From 0452d0701fcb8f4588b9b05dad9bbdd507539265 Mon Sep 17 00:00:00 2001
From: Gorash <chm@odoo.com>
Date: Tue, 19 Apr 2022 10:27:38 +0000
Subject: [PATCH] [IMP] website: remove cache from website.page

The cache placed on the pages is no longer useful thanks to the use of
the new directive t-cache.

closes odoo/odoo#88276

Related: odoo/enterprise#27582
Related: odoo/documentation#2056
Related: odoo/upgrade#3451
Signed-off-by: Vincent Schippefilt (vsc) <vsc@odoo.com>
---
 addons/portal/views/portal_templates.xml      |  2 +-
 .../test_event_full/tests/test_performance.py |  2 +-
 addons/web/models/ir_http.py                  |  2 +-
 addons/website/data/website_data.xml          |  1 -
 addons/website/models/ir_http.py              | 36 -------------------
 addons/website/models/ir_ui_view.py           |  8 -----
 addons/website/models/website.py              |  5 ---
 addons/website/models/website_menu.py         |  6 ++--
 addons/website/models/website_page.py         | 33 -----------------
 addons/website/tests/test_performance.py      | 27 ++++++++------
 addons/website/views/website_templates.xml    |  6 +++-
 addons/website/views/website_views.xml        |  2 --
 addons/website_blog/tests/test_performance.py | 14 ++++----
 addons/website_payment/models/__init__.py     |  1 -
 addons/website_payment/models/website_page.py | 15 --------
 addons/website_sale/controllers/main.py       |  8 ++---
 addons/website_sale/models/__init__.py        |  1 -
 addons/website_sale/models/website.py         |  5 +--
 addons/website_sale/models/website_page.py    | 14 --------
 odoo/addons/base/models/res_lang.py           |  4 +++
 20 files changed, 45 insertions(+), 147 deletions(-)
 delete mode 100644 addons/website_payment/models/website_page.py
 delete mode 100644 addons/website_sale/models/website_page.py

diff --git a/addons/portal/views/portal_templates.xml b/addons/portal/views/portal_templates.xml
index 24ca6ad2b50..683eae2654e 100644
--- a/addons/portal/views/portal_templates.xml
+++ b/addons/portal/views/portal_templates.xml
@@ -2,7 +2,7 @@
 <odoo>
     <template id="frontend_layout" name="Main Frontend Layout" inherit_id="web.frontend_layout">
         <xpath expr="//div[@id='wrapwrap']" position="attributes">
-            <attribute name="t-attf-class" add="#{request.env['res.lang']._lang_get(request.env.lang).direction == 'rtl' and 'o_rtl' or ''}" separator=" "/>
+            <attribute name="t-attf-class" add="#{request.env['res.lang']._lang_get_direction(request.env.lang) == 'rtl' and 'o_rtl' or ''}" separator=" "/>
             <attribute name="t-attf-class" add="#{'o_portal' if is_portal else ''}" separator=" "/>
         </xpath>
         <xpath expr="//div[@id='wrapwrap']/header/img" position="replace">
diff --git a/addons/test_event_full/tests/test_performance.py b/addons/test_event_full/tests/test_performance.py
index 91dc5080b54..c70bbf17c13 100644
--- a/addons/test_event_full/tests/test_performance.py
+++ b/addons/test_event_full/tests/test_performance.py
@@ -420,7 +420,7 @@ class TestOnlineEventPerformance(EventPerformanceCase, UtilPerf):
         ])
 
     def _test_url_open(self, url):
-        url += ('?' not in url and '?' or '') + '&nocache'
+        url += ('?' not in url and '?' or '') + '&debug=disable-t-cache'
         return self.url_open(url)
 
