Introduction to horus
horus provides generic user registration for the Pyramid web framework, if your web app uses sqlalchemy.
It is a pluggable web application that provides user registration, login, logout and change password functionality. horus follows a policy of minimal interference, so your app can mostly keep its existing models.
Create a virtualenv and activate it. Install pyramid and create your pyramid project.
Edit your setup.py to add "horus" to the dependencies in the install_requires list.
python setup.py developon your project to install all dependencies into your virtualenv.
Create your SQLAlchemy declarative initialization.
Create models inheriting from horus' abstract models. Find an example in the file horus/tests/models.py.
Alternatively, use the horus scaffold script:
horus_scaffold development.ini > your_app/auth_models.py
Then all you need to do is tell the class where to find your declarative base you and are good to go!
Include horus inside your
main()function like this:
# Tell horus which SQLAlchemy scoped session to use: from hem.interfaces import IDBSession registry = config.registry registry.registerUtility(my_sqlalchemy_scoped_session, IDBSession) config.include('horus') config.scan_horus(auth_models_package_or_module)
With the above
config.scan_horus()call, you need to edit your .ini configuration file and tell horus which model classes to use like this:
horus.user_class = my_app.models:User horus.activation_class = my_app.models:Activation
As an alternative to
config.scan_horus()plus that configuration, you can register the classes explicitly if you so prefer. This must be done above
# Tell horus which models to use: from horus.interfaces import IUserClass, IActivationClass registry.registerUtility(User, IUserClass) registry.registerUtility(Activation, IActivationClass) config.include('horus')
horus.logout_redirect(in your .ini configuration file) to set the redirection routes.
If you haven't done so yet, configure an HTTP session factory according to the Sessions chapter of the Pyramid documentation.
Create your database and tables. Maybe even an initial user.
Be sure to pass an
authentication_policyargument in the
config = Configurator(...)call. Refer to Pyramid docs for details.
By now the login form should appear at /login, but /register shouldn't.
Include the package pyramid_mailer for the validation e-mail and "forgot password" e-mail:
The /register form should appear, though ugly. Now you have a choice regarding user activation by email:
You may just disable it by setting, in your .ini file:
horus.require_activation = False
Otherwise, configure pyramid_mailer according to its documentation and test the registration page.
If you are using pyramid_tm or the ZopeTransactionManager, your minimal integration is done. (The pages are ugly, but working. Keep reading...)
Need to session.commit()?
horus does not require pyramid_tm or the ZopeTransactionManager with your session but if you do not use them you do have to take one extra step. We don't commit transactions for you because that just wouldn't be nice!
All you have to do is subscribe to the extension events and commit the session yourself. This also gives you the chance to do some extra processing:
from horus.events import ( PasswordResetEvent, NewRegistrationEvent, RegistrationActivatedEvent, ProfileUpdatedEvent) def handle_request(event): request = event.request session = request.registry.getUtility(IDBSession) session.commit() self.config.add_subscriber(handle_request, PasswordResetEvent) self.config.add_subscriber(handle_request, NewRegistrationEvent) self.config.add_subscriber(handle_request, RegistrationActivatedEvent) self.config.add_subscriber(handle_request, ProfileUpdatedEvent)
Changing the forms
If you would like to modify any of the forms, you just need to register the new deform class to be used.
The interfaces you have available to override from horus.interfaces are:
This is how you would do it (MyForm being a custom deform Form class):
Changing the templates
If you would like to substitute the templates you can use pyramid's override_asset:
The templates you have available to override are:
If you would like to override the templates with Jinja2, or any other templating language, just override the view configuration:
config.add_view('horus.views.AuthController', attr='login', route_name='login', renderer='yourapp:templates/login.jinja2') config.add_view('horus.views.ForgotPasswordController', attr='forgot_password', route_name='forgot_password', renderer='yourapp:templates/forgot_password.jinja2') config.add_view('horus.views.ForgotPasswordController', attr='reset_password', route_name='reset_password', renderer='yourapp:templates/reset_password.jinja2') config.add_view('horus.views.RegisterController', attr='register', route_name='register', renderer='yourapp:templates/register.jinja2') config.add_view('horus.views.ProfileController', attr='profile', route_name='profile', renderer='yourapp:templates/profile.jinja2')
Take a look at this class. This is where we store all the strings in horus. If you'd like to change one or two messages, simply subclass this, then do:
from horus.interfaces import IUIStrings config.registry.registerUtility(MyStringsClass, IUIStrings)
Changing the primary key column name
If you wish to override the primary key attribute name, you can do so by creating a new mixin class:
class NullPkMixin(Base): abstract = True _idAttribute = 'pk' @declared_attr def pk(self): return Base.pk @declared_attr def id(self): return None class User(NullPkMixin, UserMixin): pass
If you would like to help make any changes to horus, you can run its unit tests with py.test:
To check test coverage:
py.test --cov-report term-missing --cov horus
The tests can also be run in parallel:
We are using this build server: http://travis-ci.org/#!/eventray/horus