementById('man').appendChild(div);
 
     function linkTo(text, dir) {
         return '<a href="https://github.com/1602/jugglingdb/' +
-            dir + '/master/docs/' + filename + '.md">' + text + '</a>';
+            dir + '/master/docs/' + filename[1] + '.md">' + text + '</a>';
     }
 
     addLink('h3', '&para;');
diff --git a/docs/hooks.md b/docs/hooks.md
index 0026eb8e..d2df1aef 100644
--- a/docs/hooks.md
+++ b/docs/hooks.md
@@ -1,2 +1,135 @@
 jugglingdb-hooks(3) - Hooks and object lifecycle.
-==================
+===================
+
+## DESCRIPTION
+
+Hook is a class method called on object when some event happens. List of events:
+
+* `initialize`:
+Called after `new Model` called.
+
+* `create`:
+Called before and after create.
+
+* `update`:
+Called before and after save (except create).
+
+* `save`:
+Called before and after save (including both create and update).
+
+* `validate`:
+Called before and after validations.
+
+* `destroy`:
+Called before and after destroy on instance.
+
+
+Each hook except `initialize` accepts callback as first argument. This callback
+should be called when hook done. All hooks called on object instance, but it's
+not recommended to use `this` for updating in all hooks where data argument
+available (second argument for all data-related before-hooks: save, update,
+create).
+
+## INITIALIZE
+
+Initialize hook called when new object created after all setters and default
+being applied.
+
+    Model.afterInitialize = function() {
+        this.property = 'some value;
+        console.log('afterInitialize called');
+    };
+    new Model; // afterInitialize called
+
+## CREATE
+
+Create hooks called when object created.
+The `beforeCreate` hook accepts `data` as a second argument.
+
+    Model.beforeCreate = function(next, data) {
+        // use data argument to update object
+        data.createdAt = new Date();
+        console.log('before');
+        next();
+    };
+
+    Model.afterCreate = function(next) {
+        this.notifySocialNetworks();
+        this.sendEmailNotifications();
+        console.log('after');
+        next();
+    };
+
+    Model.create({foo: 'bar'}, function(err, model) {
+        console.log('callback');
+    });
+
+Example output will be:
+
+    before
+    after
+    callback
+
+## UPDATE
+
+Update hooks called on each save except create. 
+The `beforeUpdate` hook accepts data as second argument.
+Data argument only containing actual data for update, not full object data.
+
+    Model.beforeUpdate = function(next, data) {
+        // use data argument to update object
+        // in update hook data argumen only contains data for update (not
+        // full object)
+        data.updatedAt = new Date();
+        console.log('before');
+        next();
+    };
+
+    Model.afterUpdate = function(next) {
+        this.scheduleFulltextIndexUpdate();
+        console.log('after');
+        next();
+    };
+
+    model.updateAttributes({foo: 'bar'}, function(err, model) {
+        console.log('callback');
+    });
+
+Example output will be:
+
+    before
+    after
+    callback
+
+## SAVE
+
+Save hooks called on each save, both update and create.
+The `beforeSave` hook accepts `data` as a second argument.
+For `beforeSave` hook `data` argument is the same as `this`.
+
+    Model.beforeSave = function(next, data) {
+        if ('string' !== typeof data.tags) {
+            data.tags = JSON.stringify(data.tags);
+        }
+        next();
+    };
+
+    Model.afterSave = function(next) {
+        next();
+    };
+
+## DESTROY
+
+Destroy hooks called when `model.destroy()` called. Please note that
+`destroyAll` method doesn't call destroy hooks.
+
+## VALIDATE
+
+Validate hooks callen before and after validation and should be used for data
+modification and not for validation. Use custom validation described in
+jugglingdb-validations(3) man section.
+
+## SEE ALSO
+
+jugglingdb-model(3)
+jugglingdb-validations(3)
diff --git a/docs/model.md b/docs/model.md
index 11578966..595bb826 100644
--- a/docs/model.md
+++ b/docs/model.md
@@ -109,9 +109,70 @@ count filtered set of records. Callback called with error and count arguments.
         console.log(count); // count of approved users stored in database
     });
 
-## ESSENTIALS
+## RELATIONS
 
-### Default values
+### hasMany
+
+Define all necessary stuff for "one to many" relation:
+
+* foreign key in "many" model
+* named scope in "one" model
+
+Example:
+
+    var Book = db.define('Book');
+    var Chapter = db.define('Chapters');
+
+    // syntax 1 (old):
+    Book.hasMany(Chapter);
+    // syntax 2 (new):
+    Book.hasMany('chapters');
+
+Syntax 1 and 2 does same things in different ways: adds `chapters` method to
+`Book.prototype` and add `bookId` property to `Chapter` model. Foreign key name
+(`bookId`) could be specified manually using second param:
+
+    Book.hasMany('chapters', {foreignKey: `chapter_id`});
+
+When using syntax 2 jugglingdb looking for model with singularized name:
+
+    'chapters' => 'chapter' => 'Chapter'
+
+But it's possible to specify model manually using second param:
+
+    Book.hasMany('stories', {model: Chapter});
+
+Syntax 1 allows to override scope name using `as` property of second param:
+
+    Book.hasMany(Chapter, {as: 'stories'});
+
+**Scope methods** created on BaseClass by hasMany allows to build, create and
+query instances of other class. For example:
+
+    Book.create(function(err, book) {
+        // using 'chapters' scope for build:
+        var c = book.chapters.build({name: 'Chapter 1'});
+        // same as:
+        c = new Chapter({name: 'Chapter 1', bookId: book.id});
+        // using 'chapters' scope for create:
+        book.chapters.create();
+        // same as:
+        Chapter.create({bookId: book.id});
+
+        // using scope for querying:
+        book.chapters(function() {/* all chapters with bookId = book.id */ });
+        book.chapters({where: {name: 'test'}, function(err, chapters) {
+            // all chapters with bookId = book.id and name = 'test'
+        });
+    });
+
+### belongsTo
+
+TODO: document
+
+### hasAndBelongsToMany
+
+TODO: implement and document
 
