Projects quickstarted on 2.1 should mostly work out of the box.
Main points of interest when upgrading from 2.1 to 2.2 are related to some features deprecated in 2.1 that now got removed, to the new ToscaWidgets2 support and to the New Authentication layer.
Both ToscaWidgets2 and the new auth layer are disabled by default, so they should not get in your way unless you explicitly want.
tg.url changed in release 2.1, in 2.0 parameters for the url could be passed as paremeters for the tg.url function. This continued to work in 2.1 but provided a DeprecationWarning. Since 2.1 parameters to the url call must be passed in the params argument as a dictionary. Support for url parameters passed as arguments have been totally removed in 2.2
use_legacy_renderer option isn’t supported anymore. Legacy renderers (Buffets) got deprecated in previous versions and are not available anymore in 2.2.
__before__ and __after__ controller methods got deprecated in 2.1 and are not called anymore, make sure you switched to the new _before and _after methods.
If you want to keep using ToscaWidgets1 simply don’t install ToscaWidgets2 in your enviroment.
If your project has been quickstarted before 2.2 and uses ToscaWidgets1 it can continue to work that way, by default projects that don’t enable tw2 in any way will continue to use ToscaWidgets1.
If you install tw2 packages in your environment the admin interface, sprox, crud and all the functions related to form generation will switch to ToscaWidgets2. This will force you to enable tw2 wit the use_toscawidgets2 option, otherwise they will stop working.
So if need to keep using ToscaWidgets1 only, don’t install any tw2 package.
Mixing the two widgets library is perfectly possible and can be achieved using both the use_toscawidgets and use_toscawidgets2 options. When ToscaWidgets2 is installed the admin, sprox and the crud controller will switch to tw2, this will require you to enable the use_toscawidgets2 option.
If you manually specified any widget inside Sprox forms or CrudRestController you will have to migrate those to tw2. All the other forms in your application can keep being ToscaWidgets1 forms and widgets.
Switching to tw2 can be achieved by simply placing the prefer_toscawidgets2 option in your config/app_cfg.py. This will totally disable ToscaWidgets1, being it installed or not. So all your forms will have to be migrated to ToscaWidgets2.
2.2 release introduced a new authentication layer to support repoze.who v2 and prepare for moving forward to Python3. When the new authentication layer is not in use, the old one based on repoze.what, repoze.who v1 and repoze.who-testutil will be used.
As 2.1 applications didn’t explicitly enable the new authentication layer they should continue to work as before.
Switching to the new authentication layer should be quite straightforward for applications that didn’t customize authentication. The new layer gets enabled only when a base_config.sa_auth.authmetadata object is present inside your config/app_cfg.py.
To switch a plain project to the new authentication layer simply add those lines to your app_cfg.py:
from tg.configuration.auth import TGAuthMetadata #This tells to TurboGears how to retrieve the data for your user class ApplicationAuthMetadata(TGAuthMetadata): def __init__(self, sa_auth): self.sa_auth = sa_auth def get_user(self, identity, userid): return self.sa_auth.dbsession.query(self.sa_auth.user_class).filter_by(user_name=userid).first() def get_groups(self, identity, userid): return [g.group_name for g in identity['user'].groups] def get_permissions(self, identity, userid): return [p.permission_name for p in identity['user'].permissions] base_config.sa_auth.authmetadata = ApplicationAuthMetadata(base_config.sa_auth)
If you customized authentication in any way, you will probably have to port forward all your customizations, in this case, if things get too complex you can keep remaining on the old authentication layer, things will continue to work as before.
After enabling the new authentication layer you will have to switch your repoze.what imports to tg imports:
#from repoze.what import predicates becames from tg import predicates
All the predicates previously available in repoze.what should continue to be available. Your project should now be able to upgrade to repoze.who v2, before doing that remember to remove the following packages which are not in use anymore and might conflict with repoze.who v2:
The only repoze.who packages you should end up having installed are: