diff --git a/src/Fields/BelongsTo.php b/src/Fields/BelongsTo.php
index 88983ebb3..c9952db31 100644
--- a/src/Fields/BelongsTo.php
+++ b/src/Fields/BelongsTo.php
@@ -3,6 +3,7 @@
 namespace Binaryk\LaravelRestify\Fields;
 
 use Binaryk\LaravelRestify\Http\Requests\RestifyRequest;
+use Binaryk\LaravelRestify\Repositories\Repository;
 use Closure;
 use Illuminate\Database\Eloquent\Model;
 
@@ -10,6 +11,18 @@ class BelongsTo extends EagerField
 {
     public ?Closure $storeParentCallback;
 
+    public function __construct($attribute, $relation, $parentRepository)
+    {
+        if (! is_a(app($parentRepository), Repository::class)) {
+            abort(500, "Invalid parent repository [{$parentRepository}]. Expended instance of ".Repository::class);
+        }
+
+        parent::__construct($attribute);
+
+        $this->relation = $relation;
+        $this->parentRepository = $parentRepository;
+    }
+
     public function storeParent(RestifyRequest $request, Model $child): self
     {
         if (is_callable($this->storeParentCallback)) {
@@ -23,7 +36,7 @@ public function storeParent(RestifyRequest $request, Model $child): self
 
         $child->{$this->attribute} = null;
 
-        $child->{$this->attribute} = $child->{$this->relationship}()->create(
+        $child->{$this->attribute} = $child->{$this->relation}()->create(
             $request->input($this->attribute)
         );
 
@@ -36,4 +49,13 @@ public function storeParentCallback(callable $callback)
 
         return $this;
     }
+
+    public function resolve($repository, $attribute = null)
+    {
+        $model = $repository->resource;
+
+        $this->value = $this->parentRepository::resolveWith(
+            $model->{$this->relation}()->first()
+        );
+    }
 }
diff --git a/src/Fields/BelongsToMany.php b/src/Fields/BelongsToMany.php
new file mode 100644
index 000000000..f25d78118
--- /dev/null
+++ b/src/Fields/BelongsToMany.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Binaryk\LaravelRestify\Fields;
+
+class BelongsToMany extends Field
+{
+    public function __construct($attribute, callable $resolveCallback = null, $repository = null)
+    {
+        parent::__construct($attribute, $resolveCallback);
+    }
+}
diff --git a/src/Fields/EagerField.php b/src/Fields/EagerField.php
new file mode 100644
index 000000000..9b46dc6b7
--- /dev/null
+++ b/src/Fields/EagerField.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Binaryk\LaravelRestify\Fields;
+
+class EagerField extends Field
+{
+    /**
+     * @var string
+     */
+    protected $relation;
+
+    /**
+     * @var string
+     */
+    protected $parentRepository;
+}
diff --git a/src/Fields/HasOne.php b/src/Fields/HasOne.php
new file mode 100644
index 000000000..504cd3926
--- /dev/null
+++ b/src/Fields/HasOne.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace Binaryk\LaravelRestify\Fields;
+
+use Binaryk\LaravelRestify\Http\Requests\RestifyRequest;
+use Binaryk\LaravelRestify\Models\CreationAware;
+use Binaryk\LaravelRestify\Repositories\Repository;
+use Illuminate\Database\Eloquent\Model;
+
+class HasOne extends EagerField
+{
+    public $storeParentCallback;
+
+    public function __construct($attribute, $relation, $parentRepository)
+    {
+        if (! is_a(app($parentRepository), Repository::class)) {
+            abort(500, "Invalid HasOne repository [{$parentRepository}]. Expended instance of ".Repository::class);
+        }
+
+        parent::__construct($attribute);
+
+        $this->relation = $relation;
+        $this->parentRepository = $parentRepository;
+    }
+
+    public function storeChild(RestifyRequest $request, Model $parent): self
+    {
+        if (is_callable($this->storeParentCallback)) {
+            call_user_func_array($this->storeParentCallback, [
+                $request,
+                $parent,
+            ]);
+
+            return $this;
+        }
+
+        $parent->{$this->attribute} = null;
+
+        $repository = $this->parentRepository::resolveWith(
+            $model = $parent->{$this->relation}()->getModel()
+        )->allowToStore($request, $request->input($this->attribute));
+
+        $model = new $model;
+
+        if ($model instanceof CreationAware) {
+            $model::createWithAttributes($request->input($this->attribute));
+
+            return $this;
+        }
+
+        $parent->{$this->attribute} = $repository::resolveWith(
+            $model->create($request->input($this->attribute))
+        );
+
+        return $this;
+    }
+
+    public function storeParentCallback(callable $callback)
+    {
+        $this->storeParentCallback = $callback;
+
+        return $this;
+    }
+
+    public function resolve($repository, $attribute = null)
+    {
+        $model = $repository->resource;
+
+        $this->value = $this->parentRepository::resolveWith(
+            $model->{$this->relation}()->first()
+        );
+    }
+}
diff --git a/src/Repositories/Repository.php b/src/Repositories/Repository.php
index 2a3ae52c5..6664b2ef2 100644
--- a/src/Repositories/Repository.php
+++ b/src/Repositories/Repository.php
@@ -5,8 +5,10 @@
 use Binaryk\LaravelRestify\Contracts\RestifySearchable;
 use Binaryk\LaravelRestify\Controllers\RestResponse;
 use Binaryk\LaravelRestify\Exceptions\InstanceOfException;
+use Binaryk\LaravelRestify\Fields\EagerField;
 use Binaryk\LaravelRestify\Fields\Field;
 use Binaryk\LaravelRestify\Fields\FieldCollection;
+use Binaryk\LaravelRestify\Fields\HasOne;
 use Binaryk\LaravelRestify\Filter;
 use Binaryk\LaravelRestify\Http\Requests\RepositoryStoreBulkRequest;
 use Binaryk\LaravelRestify\Http\Requests\RestifyRequest;
@@ -319,10 +321,19 @@ private function updateBulkFields(RestifyRequest $request)
     private function storeFields(RestifyRequest $request)
     {
         return $this->collectFields($request)
+            ->filter(fn (Field $field) => ! $field instanceof EagerField)
             ->forStore($request, $this)
             ->authorizedStore($request);
     }
 
