[FIX] website_event: avoid traceback when page doesn't exists

The controller /event/<event_id>/page/<page> raise exception if page is not existing.

Allow to pass the template reference when user are creating a new page.
Without it, it is impossible for the end user to create a website_event page without
change manually the xml id because the xml id is based on the module from the template.

This fix is retro compatible, because from_template will be ignored until next update
of website. And during update from website, website_event will be updated because it's a
dependance and so the default_page template created.

addons/website/controllers/main.py

@@ -180,8 +180,11 @@ class Website(openerp.addons.web.controllers.main.Home):
     # Edit
     #------------------------------------------------------
     @http.route('/website/add/<path:path>', type='http', auth="user", website=True)
-    def pagenew(self, path, noredirect=False, add_menu=None):
-        xml_id = request.registry['website'].new_page(request.cr, request.uid, path, context=request.context)
+    def pagenew(self, path, noredirect=False, add_menu=None, template=False):
+        if template:
+            xml_id = request.registry['website'].new_page(request.cr, request.uid, path, template=template, context=request.context)
+        else:
+            xml_id = request.registry['website'].new_page(request.cr, request.uid, path, context=request.context)
         if add_menu:
             request.registry['website.menu'].create(
                 request.cr, request.uid, {

addons/website/models/ir_ui_view.py

@@ -106,6 +106,7 @@ class view(osv.osv):
             domain = [('key', '=', xml_id), '|', ('website_id', '=', context['website_id']), ('website_id', '=', False)]
             [view_id] = self.search(cr, uid, domain, order='website_id', limit=1, context=context) or [None]
             if not view_id:
+                _logger.warning("Could not find view object with xml_id '%s'" % (xml_id))
                 raise ValueError('View %r in website %r not found' % (xml_id, context['website_id']))
         else:
             view_id = super(view, self).get_view_id(cr, uid, xml_id, context=context)

addons/website/views/website_templates.xml

@@ -645,7 +645,7 @@
         <div class="container">
             <div class="well mt32">
                 <p>This page does not exists, but you can create it as you are administrator of this site.</p>
-                <a class="btn btn-primary" t-attf-href="/website/add/#{ path }">Create Page</a>
+                <a class="btn btn-primary" t-attf-href="/website/add/#{ path }#{ from_template and '?template=%s' % from_template }">Create Page</a>
             </div>
             <div class="text-center text-muted">Edit the content below this line to adapt the default "page not found" page.</div>
         </div>

addons/website_event/controllers/main.py

@@ -2,6 +2,7 @@
 
 import babel.dates
 import time
+import re
 import werkzeug.urls
 from datetime import datetime, timedelta
 from dateutil.relativedelta import relativedelta
@@ -162,6 +163,14 @@ class website_event(http.Controller):
         if '.' not in page:
             page = 'website_event.%s' % page
 
+        try:
+            request.website.get_template(page)
+        except ValueError:
+            # page not found
+            values['path'] = re.sub(r"^website_event\.", '', page)
+            values['from_template'] = 'website_event.default_page'  # .strip('website_event.')
+            page = 'website.page_404'
+
         return request.website.render(page, values)
 
     @http.route(['/event/<model("event.event"):event>'], type='http', auth="public", website=True)

addons/website_event/views/website_event.xml

@@ -257,6 +257,13 @@
     </t>
 </template>
 
+<template id="default_page">
+    <t t-call="website.layout">
+        <div class="oe_structure oe_empty"/>
+    </t>
+</template>
+
+
 <template id="event_details">
     <t t-call="website_event.layout">
         <div itemscope="itemscope" itemtype="http://schema.org/Event" class="container">