 ## SEE ALSO
 
diff --git a/lib/adapters/memory.js b/lib/adapters/memory.js
index fbd748cc..ca24f722 100644
--- a/lib/adapters/memory.js
+++ b/lib/adapters/memory.js
@@ -70,11 +70,6 @@ Memory.prototype.all = function all(model, filter, callback) {
 
     if (filter) {
 
-        // do we need some filtration?
-        if (filter.where) {
-            nodes = nodes ? nodes.filter(applyFilter(filter)) : nodes;
-        }
-
         // do we need some sorting?
         if (filter.order) {
             var props = this._models[model].properties;
@@ -87,12 +82,18 @@ Memory.prototype.all = function all(model, filter, callback) {
                 var m = key.match(/\s+(A|DE)SC$/i);
                 if (m) {
                     key = key.replace(/\s+(A|DE)SC/i, '');
-                    if (m[1] === 'DE') reverse = -1;
+                    if (m[1].toLowerCase() === 'de') reverse = -1;
                 }
                 orders[i] = {"key": key, "reverse": reverse};
             });
             nodes = nodes.sort(sorting.bind(orders));
         }
+
+        // do we need some filtration?
+        if (filter.where) {
+            nodes = nodes ? nodes.filter(applyFilter(filter)) : nodes;
+        }
+
     }
 
     process.nextTick(function () {
@@ -108,7 +109,7 @@ Memory.prototype.all = function all(model, filter, callback) {
             }
         }
         return 0;
-     }
+    }
 };
 
 function applyFilter(filter) {
diff --git a/lib/model.js b/lib/model.js
index d1b50a1b..bac516df 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -512,6 +512,12 @@ AbstractClass.include = function (objects, include, cb) {
         }
         var relation = relations[relationName];
 
+        if (!relation) {
+            return function() {
+                cb(new Error('Relation "' + relationName + '" is not defined for ' + self.modelName + ' model'));
+            }
+        }
+
         var req = {'where': {}};
 
         if (!keyVals[relation.keyFrom]) {
@@ -954,12 +960,26 @@ AbstractClass.hasMany = function hasMany(anotherClass, params) {
  * This optional parameter default value is false, so the related object will be loaded from cache if available.
  */
 AbstractClass.belongsTo = function (anotherClass, params) {
-    var methodName = params.as;
-    var fk = params.foreignKey;
+    params = params || {};
+    if ('string' === typeof anotherClass) {
+        params.as = anotherClass;
+        if (params.model) {
+            anotherClass = params.model;
+        } else {
+            var anotherClassName = anotherClass.toLowerCase();
+            for(var name in this.schema.models) {
+                if (name.toLowerCase() === anotherClassName) {
+                    anotherClass = this.schema.models[name];
+                }
+            }
+        }
+    }
+    var methodName = params.as || i8n.camelize(anotherClass.modelName, true);
+    var fk = params.foreignKey || methodName + 'Id';
 