     @warmup
diff --git a/addons/web/models/ir_http.py b/addons/web/models/ir_http.py
index d440997f6b3..027e956e6b0 100644
--- a/addons/web/models/ir_http.py
+++ b/addons/web/models/ir_http.py
@@ -28,7 +28,7 @@ You can use any truthy/falsy value from `str2bool` (eg: 'on', 'f'..)
 Multiple debug modes can be activated simultaneously, separated with a
 comma (eg: 'tests, assets').
 """
-ALLOWED_DEBUG_MODES = ['', '1', 'assets', 'tests']
+ALLOWED_DEBUG_MODES = ['', '1', 'assets', 'tests', 'disable-t-cache']
 
 
 class Http(models.AbstractModel):
diff --git a/addons/website/data/website_data.xml b/addons/website/data/website_data.xml
index 23ce296082a..8303fa31477 100644
--- a/addons/website/data/website_data.xml
+++ b/addons/website/data/website_data.xml
@@ -523,7 +523,6 @@
             <field name="url">/contactus</field>
             <field name="is_published">True</field>
             <field name="view_id" ref="contactus"/>
-            <field name="cache_time">0</field>
             <field name="track">True</field>
         </record>
 
diff --git a/addons/website/models/ir_http.py b/addons/website/models/ir_http.py
index ca590174688..61677ff338d 100644
--- a/addons/website/models/ir_http.py
+++ b/addons/website/models/ir_http.py
@@ -267,48 +267,12 @@ class Http(models.AbstractModel):
                 path += '?' + request.httprequest.query_string.decode('utf-8')
             return request.redirect(path, code=301)
 
-        if page:
-            # prefetch all menus (it will prefetch website.page too)
-            menu_pages_ids = request.website._get_menu_page_ids()
-            page.browse([page.id] + menu_pages_ids).mapped('view_id.name')
-            request.website.menu_id
-
         if page and (request.website.is_publisher() or page.is_visible):
-            need_to_cache = False
-            cache_key = page._get_cache_key(request)
-            if (
-                page.cache_time  # cache > 0
-                and request.httprequest.method == "GET"
-                and request.env.user._is_public()    # only cache for unlogged user
-                and 'nocache' not in request.httprequest.args  # allow bypass cache / debug
-                and not request.session.debug
-                and len(cache_key) and cache_key[-1] is not None  # nocache via expr
-            ):
-                need_to_cache = True
-                try:
-                    r = page._get_cache_response(cache_key)
-                    if r['time'] + page.cache_time > time.time():
-                        response = odoo.http.Response(r['content'], mimetype=r['contenttype'])
-                        response._cached_template = r['template']
-                        response._cached_page = page
-                        return response
-                except KeyError:
-                    pass
-
             _, ext = os.path.splitext(req_page)
             response = request.render(page.view_id.id, {
                 'deletable': True,
                 'main_object': page,
             }, mimetype=_guess_mimetype(ext))
-
-            if need_to_cache and response.status_code == 200:
-                r = response.render()
-                page._set_cache_response(cache_key, {
-                    'content': r,
-                    'contenttype': response.headers['Content-Type'],
-                    'time': time.time(),
-                    'template': getattr(response, 'qcontext', {}).get('response_template')
-                })
             return response
         return False
 
diff --git a/addons/website/models/ir_ui_view.py b/addons/website/models/ir_ui_view.py
index 49f159dab8f..5463e6651a6 100644
--- a/addons/website/models/ir_ui_view.py
+++ b/addons/website/models/ir_ui_view.py
@@ -105,14 +105,6 @@ class View(models.Model):
 
             pages = view.page_ids
 
-            # Disable cache of page if we guess some dynamic content (form with csrf, ...)
-            if vals.get('arch'):
-                to_invalidate = pages.filtered(
-                    lambda p: p.cache_time and not p._can_be_cached(vals['arch'])
-                )
-                to_invalidate and _logger.info('Disable cache for page %s', to_invalidate)
-                to_invalidate.cache_time = 0
-
             # No need of COW if the view is already specific
             if view.website_id:
                 super(View, view).write(vals)
diff --git a/addons/website/models/website.py b/addons/website/models/website.py
index 10a3ec6615d..8b01d038805 100644
--- a/addons/website/models/website.py
+++ b/addons/website/models/website.py
@@ -176,11 +176,6 @@ class Website(models.Model):
     def _get_menu_ids(self):
         return self.env['website.menu'].search([('website_id', '=', self.id)]).ids
 
