diff --git a/hotel_management_odoo/__manifest__.py b/hotel_management_odoo/__manifest__.py
index afdad24b3..d97ee8460 100644
--- a/hotel_management_odoo/__manifest__.py
+++ b/hotel_management_odoo/__manifest__.py
@@ -22,7 +22,7 @@
 
 {
     'name': 'Hotel Management',
-    'version': '15.0.1.0.1',
+    'version': '15.0.1.0.2',
     'summary': 'Hotel Management Application for odoo 15',
     'description': """The module helps you to manage rooms,amenities,services,restaurants.
                       End Users can book rooms and reserve foods from hotel restaurant.""",
diff --git a/hotel_management_odoo/doc/RELEASE_NOTES.md b/hotel_management_odoo/doc/RELEASE_NOTES.md
index 6f22e386b..f89d7a58d 100644
--- a/hotel_management_odoo/doc/RELEASE_NOTES.md
+++ b/hotel_management_odoo/doc/RELEASE_NOTES.md
@@ -9,3 +9,8 @@
 #### Version 15.0.1.0.1
 #### UPDT
 - room reservation-number of persons validation issue
+
+#### 31.10.2022
+#### Version 15.0.1.0.2
+#### UPDT
+- multiple room checkin & checkout
diff --git a/hotel_management_odoo/models/hotel_amenity.py b/hotel_management_odoo/models/hotel_amenity.py
index 1180375c3..cf0f8bc7e 100644
--- a/hotel_management_odoo/models/hotel_amenity.py
+++ b/hotel_management_odoo/models/hotel_amenity.py
@@ -40,6 +40,17 @@ class AmenityTypes(models.Model):
         rec.unlink()
         return super(AmenityTypes, self).unlink()
 
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(AmenityTypes, self).copy(default=default)
+
 
 class HotelAmenity(models.Model):
     _name = "hotel.amenity"
@@ -66,3 +77,14 @@ class HotelAmenity(models.Model):
         rec = self.env["product.product"].sudo().browse(self.product_id.id)
         rec.unlink()
         return super(HotelAmenity, self).unlink()
+
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(HotelAmenity, self).copy(default=default)
\ No newline at end of file
diff --git a/hotel_management_odoo/models/hotel_meals.py b/hotel_management_odoo/models/hotel_meals.py
index 895129638..b8c1d021f 100644
--- a/hotel_management_odoo/models/hotel_meals.py
+++ b/hotel_management_odoo/models/hotel_meals.py
@@ -48,3 +48,14 @@ class HotelMeals(models.Model):
         rec = self.env["product.product"].sudo().browse(self.product_id.id)
         rec.unlink()
         return super(HotelMeals, self).unlink()
+
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(HotelMeals, self).copy(default=default)
\ No newline at end of file
diff --git a/hotel_management_odoo/models/hotel_restaurant.py b/hotel_management_odoo/models/hotel_restaurant.py
index 8e322f275..51e60e275 100644
--- a/hotel_management_odoo/models/hotel_restaurant.py
+++ b/hotel_management_odoo/models/hotel_restaurant.py
@@ -47,4 +47,13 @@ class MealsTypes(models.Model):
         rec.unlink()
         return super(MealsTypes, self).unlink()
 
-
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(MealsTypes, self).copy(default=default)
\ No newline at end of file
diff --git a/hotel_management_odoo/models/hotel_services.py b/hotel_management_odoo/models/hotel_services.py
index aec0bf66f..e05453e19 100644
--- a/hotel_management_odoo/models/hotel_services.py
+++ b/hotel_management_odoo/models/hotel_services.py
@@ -41,6 +41,17 @@ class ServiceCategories(models.Model):
         rec.unlink()
         return super(ServiceCategories, self).unlink()
 
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(ServiceCategories, self).copy(default=default)
+
 
 class HotelService(models.Model):
     _name = "hotel.service"
@@ -67,3 +78,14 @@ class HotelService(models.Model):
         rec = self.env["product.product"].sudo().browse(self.product_id.id)
         rec.unlink()
         return super(HotelService, self).unlink()
+
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(HotelService, self).copy(default=default)
\ No newline at end of file
diff --git a/hotel_management_odoo/models/res_settings.py b/hotel_management_odoo/models/res_settings.py
index c97bbbff0..034c843a9 100644
--- a/hotel_management_odoo/models/res_settings.py
+++ b/hotel_management_odoo/models/res_settings.py
@@ -19,7 +19,7 @@
 #    If not, see <http://www.gnu.org/licenses/>.
 #
 #############################################################################
-from odoo import fields, models, api
+from odoo import fields, models, api, _
 
 
 class ProductProduct(models.Model):
@@ -69,6 +69,17 @@ class Rooms(models.Model):
         rec.unlink()
         return super(Rooms, self).unlink()
 
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(Rooms, self).copy(default=default)
+
 
 class RoomTypes(models.Model):
     _name = "room.types"
@@ -94,9 +105,33 @@ class RoomTypes(models.Model):
         rec.unlink()
         return super(RoomTypes, self).unlink()
 