     this.relations[params['as']] = {
         type: 'belongsTo',
-        keyFrom: params['foreignKey'],
+        keyFrom: fk,
         keyTo: 'id',
         modelTo: anotherClass,
         multiple: false
diff --git a/test/basic-querying.test.js b/test/basic-querying.test.js
new file mode 100644
index 00000000..e4a58f6b
--- /dev/null
+++ b/test/basic-querying.test.js
@@ -0,0 +1,249 @@
+var db, User, should = require('should');
+
+describe('basic-querying', function() {
+
+    before(function(done) {
+        db = getSchema();
+
+        User = db.define('User', {
+            name: String,
+            email: {type: String, index: true},
+            role: {type: String, index: true},
+            order: {type: Number, index: true}
+        });
+
+        db.automigrate(done);
+
+    });
+
+
+    describe('find', function() {
+
+        before(function(done) {
+            User.destroyAll(done);
+        });
+
+        it('should query by id: not found', function(done) {
+            User.find(1, function(err, u) {
+                should.not.exist(u);
+                should.not.exist(err);
+                done();
+            });
+        });
+
+        it('should query by id: found', function(done) {
+            User.create(function(err, u) {
+                should.exist(u.id);
+                User.find(u.id, function(err, u) {
+                    should.exist(u);
+                    should.not.exist(err);
+                    u.should.be.an.instanceOf(User);
+                    done();
+                });
+            });
+        });
+
+    });
+
+    describe('all', function() {
+
+        before(seed);
+
+        it('should query collection', function(done) {
+            User.all(function(err, users) {
+                should.exists(users);
+                should.not.exists(err);
+                users.should.have.lengthOf(6);
+                done();
+            });
+        });
+
+        it('should query filtered collection', function(done) {
+            User.all({where: {role: 'lead'}}, function(err, users) {
+                should.exists(users);
+                should.not.exists(err);
+                users.should.have.lengthOf(2);
+                done();
+            });
+        });
+
+        it('should query collection sorted by numeric field', function(done) {
+            User.all({order: 'order'}, function(err, users) {
+                should.exists(users);
+                should.not.exists(err);
+                users.forEach(function(u, i) {
+                    u.order.should.eql(i + 1);
+                });
+                done();
+            });
+        });
+
+        it('should query collection desc sorted by numeric field', function(done) {
+            User.all({order: 'order DESC'}, function(err, users) {
+                should.exists(users);
+                should.not.exists(err);
+                users.forEach(function(u, i) {
+                    u.order.should.eql(users.length - i);
+                });
+                done();
+            });
+        });
+
+        it('should query collection sorted by string field', function(done) {
+            User.all({order: 'name'}, function(err, users) {
+                should.exists(users);
+                should.not.exists(err);
+                users.shift().name.should.equal('George Harrison');
+                users.shift().name.should.equal('John Lennon');
+                users.pop().name.should.equal('Stuart Sutcliffe');
+                done();
+            });
+        });
+
+        it('should query collection desc sorted by string field', function(done) {
+            User.all({order: 'name DESC'}, function(err, users) {
+                should.exists(users);
+                should.not.exists(err);
+                users.pop().name.should.equal('George Harrison');
+                users.pop().name.should.equal('John Lennon');
+                users.shift().name.should.equal('Stuart Sutcliffe');
+                done();
+            });
+        });
+
+    });
+
+    describe('count', function() {
+
+        before(seed);
+
+        it('should query total count', function(done) {
+            User.count(function(err, n) {
+                should.not.exist(err);
+                should.exist(n);
+                n.should.equal(6);
+                done();
+            });
+        });
+
+        it('should query filtered count', function(done) {
+            User.count({role: 'lead'}, function(err, n) {
+                should.not.exist(err);
+                should.exist(n);
+                n.should.equal(2);
+                done();
+            });
+        });
+    });
+
+    describe('findOne', function() {
+
+        before(seed);
+
+        it('should find first record (default sort by id)', function(done) {
+            User.all({sort: 'id'}, function(err, users) {
+                User.findOne(function(e, u) {
+                    should.not.exist(e);
+                    should.exist(u);
+                    u.id.should.equal(users[0].id);
+                    done();
+                });
+            });
+        });
+
+        it('should find first record', function(done) {
+            User.findOne({order: 'order'}, function(e, u) {
+                should.not.exist(e);
+                should.exist(u);
+                u.order.should.equal(1);
+                u.name.should.equal('Paul McCartney');
+                done();
+            });
+        });
+
+        it('should find last record', function(done) {
+            User.findOne({order: 'order DESC'}, function(e, u) {
+                should.not.exist(e);
+                should.exist(u);
+                u.order.should.equal(6);
+                u.name.should.equal('Ringo Starr');
+                done();
+            });
+        });
+
+        it('should find last record in filtered set', function(done) {
+            User.findOne({
+                where: {role: 'lead'},
+                order: 'order DESC'
+            }, function(e, u) {
+                should.not.exist(e);
+                should.exist(u);
+                u.order.should.equal(2);
+                u.name.should.equal('John Lennon');
+                done();
+            });
+        });
+
+    });
+
+    describe('exists', function() {
+
+        before(seed);
+
+        it('should check whether record exist', function(done) {
+            User.findOne(function(e, u) {
+                User.exists(u.id, function(err, exists) {
+                    should.not.exist(err);
+                    should.exist(exists);
+                    exists.should.be.ok;
+                    done();
+                });
+            });
+        });
+
+        it('should check whether record not exist', function(done) {
+            User.destroyAll(function() {
+                User.exists(42, function(err, exists) {
+                    should.not.exist(err);
+                    exists.should.not.be.ok;
+                    done();
+                });
+            });
+        });
+
+    });
+
+
+});
+
+function seed(done) {
+    var count = 0;
+    var beatles = [
+        {
+            name: 'John Lennon',
+            mail: 'john@b3atl3s.co.uk',
+            role: 'lead',
+            order: 2
+        }, {
+            name: 'Paul McCartney',
+            mail: 'paul@b3atl3s.co.uk',
+            role: 'lead',
+            order: 1
+        },
+        {name: 'George Harrison', order: 5},
+        {name: 'Ringo Starr', order: 6},
+        {name: 'Pete Best', order: 4},
+        {name: 'Stuart Sutcliffe', order: 3}
+    ];
+    User.destroyAll(function() {
+        beatles.forEach(function(beatle) {
+            User.create(beatle, ok);
+        });
+    });
+
+    function ok() {
+        if (++count === beatles.length) {
+            done();
+        }
+    }
+}
diff --git a/test/common.batch.js b/test/common.batch.js
new file mode 100644
index 00000000..9f0b4e40
--- /dev/null
+++ b/test/common.batch.js
@@ -0,0 +1,2 @@
+require('./basic-querying.test.js');
+require('./hooks.test.js');
diff --git a/test/common_test.js b/test/common_test.js
index f6b085c0..34d28ed0 100644
--- a/test/common_test.js
+++ b/test/common_test.js
@@ -209,42 +209,6 @@ function testOrm(schema) {
         test.done();
     });
 