-    # self.env.uid for ir.rule groups on menu
-    @tools.ormcache('self.env.uid', 'self.id')
-    def _get_menu_page_ids(self):
-        return self.env['website.menu'].search([('website_id', '=', self.id)]).page_id.ids
-
     @api.model_create_multi
     def create(self, vals_list):
         for vals in vals_list:
diff --git a/addons/website/models/website_menu.py b/addons/website/models/website_menu.py
index 735654aca1b..c981c63d3f2 100644
--- a/addons/website/models/website_menu.py
+++ b/addons/website/models/website_menu.py
@@ -98,10 +98,8 @@ class Menu(models.Model):
         return menus
 
     def write(self, values):
-        res = super().write(values)
-        if 'website_id' in values or 'sequence' in values or 'page_id' in values:
-            self.clear_caches()
-        return res
+        self.clear_caches()
+        return super().write(values)
 
     def unlink(self):
         self.clear_caches()
diff --git a/addons/website/models/website_page.py b/addons/website/models/website_page.py
index c05d111042e..539022dfca7 100644
--- a/addons/website/models/website_page.py
+++ b/addons/website/models/website_page.py
@@ -31,9 +31,6 @@ class Page(models.Model):
     is_homepage = fields.Boolean(compute='_compute_homepage', inverse='_set_homepage', string='Homepage')
     is_visible = fields.Boolean(compute='_compute_visible', string='Is Visible')
 
-    cache_time = fields.Integer(default=3600, help='Time to cache the page. (0 = no cache)')
-    cache_key_expr = fields.Char(help='Expression (tuple) to evaluate the cached key. \nE.g.: "(request.params.get("currency"), )"')
-
     # Page options
     header_overlay = fields.Boolean()
     header_color = fields.Char()
@@ -221,36 +218,6 @@ class Page(models.Model):
         self.ensure_one()
         return self.view_id.get_website_meta()
 
-    @api.model
-    def _get_cached_blacklist(self):
-        return ('data-snippet="s_website_form"', 'data-no-page-cache=', )
-
-    def _can_be_cached(self, response):
-        """ return False if at least one blacklisted's word is present in content """
-        blacklist = self._get_cached_blacklist()
-        return not any(black in str(response) for black in blacklist)
-
-    def _get_cache_key(self, req):
-        # Always call me with super() AT THE END to have cache_key_expr appended as last element
-        # It is the only way for end user to not use cache via expr.
-        # E.g  (None if 'token' in request.params else 1,)  will bypass cache_time
-        cache_key = (req.website.id, req.lang, req.httprequest.path)
-        if self.cache_key_expr:  # e.g. (request.geoip.get('country_code'),)
-            cache_key += safe_eval(self.cache_key_expr, {'request': req})
-        return cache_key
-
-    def _get_cache_response(self, cache_key):
-        """ Return the cached response corresponding to ``self`` and ``cache_key``.
-        Raise a KeyError if the item is not in cache.
-        """
-        # HACK: we use the same LRU as ormcache to take advantage from its
-        # distributed invalidation, but we don't explicitly use ormcache
-        return self.pool._Registry__cache[('website.page', _cached_response, self.id, cache_key)]
-
-    def _set_cache_response(self, cache_key, response):
-        """ Put in cache the given response. """
-        self.pool._Registry__cache[('website.page', _cached_response, self.id, cache_key)] = response
-
     @api.model
     def _search_get_detail(self, website, order, options):
         with_description = options['displayDescription']
diff --git a/addons/website/tests/test_performance.py b/addons/website/tests/test_performance.py
index 5473ea09acf..f960ea66da1 100644
--- a/addons/website/tests/test_performance.py
+++ b/addons/website/tests/test_performance.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
+from odoo.tools import mute_logger
 from odoo.tests.common import HttpCase
 
 EXTRA_REQUEST = 2 - 1
@@ -18,8 +19,10 @@ be added:
 class UtilPerf(HttpCase):
     def _get_url_hot_query(self, url, cache=True):
         url += ('?' not in url and '?' or '')
-        if not cache:
-            url += '&nocache'
+        if cache:
+            url += '&debug='
+        else:
+            url += '&debug=disable-t-cache'
 