+    private function hasOneFields(RestifyRequest $request)
+    {
+        return $this->collectFields($request)
+            ->forStore($request, $this)
+            ->filter(fn (Field $field) => $field instanceof HasOne)
+            ->authorizedStore($request);
+    }
+
     private function storeBulkFields(RestifyRequest $request)
     {
         return $this->collectFields($request)
@@ -641,6 +652,9 @@ public function store(RestifyRequest $request)
                 }
             }
 
+            $this->hasOneFields($request)
+                ->each(fn (HasOne $field) => $field->storeChild($request, $this->resource));
+
             $this->storeFields($request)->each(fn (Field $field) => $field->invokeAfter($request, $this->resource));
         });
 
diff --git a/tests/Fixtures/User/User.php b/tests/Fixtures/User/User.php
index acb2e642b..eef8d485f 100644
--- a/tests/Fixtures/User/User.php
+++ b/tests/Fixtures/User/User.php
@@ -82,6 +82,11 @@ public function posts()
         return $this->hasMany(Post::class);
     }
 
+    public function post()
+    {
+        return $this->hasOne(Post::class);
+    }
+
     public function companies()
     {
         return $this->belongsToMany(Company::class, 'company_user', 'user_id', 'company_id')->withPivot([
diff --git a/tests/Unit/BelongsToFieldTest.php b/tests/Unit/BelongsToFieldTest.php
new file mode 100644
index 000000000..2dc81d9d8
--- /dev/null
+++ b/tests/Unit/BelongsToFieldTest.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace Binaryk\LaravelRestify\Tests\Unit;
+
+use Binaryk\LaravelRestify\Fields\BelongsTo;
+use Binaryk\LaravelRestify\Fields\Field;
+use Binaryk\LaravelRestify\Http\Requests\RestifyRequest;
+use Binaryk\LaravelRestify\Repositories\Repository;
+use Binaryk\LaravelRestify\Restify;
+use Binaryk\LaravelRestify\Tests\Fixtures\Post\Post;
+use Binaryk\LaravelRestify\Tests\Fixtures\User\User;
+use Binaryk\LaravelRestify\Tests\Fixtures\User\UserRepository;
+use Binaryk\LaravelRestify\Tests\IntegrationTest;
+
+class BelongsToFieldTest extends IntegrationTest
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+        Restify::repositories([
+            PostWithUserRepository::class,
+        ]);
+    }
+
+    public function test_field_will_be_returned_in_relations()
+    {
+        factory(Post::class)->create([
+            'user_id' => factory(User::class),
+        ]);
+
+        $this->getJson('/restify-api/'.PostWithUserRepository::uriKey())
+            ->assertJsonStructure([
+                'data' => [
+                    [
+                        'attributes' => [
+                            'user' => [
+                                'attributes',
+                            ],
+                        ],
+                    ],
+                ],
+            ]);
+    }
+
+    public function test_belongs_to_field_is_ignored_when_storing()
+    {
+        factory(Post::class)->create([
+            'user_id' => factory(User::class),
+        ]);
+
+        $this->postJson('/restify-api/'.PostWithUserRepository::uriKey(), [
+            'title' => 'New Post with user',
+            'user' => [
+                'name' => 'Eduard Lupacescu',
+                'email' => 'eduard.lupacescu@binarcode.com',
+            ],
+        ])
+            ->assertCreated();
+    }
+}
+
+class PostWithUserRepository extends Repository
+{
+    public static $model = Post::class;
+
+    public function fields(RestifyRequest $request)
+    {
+        return [
+            Field::make('title'),
+
+            BelongsTo::make('user', 'user', UserRepository::class),
+        ];
+    }
+
+    public static function uriKey()
+    {
+        return 'posts-with-user-repository';
+    }
+}
diff --git a/tests/Unit/HasOneFieldTest.php b/tests/Unit/HasOneFieldTest.php
new file mode 100644
index 000000000..abede4bad
--- /dev/null
+++ b/tests/Unit/HasOneFieldTest.php
@@ -0,0 +1,99 @@
+<?php
+
+namespace Binaryk\LaravelRestify\Tests\Unit;
+
+use Binaryk\LaravelRestify\Fields\Field;
+use Binaryk\LaravelRestify\Fields\HasOne;
+use Binaryk\LaravelRestify\Http\Requests\RestifyRequest;
+use Binaryk\LaravelRestify\Repositories\Repository;
+use Binaryk\LaravelRestify\Restify;
+use Binaryk\LaravelRestify\Tests\Fixtures\Post\Post;
+use Binaryk\LaravelRestify\Tests\Fixtures\User\User;
+use Binaryk\LaravelRestify\Tests\IntegrationTest;
+
+class HasOneFieldTest extends IntegrationTest
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+        Restify::repositories([
+            UserWithPostRepository::class,
+        ]);
+    }
+
+    public function test_has_one_will_be_returned_in_relations()
+    {
+        $user = factory(User::class)->create();
+        factory(Post::class)->create([
+            'user_id' => $user->id,
+        ]);
+
+        $this->getJson('/restify-api/'.UserWithPostRepository::uriKey())
+        ->assertJsonStructure([
+            'data' => [
+                [
+                    'attributes' => [
+                        'name',
+                        'post',
+                    ],
+                ],
+            ],
+        ]);
+    }
+
+    public function test_has_one_field_is_saved_when_storing()
+    {
+        factory(Post::class)->create([
+            'user_id' => factory(User::class),
+        ]);
+
+        $this->postJson('/restify-api/'.UserWithPostRepository::uriKey(), [
+            'name' => 'Eduard Lupacescu',
+            'email' => 'eduard.lupacescu@binarcode.com',
+            'password' => 'secret!',
+            'post' => [
+                'title' => 'New Post with user',
+                'description' => 'New Post description',
+            ],
+        ])
+            ->dump()
+            ->assertCreated();
+    }
+}
+
+class UserWithPostRepository extends Repository
+{
+    public static $model = User::class;
+
+    public function fields(RestifyRequest $request)
+    {
+        return [
+            Field::new('name'),
+            Field::new('email'),
+            Field::new('password'),
+
+            HasOne::make('post', 'post', PostRepository::class),
+        ];
+    }
+
+    public static function uriKey()
+    {
+        return 'user-with-post-repository';
+    }
+}
+
+class PostRepository extends Repository
+{
+    public static $model = Post::class;
+
+    public function fields(RestifyRequest $request)
+    {
+        return [
+            Field::new('title')->storingRules('required')->messages([
+                'required' => 'This field is required',
+            ]),
+
+            Field::new('description')->storingRules('required'),
+        ];
+    }
+}