-    it('should be exported to JSON', function (test) {
-        var outString = '{"title":"hello, json","date":1,"published":false,"likes":[],"related":[],"id":1}'
-        if (schema.name === 'nano')
-            outString = '{"title":"hello, json","subject":null,"content":null,"date":1,"published":false,"likes":[],"related":[],"_rev":null,"id":1,"userId":null}'
-        
-        test.equal(JSON.stringify(new Post({id: 1, title: 'hello, json', date: 1})),outString);
-        test.done();
-    });
-
-    it('should create object', function (test) {
-        Post.create(function (err, post) {
-            if (err) throw err;
-            test.ok(post.id, 'Id present');
-            test.ok(!post.title, 'Title is blank');
-            Post.exists(post.id, function (err, exists) {
-                if (err) throw err;
-                test.ok(exists);
-                test.done();
-            });
-        });
-    });
-
-    it('should create object without callback', function (test) {
-        var uniqueTitle = 'Unique title ' + Date.now();
-        Post.create({title: uniqueTitle});
-
-        setTimeout(delayedCallback, 100);
-
-        function delayedCallback() {
-            Post.all({where: {title: uniqueTitle}}, function (err, posts) {
-                test.equal(posts.length, 1);
-                test.done();
-            });
-        }
-    });
-
     it('should save object', function (test) {
         var title = 'Initial title', title2 = 'Hello world',
             date = new Date;
@@ -420,53 +384,6 @@ function testOrm(schema) {
         });
     });
 
-    it('should fetch count of records in collection', function (test) {
-        Post.count(function (err, count) {
-            console.log(countOfposts, count);
-            test.equal(countOfposts, count, 'unfiltered count');
-            Post.count({title: 'title'}, function (err, count) {
-                console.log(countOfpostsFiltered, count, 'filtered count');
-                test.equal(countOfpostsFiltered, count, 'filtered count');
-                test.done();
-            });
-        });
-    });
-
-    it('should find filtered set of records', function (test) {
-        var wait = 1;
-
-        // exact match with string
-        Post.all({where: {title: 'New title'}}, function (err, res) {
-            var pass = true;
-            res.forEach(function (r) {
-                if (r.title != 'New title') pass = false;
-            });
-            test.ok(res.length > 0, 'Exact match with string returns dataset');
-            test.ok(pass, 'Exact match with string');
-            done();
-        });
-
-        // matching null
-        // Post.all({where: {title: null}}, function (err, res) {
-
-        //     var pass = true;
-        //     res.forEach(function (r) {
-        //         if (r.title != null) pass = false;
-        //     });
-        //     test.ok(res.length > 0, 'Matching null returns dataset');
-        //     test.ok(pass, 'Matching null');
-        //     done();
-        // });
-
-        function done() {
-            if (--wait === 0) {
-                test.done();
-            }
-        }
-
-    });
-
-
     it('should find records filtered with multiple attributes', function (test) {
         var d = new Date;
         Post.create({title: 'title', content: 'content', published: true, date: d}, function (err, post) {
@@ -661,252 +578,6 @@ function testOrm(schema) {
         };
     });
 
-    if (
-            schema.name === 'mysql' ||
-            schema.name === 'sqlite3' ||
-            schema.name === 'postgres'
-        )
-    it('should handle include function', function (test) {
-        var createdUsers = [];
-        var createdPassports = [];
-        var createdPosts = [];
-        var context = null;
-
-        createUsers();
-        function createUsers() {
-            clearAndCreate(
-                User,
-                [
-                    {name: 'User A', age: 21},
-                    {name: 'User B', age: 22},
-                    {name: 'User C', age: 23},
-                    {name: 'User D', age: 24},
-                    {name: 'User E', age: 25}
-                ],
-                function(items) {
-                    createdUsers = items;
-                    createPassports();
-                }
-            );
-        }
-
-        function createPassports() {
-            clearAndCreate(
-                Passport,
-                [
-                    {number: '1', ownerId: createdUsers[0].id},
-                    {number: '2', ownerId: createdUsers[1].id},
-                    {number: '3'}
-                ],
-                function(items) {
-                    createdPassports = items;
-                    createPosts();
-                }
-            );
-        }
-
-        function createPosts() {
-            clearAndCreate(
-                Post,
-                [
-                    {title: 'Post A', userId: createdUsers[0].id},
-                    {title: 'Post B', userId: createdUsers[0].id},
-                    {title: 'Post C', userId: createdUsers[0].id},
-                    {title: 'Post D', userId: createdUsers[1].id},
-                    {title: 'Post E'}
-                ],
-                function(items) {
-                    createdPosts = items;
-                    makeTests();
-                }
-            );
-        }
-
-        function makeTests() {
-            var unitTests = [
-                function() {
-                    context = ' (belongsTo simple string from passports to users)';
-                    Passport.all({include: 'owner'}, testPassportsUser);
-                },
-                function() {
-                    context = ' (belongsTo simple string from posts to users)';
-                    Post.all({include: 'author'}, testPostsUser);
-                },
-                function() {
-                    context = ' (belongsTo simple array)';
-                    Passport.all({include: ['owner']}, testPassportsUser);
-                },
-                function() {
-                    context = ' (hasMany simple string from users to posts)';
-                    User.all({include: 'posts'}, testUsersPosts);
-                },
-                function() {
-                    context = ' (hasMany simple string from users to passports)';
-                    User.all({include: 'passports'}, testUsersPassports);
-                },
-                function() {
-                    context = ' (hasMany simple array)';
-                    User.all({include: ['posts']}, testUsersPosts);
-                },
-                function() {
-                    context = ' (Passports - User - Posts in object)';
-                    Passport.all({include: {'owner': 'posts'}}, testPassportsUserPosts);
-                },
-                function() {
-                    context = ' (Passports - User - Posts in array)';
-                    Passport.all({include: [{'owner': 'posts'}]}, testPassportsUserPosts);
-                },
-                function() {
-                    context = ' (Passports - User - Posts - User)';
-                    Passport.all({include: {'owner': {'posts': 'author'}}}, testPassportsUserPosts);
-                },
-                function() {
-                    context = ' (User - Posts AND Passports)';
-                    User.all({include: ['posts', 'passports']}, testUsersPostsAndPassports);
-                }
-            ];
-
-            function testPassportsUser(err, passports, callback) {
-                testBelongsTo(passports, 'owner', callback);
-            }
-
-            function testPostsUser(err, posts, callback) {
-                testBelongsTo(posts, 'author', callback);
-            }
-
-            function testBelongsTo(items, relationName, callback) {
-                if (typeof callback === 'undefined') {
-                    callback = nextUnitTest;
-                }
-                var nbInitialRequests = nbSchemaRequests;
-                var nbItemsRemaining = items.length;
-
-                for (var i = 0; i < items.length; i++) {
-                    testItem(items[i]);
-                }
-
-                function testItem(item) {
-                    var relation = item.constructor.relations[relationName];
-                    var modelNameFrom = item.constructor.modelName;
-                    var modelNameTo = relation.modelTo.modelName;
-                    item[relationName](function(err, relatedItem) {
-                        if (relatedItem !== null) {
-                            test.equal(relatedItem[relation.keyTo], item[relation.keyFrom], modelNameTo + '\'s instance match ' + modelNameFrom + '\'s instance' + context);
-                        } else {
-                            test.ok(item[relation.keyFrom] == null, 'User match passport even when user is null.' + context);
-                        }
-                        nbItemsRemaining--;
-                        if (nbItemsRemaining == 0) {
-                            requestsAreCounted && test.equal(nbSchemaRequests, nbInitialRequests, 'No more request have been executed for loading ' + relationName + ' relation' + context)
-                            callback();
-                        }
-                    });
-                }
-            }
-
-            function testUsersPosts(err, users, expectedUserNumber, callback) {
-                if (typeof expectedUserNumber === 'undefined') {
-                    expectedUserNumber = 5;
-                }
-                test.equal(users.length, expectedUserNumber, 'Exactly ' + expectedUserNumber + ' users returned by query' + context);
-                testHasMany(users, 'posts', callback);
-            }
-
-            function testUsersPassports(err, users, callback) {
-                testHasMany(users, 'passports', callback);
-            }
-
-            function testHasMany(items, relationName, callback) {
-                if (typeof callback === 'undefined') {
-                    callback = nextUnitTest;
-                }
-                var nbInitialRequests = nbSchemaRequests;
-                var nbItemRemaining = items.length;
-                for (var i = 0; i < items.length; i++) {
-                    testItem(items[i]);
-                }
-
-                function testItem(item) {
-                    var relation = item.constructor.relations[relationName];
-                    var modelNameFrom = item.constructor.modelName;
-                    var modelNameTo = relation.modelTo.modelName;
-                    item[relationName](function(err, relatedItems) {
-                        for (var j = 0; j < relatedItems.length; j++) {
-                            test.equal(relatedItems[j][relation.keyTo], item[relation.keyFrom], modelNameTo + '\'s instances match ' + modelNameFrom + '\'s instance' + context);
-                        }
-                        nbItemRemaining--;
-                        if (nbItemRemaining == 0) {
-                            requestsAreCounted && test.equal(nbSchemaRequests, nbInitialRequests, 'No more request have been executed for loading ' + relationName + ' relation' + context)
-                            callback();
-                        }
-                    });
-                }
-            }
-
-            function testPassportsUserPosts(err, passports) {
-                testPassportsUser(err, passports, function() {
-                    var nbPassportsRemaining = passports.length;
-                    for (var i = 0; i < passports.length; i++) {
-                        if (passports[i].ownerId !== null) {
-                            passports[i].owner(function(err, user) {
-                                testUsersPosts(null, [user], 1, function() {
-                                    nextPassport();
-                                });
-                            });
-                        } else {
-                            nextPassport();
-                        }
-                    }
-                    function nextPassport() {
-                        nbPassportsRemaining--
-                        if (nbPassportsRemaining == 0) {
-                            nextUnitTest();
-                        }
-                    }
-                });
-            }
-
-            function testUsersPostsAndPassports(err, users) {
-                testUsersPosts(err, users, 5, function() {
-                    testUsersPassports(err, users, function() {
-                        nextUnitTest();
-                    });
-                });
-            }
-
-            var testNum = 0;
-            function nextUnitTest() {
-                if (testNum >= unitTests.length) {
-                    test.done();
-                    return;
-                }
-                unitTests[testNum]();
-                testNum++;
-
-            }
-
-            nextUnitTest();
-        }
-
-    });
-
-    it('should destroy all records', function (test) {
-        Post.destroyAll(function (err) {
-            if (err) {
-                console.log('Error in destroyAll');
-                console.log(err);
-                throw err;
-            }
-            Post.all(function (err, posts) {
-                test.equal(posts.length, 0);
-                Post.count(function (err, count) {
-                    test.equal(count, 0);
-                    test.done();
-                });
-            });
-        });
-    });
-
     it('should return type of property', function (test) {
         test.equal(Post.whatTypeName('title'), 'String');
         test.equal(Post.whatTypeName('content'), 'Text');
diff --git a/test/hooks.test.js b/test/hooks.test.js
index 5ded42ee..235b1fcd 100644
--- a/test/hooks.test.js
+++ b/test/hooks.test.js
@@ -8,15 +8,17 @@ var j = require('../'),
 
 describe('hooks', function() {
 
-    before(function() {
+    before(function(done) {
         db = getSchema();
 
         User = db.define('User', {
-            email: String,
+            email: {type: String, index: true},
             name: String,
             password: String,
             state: String
         });
+
+        db.automigrate(done);
     });
 
     describe('initialize', function() {
@@ -110,6 +112,26 @@ describe('hooks', function() {
                 user.save();
             });
         });
+
+        it('should save actual modifications to database', function(done) {
+            User.beforeSave = function(next, data) {
+                data.password = 'hash';
+                next();
+            };
+            User.destroyAll(function() {
+                User.create({
+                    email: 'james.bond@example.com',
+                    password: 'secret'
+                }, function() {
+                    User.findOne({
+                        where: {email: 'james.bond@example.com'}
+                    }, function(err, jb) {
+                        jb.password.should.equal('hash');
+                        done();
+                    });
+                });
+            });
+        });
     });
 
     describe('update', function() {
diff --git a/test/include.test.js b/test/include.test.js
new file mode 100644
index 00000000..f8a11b29
--- /dev/null
+++ b/test/include.test.js
@@ -0,0 +1,204 @@
+var db, User, Post, Passport, City, Street, Building, should = require('should');
+var nbSchemaRequests = 0;
+
+describe('include', function() {
+
+    before(setup);
+
+    it('should fetch belongsTo relation', function(done) {
+        Passport.all({include: 'owner'}, function (err, passports) {
+            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);
+                } else {
+                    p.__cachedRelations.owner.id.should.equal(p.ownerId);
+                }
+            });
+            done();
+        });
+    });
+
+    it('should fetch hasMany relation', function(done) {
+        User.all({include: 'posts'}, function (err, users) {
+            should.not.exist(err);
+            should.exist(users);
+            users.length.should.be.ok;
+            users.forEach(function(u) {
+                u.__cachedRelations.should.have.property('posts');
+                u.__cachedRelations.posts.forEach(function(p) {
+                    p.userId.should.equal(u.id);
+                });
+            });
+            done();
+        });
+    });
+
+    it('should fetch Passport - Owner - Posts', function(done) {
+        Passport.all({include: {owner: 'posts'}}, function(err, passports) {
+            should.not.exist(err);
+            should.exist(passports);
+            passports.length.should.be.ok;
+            passports.forEach(function(p) {
+                p.__cachedRelations.should.have.property('owner');
+                var user = p.__cachedRelations.owner;
+                if (p.ownerId === null) {
+                    should.not.exist(user);
+                } else {
+                    user.id.should.equal(p.ownerId);
+                    user.__cachedRelations.should.have.property('posts');
+                    user.__cachedRelations.posts.forEach(function(pp) {
+                        pp.userId.should.equal(user.id);
+                    });
+                }
+            });
+            done();
+        });
+    });
+
+    it('should fetch Passports - User - Posts - User', function(done) {
+        Passport.all({
+            include: {owner: {posts: 'author'}}
+        }, function(err, passports) {
+            should.not.exist(err);
+            should.exist(passports);
+            passports.length.should.be.ok;
+            passports.forEach(function(p) {
+                p.__cachedRelations.should.have.property('owner');
+                var user = p.__cachedRelations.owner;
+                if (p.ownerId === null) {
+                    should.not.exist(user);
+                } else {
+                    user.id.should.equal(p.ownerId);
+                    user.__cachedRelations.should.have.property('posts');
+                    user.__cachedRelations.posts.forEach(function(pp) {
+                        pp.userId.should.equal(user.id);
+                        pp.__cachedRelations.should.have.property('author');
+                        var author = pp.__cachedRelations.author;
+                        author.id.should.equal(user.id);
+                    });
+                }
+            });
+            done();
+        });
+    });
+
+    it('should fetch User - Posts AND Passports', function(done) {
+        User.all({include: ['posts', 'passports']}, function(err, users) {
+            should.not.exist(err);
+            should.exist(users);
+            users.length.should.be.ok;
+            users.forEach(function(user) {
+                user.__cachedRelations.should.have.property('posts');
+                user.__cachedRelations.should.have.property('passports');
+                user.__cachedRelations.posts.forEach(function(p) {
+                    p.userId.should.equal(user.id);
+                });
+                user.__cachedRelations.passports.forEach(function(pp) {
+                    pp.ownerId.should.equal(user.id);
+                });
+            });
+            done();
+        });
+    });
+
+});
+
+function setup(done) {
+    db = getSchema();
+    City = db.define('City');
+    Street = db.define('Street');
+    Building = db.define('Building');
+    User = db.define('User', {
+        name: String,
+        age: Number
+    });
+    Passport = db.define('Passport', {
+        number: String
+    });
+    Post = db.define('Post', {
+        title: String
+    });
+
+    Passport.belongsTo('owner', {model: User});
+    User.hasMany('passports', {foreignKey: 'ownerId'});
+    User.hasMany('posts', {foreignKey: 'userId'});
+    Post.belongsTo('author', {model: User, foreignKey: 'userId'});
+
+    db.automigrate(function() {
+        var createdUsers = [];
+        var createdPassports = [];
+        var createdPosts = [];
+        createUsers();
+        function createUsers() {
+            clearAndCreate(
+                User,
+                [
+                    {name: 'User A', age: 21},
+                    {name: 'User B', age: 22},
+                    {name: 'User C', age: 23},
+                    {name: 'User D', age: 24},
+                    {name: 'User E', age: 25}
+                ],
+                function(items) {
+                    createdUsers = items;
+                    createPassports();