         # ensure worker is in hot state
         self.url_open(url)
@@ -31,6 +34,7 @@ class UtilPerf(HttpCase):
 
 
 class TestStandardPerformance(UtilPerf):
+    @mute_logger('odoo.http')
     def test_10_perf_sql_img_controller(self):
         self.authenticate('demo', 'demo')
         # not published user, get the not found image placeholder
@@ -39,6 +43,7 @@ class TestStandardPerformance(UtilPerf):
         self.assertEqual(self._get_url_hot_query(url), 6)
         self.assertEqual(self._get_url_hot_query(url, cache=False), 6)
 
+    @mute_logger('odoo.http')
     def test_11_perf_sql_img_controller(self):
         self.authenticate('demo', 'demo')
         self.env['res.users'].sudo().browse(2).website_published = True
@@ -46,6 +51,7 @@ class TestStandardPerformance(UtilPerf):
         self.assertEqual(self._get_url_hot_query(url), 6)
         self.assertEqual(self._get_url_hot_query(url, cache=False), 6)
 
+    @mute_logger('odoo.http')
     def test_20_perf_sql_img_controller_bis(self):
         url = '/web/image/website/1/favicon'
         self.assertEqual(self._get_url_hot_query(url), 5)
@@ -90,30 +96,30 @@ class TestWebsitePerformance(UtilPerf):
     def test_10_perf_sql_queries_page(self):
         # standard untracked website.page
         self.assertEqual(self._get_url_hot_query(self.page.url), 6)
-        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 11)
+        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 10)
         self.menu.unlink()
         self.assertEqual(self._get_url_hot_query(self.page.url), 6)
-        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 11)
+        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 10)
 
     def test_15_perf_sql_queries_page(self):
         # standard tracked website.page
         self.page.track = True
         self.assertEqual(self._get_url_hot_query(self.page.url), 14)
-        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 19)
+        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 18)
         self.menu.unlink()
         self.assertEqual(self._get_url_hot_query(self.page.url), 14)
-        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 19)
+        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 18)
 
     def test_20_perf_sql_queries_homepage(self):
         # homepage "/" has its own controller
         self.assertEqual(self._get_url_hot_query('/'), 14)
-        self.assertEqual(self._get_url_hot_query('/', cache=False), 18)
+        self.assertEqual(self._get_url_hot_query('/', cache=False), 16)
 
     def test_30_perf_sql_queries_page_no_layout(self):
         # website.page with no call to layout templates
         self.page.arch = '<div>I am a blank page</div>'
-        self.assertEqual(self._get_url_hot_query(self.page.url), 6)
-        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 7)
+        self.assertEqual(self._get_url_hot_query(self.page.url), 5)
+        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 5)
 
     def test_40_perf_sql_queries_page_multi_level_menu(self):
         # menu structure should not impact SQL requests
@@ -132,8 +138,9 @@ class TestWebsitePerformance(UtilPerf):
         menu_aa.parent_id = menu_a
 
         self.assertEqual(self._get_url_hot_query(self.page.url), 6)
-        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 11)
+        self.assertEqual(self._get_url_hot_query(self.page.url, cache=False), 10)
 
+    @mute_logger('odoo.http')
     def test_50_perf_sql_web_assets(self):
         # assets route /web/assets/..
         self.url_open('/')  # create assets attachments
diff --git a/addons/website/views/website_templates.xml b/addons/website/views/website_templates.xml
index b30c64684f1..175cbf38684 100644
--- a/addons/website/views/website_templates.xml
+++ b/addons/website/views/website_templates.xml
@@ -51,7 +51,11 @@
             'data-oe-company-name': res_company.name,
         })"/>
     </xpath>
-    <xpath expr="//head" position="before">
+
+    <xpath expr="//head" position="attributes">
+        <attribute name="t-cache">main_object if main_object and main_object._name == 'website.page' and not (editable or translatable) else None</attribute>
+    </xpath>
+    <xpath expr="//head/*[1]" position="before">
         <t t-if="not title">
             <t t-if="not additional_title and main_object and 'name' in main_object">
                 <t t-set="additional_title" t-value="main_object.name"/>
diff --git a/addons/website/views/website_views.xml b/addons/website/views/website_views.xml
index e3de1c49ee1..61fe598156f 100644
--- a/addons/website/views/website_views.xml
+++ b/addons/website/views/website_views.xml
@@ -119,8 +119,6 @@
                                 <field name="website_indexed"/>
                                 <field name="is_published"/>
                                 <field name="date_publish"/>
-                                <field name="cache_time" groups="base.group_no_one"/>
-                                <field name="cache_key_expr" groups="base.group_no_one"/>
                             </group>
                         </group>
                         <label for="menu_ids" string="Related Menu Items"/>
diff --git a/addons/website_blog/tests/test_performance.py b/addons/website_blog/tests/test_performance.py
index 689f462f757..cf0d0fd7ae5 100644
--- a/addons/website_blog/tests/test_performance.py
+++ b/addons/website_blog/tests/test_performance.py
@@ -13,8 +13,8 @@ class TestBlogPerformance(UtilPerf):
             self.env['website'].search([]).channel_id = False
 
     def test_10_perf_sql_blog_standard_data(self):
-        self.assertEqual(self._get_url_hot_query('/blog'), 14)
-        self.assertEqual(self._get_url_hot_query('/blog', cache=False), 14)
+        self.assertEqual(self._get_url_hot_query('/blog'), 11)
+        self.assertEqual(self._get_url_hot_query('/blog', cache=False), 27)
 
     def test_20_perf_sql_blog_bigger_data_scaling(self):
         BlogPost = self.env['blog.post']
@@ -26,10 +26,10 @@ class TestBlogPerformance(UtilPerf):
         for blog_post in blog_posts:
             blog_post.tag_ids += blog_tags
             blog_tags = blog_tags[:-1]
-        self.assertEqual(self._get_url_hot_query('/blog'), 14)
-        self.assertEqual(self._get_url_hot_query('/blog', cache=False), 14)
-        self.assertEqual(self._get_url_hot_query(blog_post[0].website_url), 28)
-        self.assertEqual(self._get_url_hot_query(blog_post[0].website_url, cache=False), 28)
+        self.assertEqual(self._get_url_hot_query('/blog'), 11)
+        self.assertEqual(self._get_url_hot_query('/blog', cache=False), 34)
+        self.assertEqual(self._get_url_hot_query(blog_post[0].website_url), 26)
+        self.assertEqual(self._get_url_hot_query(blog_post[0].website_url, cache=False), 29)
 
     def test_30_perf_sql_blog_bigger_data_scaling(self):
         BlogPost = self.env['blog.post']
@@ -42,6 +42,6 @@ class TestBlogPerformance(UtilPerf):
             blog_post.write({'tag_ids': [[6, 0, random.choices(blog_tags.ids, k=random.randint(0, len(blog_tags)))]]})
 
         self.assertLessEqual(self._get_url_hot_query('/blog'), 29)
-        self.assertLessEqual(self._get_url_hot_query('/blog', cache=False), 28)
+        self.assertLessEqual(self._get_url_hot_query('/blog', cache=False), 71)
         self.assertLessEqual(self._get_url_hot_query(blog_post[0].website_url), 34)
         self.assertLessEqual(self._get_url_hot_query(blog_post[0].website_url, cache=False), 33)
diff --git a/addons/website_payment/models/__init__.py b/addons/website_payment/models/__init__.py
index 08188c1ec48..8d2fcd92b39 100644
--- a/addons/website_payment/models/__init__.py
+++ b/addons/website_payment/models/__init__.py
@@ -5,4 +5,3 @@ from . import account_payment
 from . import payment_acquirer
 from . import payment_transaction
 from . import res_config_settings
-from . import website_page
diff --git a/addons/website_payment/models/website_page.py b/addons/website_payment/models/website_page.py
deleted file mode 100644
index 7c12eccb806..00000000000
--- a/addons/website_payment/models/website_page.py
+++ /dev/null
@@ -1,15 +0,0 @@
-# -*- coding: utf-8 -*-
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-
-from odoo import api, models
-
-
-class Page(models.Model):
-    _inherit = 'website.page'
-
-    @api.model
-    def _get_cached_blacklist(self):
-        return super()._get_cached_blacklist() + (
-            # Contains a form with a dynamically added CSRF token
-            'data-snippet="s_donation"',
-        )
diff --git a/addons/website_sale/controllers/main.py b/addons/website_sale/controllers/main.py
index 908aa98a3a2..eb9acf2ee43 100644
--- a/addons/website_sale/controllers/main.py
+++ b/addons/website_sale/controllers/main.py
@@ -332,7 +332,7 @@ class WebsiteSale(http.Controller):
             categs_domain.append(('id', 'in', search_categories.ids))
         else:
             search_categories = Category
-        categs = Category.search(categs_domain)
+        categs = lazy(lambda: Category.search(categs_domain))
 
