[FIX] dbfilter_from_header: prevent autoloading

dbfilter_from_header/README.rst

@@ -16,10 +16,10 @@ Installation
 To install this module, you only need to add it to your addons, and load it as
 a server-wide module.
 
-This can be done with the ``load`` parameter in ``/etc/odoo.conf`` or with the
-``--load`` command-line parameter
+This can be done with the ``server_wide_modules`` parameter in ``/etc/odoo.conf``
+or with the ``--load`` command-line parameter
 
-``load = "web, dbfilter_from_header"``
+``server_wide_modules = "web, dbfilter_from_header"``
 
 Configuration
 =============
@@ -39,6 +39,9 @@ applied before looking at the regular expression in the header.
 
   ``RequestHeader set X-Odoo-dbfilter [your filter regex]``
 
+And make sure that proxy mode is enabled in Odoo's configuration file:
+
+``proxy_mode = True``
 
 Bug Tracker
 ===========

dbfilter_from_header/override.py

@@ -3,8 +3,10 @@
 # Copyright 2018 Quartile Limited
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
+import logging
 import re
 from odoo import http
+from odoo.tools import config
 
 db_filter_org = http.db_filter
 
@@ -18,4 +20,8 @@ def db_filter(dbs, httprequest=None):
     return dbs
 
 
-http.db_filter = db_filter
+if config.get('proxy_mode') and \
+   'dbfilter_from_header' in config.get('server_wide_modules'):
+    _logger = logging.getLogger(__name__)
+    _logger.info('monkey patching http.db_filter')
+    http.db_filter = db_filter