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(RoomTypes, self).copy(default=default)
+
 
 class Floor(models.Model):
     _name = "hotel.floor"
     _description = "Floor"
 
     name = fields.Char(string="Name", required=True)
+
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        """For adding '(copy)' string into name while duplicating a record"""
+
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if 'name' not in default:
+            default['name'] = _("%s (copy)", self.name)
+        return super(Floor, self).copy(default=default)
+
+
diff --git a/hotel_management_odoo/models/room_check_in_out.py b/hotel_management_odoo/models/room_check_in_out.py
index 50e71498c..d292e192f 100644
--- a/hotel_management_odoo/models/room_check_in_out.py
+++ b/hotel_management_odoo/models/room_check_in_out.py
@@ -28,16 +28,37 @@ class RoomCheckin(models.Model):
 
     name = fields.Char(string='Check-In Reference', required=True, copy=False, readonly=True,
                        default=lambda self: _('New'))
-    rm_id = fields.Many2one('room.reservation.line', domain="[('reservation_id','=',reservation_id)]", string="Room No",required=True)
-    reservation_id = fields.Many2one('room.reservation', string='Reservation ',required=True,
+    rm_ids = fields.Many2many('room.reservation.line',
+                              domain="[('reservation_id','=',reservation_id)]",
+                              string="Room No",
+                              required=True)
+    reservation_id = fields.Many2one('room.reservation', string='Reservation ', required=True,
                                      domain="[('state','=','confirm')]")
-    state = fields.Selection([('draft', 'Draft'),('done', 'Done')],
+    state = fields.Selection([('draft', 'Draft'), ('done', 'Done')],
                              default='draft')
 
+    @api.onchange('reservation_id')
+    def _rm_ids(self):
+        res_line = []
+        if self.reservation_id.reservation_line_ids:
+            for line in self.reservation_id.reservation_line_ids:
+                if line.room_id.status == 'book':
+                    res_line.append(line.id)
+        return {'domain': {'rm_ids': [('id', 'in', res_line)]}}
+
     def action_checkin(self):
-        self.rm_id.room_id.write({'status': 'occupied'})
-        self.reservation_id.write({'state': 'occupied'})
-        self.state='done'
+        for rec in self.rm_ids: rec.room_id.write({'status': 'occupied'})
+        state = self.reservation_id.reservation_line_ids.mapped('room_id')
+        rs_flag = True
+        for rec in state:
+            if rec.status == 'occupied':
+                rs_flag = True
+            else:
+                rs_flag = False
+                break
+        if rs_flag:
+            self.reservation_id.write({'state': 'occupied'})
+        self.state = 'done'
 
     @api.model
     def create(self, vals):
@@ -51,26 +72,40 @@ class RoomCheckout(models.Model):
     _name = "room.checkout"
     _description = 'Room Checkout'
 
-    name = fields.Char(string='Check-Out Reference',required=True, copy=False, readonly=True,
+    name = fields.Char(string='Check-Out Reference', required=True, copy=False, readonly=True,
                        default=lambda self: _('New'))
-    rm_id = fields.Many2one('room.reservation.line', domain="[('reservation_id','=',reservation_id)]", string="Room No",required=True)
-    reservation_id = fields.Many2one('room.reservation', string='Reservation', domain="[('state','=','occupied')]",required=True)
+    rm_ids = fields.Many2many('room.reservation.line', domain="[('reservation_id','=',reservation_id)]",
+                              string="Room No",
+                              required=True)
+    reservation_id = fields.Many2one('room.reservation', string='Reservation', domain="[('state','=','occupied')]",
+                                     required=True)
     state = fields.Selection([('draft', 'Draft'), ('done', 'Done')],
                              default='draft')
 
+    @api.onchange('reservation_id')
+    def _rm_ids(self):
+        res_line = []
+        if self.reservation_id.reservation_line_ids:
+            for line in self.reservation_id.reservation_line_ids:
+                if line.room_id.status == 'occupied':
+                    res_line.append(line.id)
+        return {'domain': {'rm_ids': [('id', 'in', res_line)]}}
+
     def action_checkout(self):
-        self.rm_id.room_id.write({'status': 'available'})
-        reserv_line = self.env['room.reservation.line'].sudo().search([('reservation_id', '=', self.reservation_id.id)])
-        status = 'available'
-        for rec in reserv_line:
-            if rec.room_id.status == 'available':
-                break
+        for rec in self.rm_ids: rec.room_id.write({'status': 'available'})
+        state = self.reservation_id.reservation_line_ids.mapped('room_id')
+        rs_flag = True
+        for rec in state:
+            if rec.status == 'available':
+                rs_flag = True
             else:
-                status = 'occupied'
-        if status == 'available':
+                rs_flag = False
+                break
+        if rs_flag:
             self.reservation_id.write({'state': 'done'})
         self.state = 'done'
 
+
     @api.model
     def create(self, vals):
         if vals.get('name', _('New')) == _('New'):
diff --git a/hotel_management_odoo/views/room_checkin_in_out.xml b/hotel_management_odoo/views/room_checkin_in_out.xml
index f0471e451..d8c84a108 100644
--- a/hotel_management_odoo/views/room_checkin_in_out.xml
+++ b/hotel_management_odoo/views/room_checkin_in_out.xml
@@ -42,7 +42,7 @@
                     <group>
                         <group>
                             <field name="reservation_id"/>
-                            <field name="rm_id"/>
+                            <field name="rm_ids" widget="many2many_tags"/>
                         </group>
                     </group>
                 </sheet>
@@ -90,7 +90,7 @@
                     <group>
                         <group>
                             <field name="reservation_id"/>
-                            <field name="rm_id"/>
+                            <field name="rm_ids" widget="many2many_tags"/>
                         </group>
                     </group>
                 </sheet>