         if category:
             url = "/shop/category/%s" % slug(category)
@@ -344,12 +344,12 @@ class WebsiteSale(http.Controller):
         ProductAttribute = request.env['product.attribute']
         if products:
             # get all products without limit
-            attributes = ProductAttribute.search([
+            attributes = lazy(lambda: ProductAttribute.search([
                 ('product_tmpl_ids', 'in', search_product.ids),
                 ('visibility', '=', 'visible'),
-            ])
+            ]))
         else:
-            attributes = ProductAttribute.browse(attributes_ids)
+            attributes = lazy(lambda: ProductAttribute.browse(attributes_ids))
 
         layout_mode = request.session.get('website_sale_shop_layout_mode')
         if not layout_mode:
diff --git a/addons/website_sale/models/__init__.py b/addons/website_sale/models/__init__.py
index cbcc0d2add3..278e5891eea 100644
--- a/addons/website_sale/models/__init__.py
+++ b/addons/website_sale/models/__init__.py
@@ -22,6 +22,5 @@ from . import sale_order
 from . import sale_order_line
 from . import website
 from . import website_base_unit
-from . import website_page
 from . import website_snippet_filter
 from . import website_visitor
diff --git a/addons/website_sale/models/website.py b/addons/website_sale/models/website.py
index 0b2c2d6c417..152676765be 100644
--- a/addons/website_sale/models/website.py
+++ b/addons/website_sale/models/website.py
@@ -273,13 +273,12 @@ class Website(models.Model):
         self = self.with_company(self.company_id)
         SaleOrder = self.env['sale.order'].sudo()
 
-        partner_sudo = self.env.user.partner_id
         sale_order_id = request.session.get('sale_order_id')
 
         if sale_order_id:
             sale_order_sudo = SaleOrder.browse(sale_order_id).exists()
         elif not self.env.user._is_public():
-            sale_order_sudo = partner_sudo.last_website_so_id
+            sale_order_sudo = self.env.user.partner_id.last_website_so_id
             if sale_order_sudo:
                 available_pricelists = self.get_pricelist_available()
                 if sale_order_sudo.pricelist_id not in available_pricelists:
@@ -309,6 +308,8 @@ class Website(models.Model):
         # Only set when neeeded
         pricelist_id = False
 
+        partner_sudo = self.env.user.partner_id
+
         # cart creation was requested
         if not sale_order_sudo:
             so_data = self._prepare_sale_order_values(partner_sudo)
diff --git a/addons/website_sale/models/website_page.py b/addons/website_sale/models/website_page.py
deleted file mode 100644
index 14fa5b7e1b8..00000000000
--- a/addons/website_sale/models/website_page.py
+++ /dev/null
@@ -1,14 +0,0 @@
-# -*- coding: utf-8 -*-
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-from odoo import models
-from odoo.http import request
-
-
-class WabsitePage(models.AbstractModel):
-    _inherit = 'website.page'
-
-    def _get_cache_key(self, req):
-        cart = request.website.sale_get_order()
-        cache_key = (cart and cart.cart_quantity or 0,)
-        cache_key += super()._get_cache_key(req)
-        return cache_key
diff --git a/odoo/addons/base/models/res_lang.py b/odoo/addons/base/models/res_lang.py
index 861dc1b6ed2..56cfa0ad650 100644
--- a/odoo/addons/base/models/res_lang.py
+++ b/odoo/addons/base/models/res_lang.py
@@ -201,6 +201,10 @@ class Lang(models.Model):
     def _lang_get_id(self, code):
         return self.with_context(active_test=True).search([('code', '=', code)]).id
 
+    @tools.ormcache('code')
+    def _lang_get_direction(self, code):
+        return self.with_context(active_test=True).search([('code', '=', code)]).direction
+
     @tools.ormcache('url_code')
     def _lang_get_code(self, url_code):
         return self.with_context(active_test=True).search([('url_code', '=', url_code)]).code or url_code