diff --git a/addons/account/models/account_bank_statement.py b/addons/account/models/account_bank_statement.py
index a6a37853b38..e180269917b 100644
--- a/addons/account/models/account_bank_statement.py
+++ b/addons/account/models/account_bank_statement.py
@@ -175,9 +175,10 @@ class AccountBankStatement(models.Model):
         journal_type = self.env.context.get('journal_type', False)
         company_id = self.env.company.id
         if journal_type:
-            journals = self.env['account.journal'].search([('type', '=', journal_type), ('company_id', '=', company_id)])
-            if journals:
-                return journals[0]
+            return self.env['account.journal'].search([
+                ('type', '=', journal_type),
+                ('company_id', '=', company_id)
+            ], limit=1)
         return self.env['account.journal']
 
     @api.depends('balance_start', 'previous_statement_id')
diff --git a/addons/im_livechat/controllers/main.py b/addons/im_livechat/controllers/main.py
index a37a53d6b5e..3078ebefae2 100644
--- a/addons/im_livechat/controllers/main.py
+++ b/addons/im_livechat/controllers/main.py
@@ -56,11 +56,9 @@ class LivechatController(http.Controller):
         if available:
             # find the country from the request
             country_id = False
-            country_code = request.session.geoip and request.session.geoip.get('country_code') or False
+            country_code = request.session.geoip.get('country_code') if request.session.geoip else False
             if country_code:
-                country_ids = request.env['res.country'].sudo().search([('code', '=', country_code)])
-                if country_ids:
-                    country_id = country_ids[0].id
+                country_id = request.env['res.country'].sudo().search([('code', '=', country_code)], limit=1).id
             # extract url
             url = request.httprequest.headers.get('Referer')
             # find the first matching rule for the given country and url
@@ -111,14 +109,13 @@ class LivechatController(http.Controller):
                 'is_internal': False,
             }
             if not channel.rating_ids:
-                res_model_id = request.env['ir.model'].sudo().search([('model', '=', channel._name)], limit=1).id
                 values.update({
                     'res_id': channel.id,
-                    'res_model_id': res_model_id,
+                    'res_model_id': request.env['ir.model']._get_id('mail.channel'),
                 })
                 # find the partner (operator)
                 if channel.channel_partner_ids:
-                    values['rated_partner_id'] = channel.channel_partner_ids[0] and channel.channel_partner_ids[0].id or False
+                    values['rated_partner_id'] = channel.channel_partner_ids[0].id
                 # if logged in user, set its partner on rating
                 values['partner_id'] = request.env.user.partner_id.id if request.session.uid else False
                 # create the rating
diff --git a/addons/mass_mailing/wizard/mail_compose_message.py b/addons/mass_mailing/wizard/mail_compose_message.py
index 87b1b914806..788afa1319c 100644
--- a/addons/mass_mailing/wizard/mail_compose_message.py
+++ b/addons/mass_mailing/wizard/mail_compose_message.py
@@ -22,7 +22,7 @@ class MailComposeMessage(models.TransientModel):
         # use only for allowed models in mass mailing
         if self.composition_mode == 'mass_mail' and \
                 (self.mass_mailing_name or self.mass_mailing_id) and \
-                self.env['ir.model'].sudo().search([('model', '=', self.model), ('is_mail_thread', '=', True)], limit=1):
+                self.env['ir.model'].sudo().search_count([('model', '=', self.model), ('is_mail_thread', '=', True)]):
             mass_mailing = self.mass_mailing_id
             if not mass_mailing:
                 mass_mailing = self.env['mailing.mailing'].create({
diff --git a/addons/rating/models/mail_thread.py b/addons/rating/models/mail_thread.py
index e2182ea9cb5..8725bc81c44 100644
--- a/addons/rating/models/mail_thread.py
+++ b/addons/rating/models/mail_thread.py
@@ -16,11 +16,10 @@ class MailThread(models.AbstractModel):
         # create rating.rating record linked to given rating_value. Using sudo as portal users may have
         # rights to create messages and therefore ratings (security should be checked beforehand)
         if rating_value:
-            ir_model = self.env['ir.model'].sudo().search([('model', '=', self._name)])
             self.env['rating.rating'].sudo().create({
                 'rating': float(rating_value) if rating_value is not None else False,
                 'feedback': rating_feedback,
-                'res_model_id': ir_model.id,
+                'res_model_id': self.env['ir.model']._get_id(self._name),
                 'res_id': self.id,
                 'message_id': message.id,
                 'consumed': True,
diff --git a/addons/rating/models/rating_mixin.py b/addons/rating/models/rating_mixin.py
index 55c8e35f566..a2c799547a8 100644
--- a/addons/rating/models/rating_mixin.py
+++ b/addons/rating/models/rating_mixin.py
@@ -131,11 +131,10 @@ class RatingMixin(models.AbstractModel):
         rated_partner = self.rating_get_rated_partner_id()
         ratings = self.rating_ids.sudo().filtered(lambda x: x.partner_id.id == partner.id and not x.consumed)
         if not ratings:
-            record_model_id = self.env['ir.model'].sudo().search([('model', '=', self._name)], limit=1).id
             rating = self.env['rating.rating'].sudo().create({
                 'partner_id': partner.id,
                 'rated_partner_id': rated_partner.id,
-                'res_model_id': record_model_id,
+                'res_model_id': self.env['ir.model']._get_id(self._name),
                 'res_id': self.id,
                 'is_internal': False,
             })