+                }
+            );
+        }
+
+        function createPassports() {
+            clearAndCreate(
+                Passport,
+                [
+                    {number: '1', ownerId: createdUsers[0].id},
+                    {number: '2', ownerId: createdUsers[1].id},
+                    {number: '3'}
+                ],
+                function(items) {
+                    createdPassports = items;
+                    createPosts();
+                }
+            );
+        }
+
+        function createPosts() {
+            clearAndCreate(
+                Post,
+                [
+                    {title: 'Post A', userId: createdUsers[0].id},
+                    {title: 'Post B', userId: createdUsers[0].id},
+                    {title: 'Post C', userId: createdUsers[0].id},
+                    {title: 'Post D', userId: createdUsers[1].id},
+                    {title: 'Post E'}
+                ],
+                function(items) {
+                    createdPosts = items;
+                    done();
+                }
+            );
+        }
+
+    });
+}
+
+function clearAndCreate(model, data, callback) {
+    var createdItems = [];
+    model.destroyAll(function () {
+        nextItem(null, null);
+    });
+
+    var itemIndex = 0;
+    function nextItem(err, lastItem) {
+        if (lastItem !== null) {
+            createdItems.push(lastItem);
+        }
+        if (itemIndex >= data.length) {
+            callback(createdItems);
+            return;
+        }
+        model.create(data[itemIndex], nextItem);
+        itemIndex++;
+    }
+}
diff --git a/test/manipulation.test.js b/test/manipulation.test.js
new file mode 100644
index 00000000..490ab3d9
--- /dev/null
+++ b/test/manipulation.test.js
@@ -0,0 +1,137 @@
+var db, Person, should = require('should');
+
+describe('manipulation', function() {
+
+    before(function(done) {
+        db = getSchema();
+
+        Person = db.define('Person', {
+            name: String,
+            gender: String,
+            married: Boolean,
+            age: {type: Number, index: true},
+            dob: Date,
+            createdAt: {type: Number, default: Date.now}
+        });
+
+        db.automigrate(done);
+
+    });
+
+    describe('create', function() {
+
+        before(function(done) {
+            Person.destroyAll(done);
+        });
+
+        it('should create instance', function(done) {
+            Person.create({name: 'Anatoliy'}, function(err, p) {
+                p.name.should.equal('Anatoliy');
+                should.not.exist(err);
+                should.exist(p);
+                Person.find(p.id, function(err, person) {
+                    person.id.should.equal(p.id);
+                    person.name.should.equal('Anatoliy');
+                    done();
+                });
+            });
+        });
+
+        it('should work when called without callback', function(done) {
+            Person.afterCreate = function(next) {
+                this.should.be.an.instanceOf(Person);
+                this.name.should.equal('Nickolay');
+                should.exist(this.id);
+                Person.afterCreate = null;
+                next();
+                setTimeout(done, 10);
+            };
+            Person.create({name: 'Nickolay'});
+        });
+
+        it('should create instance with blank data', function(done) {
+            Person.create(function(err, p) {
+                should.not.exist(err);
+                should.exist(p);
+                should.not.exists(p.name);
+                Person.find(p.id, function(err, person) {
+                    person.id.should.equal(p.id);
+                    should.not.exists(person.name);
+                    done();
+                });
+            });
+        });
+
+        it('should work when called with no data and callback', function(done) {
+            Person.afterCreate = function(next) {
+                this.should.be.an.instanceOf(Person);
+                should.not.exist(this.name);
+                should.exist(this.id);
+                Person.afterCreate = null;
+                next();
+                setTimeout(done, 10);
+            };
+            Person.create();
+        });
+    });
+
+    describe('save', function() {
+        it('should save new object');
+        it('should save existing object');
+        it('should save invalid object (skipping validation)');
+        it('should save throw error on validation');
+    });
+
+    describe('destroy', function() {
+
+        it('should destroy record', function(done) {
+            Person.create(function(err, p){ 
+                p.destroy(function(err) {
+                    should.not.exist(err);
+                    Person.exists(p.id, function(err, ex) {
+                        ex.should.not.be.ok;
+                        done();
+                    });
+                });
+            });
+        });
+
+        it('should destroy all records', function (done) {
+            Person.destroyAll(function (err) {
+                should.not.exist(err);
+                Person.all(function (err, posts) {
+                    posts.should.have.lengthOf(0);
+                    Person.count(function (err, count) {
+                        count.should.eql(0);
+                        done();
+                    });
+                });
+            });
+        });
+
+        // TODO: implement destroy with filtered set
+        it('should destroy filtered set of records');
+    });
+
+    describe('initialize', function() {
+        it('should initialize object properly', function() {
+            var hw = 'Hello word',
+                now = Date.now(),
+                person = new Person({name: hw});
+
+            person.name.should.equal(hw);
+            person.propertyChanged('name').should.be.false;
+            person.name = 'Goodbye, Lenin';
+            person.name_was.should.equal(hw);
+            person.propertyChanged('name').should.be.true;
+            (person.createdAt >= now).should.be.true;
+            person.isNewRecord().should.be.true;
+        });
+
+        it('should work when constructor called as function', function() {
+            var p = Person({name: 'John Resig'});
+            p.should.be.an.instanceOf(Person);
+            p.name.should.equal('John Resig');
+        });
+    });
+});
diff --git a/test/relations.test.js b/test/relations.test.js
index ed10dae7..b41a606e 100644
--- a/test/relations.test.js
+++ b/test/relations.test.js
@@ -1,12 +1,22 @@
-var db, Book, Chapter, Author, Reader;
+var db, Book, Chapter, Author, Reader, should = require('should');
 
 describe('relations', function() {
-    before(function() {
+    before(function(done) {
         db = getSchema();
         Book = db.define('Book', {name: String});
-        Chapter = db.define('Chapter', {name: String});
+        Chapter = db.define('Chapter', {name: {type: String, index: true}});
         Author = db.define('Author', {name: String});
         Reader = db.define('Reader', {name: String});
+
+        db.automigrate(function() {
+            Book.destroyAll(function() {
+                Chapter.destroyAll(function() {
+                    Author.destroyAll(function() {
+                        Reader.destroyAll(done);
+                    });
+                });
+            });
+        });
     });
 
     after(function() {
@@ -14,7 +24,7 @@ describe('relations', function() {
     });
 
     describe('hasMany', function() {
-        it('can be declared in different ways', function() {
+        it('can be declared in different ways', function(done) {
             Book.hasMany(Chapter);
             Book.hasMany(Reader, {as: 'users'});
             Book.hasMany(Author, {foreignKey: 'projectId'});
@@ -24,17 +34,87 @@ describe('relations', function() {
             b.authors.should.be.an.instanceOf(Function);
             Object.keys((new Chapter).toObject()).should.include('bookId');
             Object.keys((new Author).toObject()).should.include('projectId');
+
+            db.automigrate(done);
         });
 
-        it('can be declared in short form', function() {
+        it('can be declared in short form', function(done) {
             Author.hasMany('readers');
             (new Author).readers.should.be.an.instanceOf(Function);
             Object.keys((new Reader).toObject()).should.include('authorId');
+
+            db.automigrate(done);
+        });
+
+        it('should build record on scope', function(done) {
+            Book.create(function(err, book) {
+                var c = book.chapters.build();
+                c.bookId.should.equal(book.id);
+                c.save(done);
+            });
+        });
+
+        it('should create record on scope', function(done) {
+            Book.create(function(err, book) {
+                book.chapters.create(function(err, c) {
+                    should.not.exist(err);
+                    should.exist(c);
+                    c.bookId.should.equal(book.id);
+                    done();
+                });
+            });
+        });
+
+        it('should fetch all scoped instances', function(done) {
+            Book.create(function(err, book) {
+                book.chapters.create({name: 'a'}, function() {
+                    book.chapters.create({name: 'z'}, function() {
+                        book.chapters.create({name: 'c'}, function() {
+                            fetch(book);
+                        });
+                    });
+                });
+            });
+
+            function fetch(book) {
+                book.chapters(function(err, ch) {
+                    should.not.exist(err);
+                    should.exist(ch);
+                    ch.should.have.lengthOf(3);
+
+                    book.chapters({order: 'name DESC'}, function(e, c) {
+                        should.not.exist(e);
+                        should.exist(c);
+                        c.shift().name.should.equal('z');
+                        c.pop().name.should.equal('a');
+                        done();
+                    });
+                });
+            }
         });
     });
 
     describe('belongsTo', function() {
-        it('can be declared in different ways');
+        var List, Item, Fear, Mind;
+
+        it('can be declared in different ways', function() {
+            List = db.define('List', {name: String});
+            Item = db.define('Item', {name: String});
+            Fear = db.define('Fear');
+            Mind = db.define('Mind');
+
+            // syntax 1 (old)
+            Item.belongsTo(List);
+            Object.keys((new Item).toObject()).should.include('listId');
+            (new Item).list.should.be.an.instanceOf(Function);
+
+            // syntax 2 (new)
+            Fear.belongsTo('mind');
+            Object.keys((new Fear).toObject()).should.include('mindId');
+            (new Fear).mind.should.be.an.instanceOf(Function);
+            // (new Fear).mind.build().should.be.an.instanceOf(Mind);
+        });
+
         it('can be declared in short form');
     });