One major factor in Catalyst's success has been extensibility. I plan to
do a series on extensions that I've found useful recently. To kick it off,
I'll feature a model which gives me a simple and useful admin interface to
my DBIx::Class models.
When I first got involved with MVC Web Frameworks like Maypole and Ruby on
Rails, a big selling point was the ability to generate CRUD (Create/Read/
Update/Delete) interfaces to your data model. Ruby on Rails does this through
a mechanism called scaffolding, where it adds a set of actions to your
controller. It soon became apparent that these CRUD frameworks did not live
up to their promise as a base for creating your own custom actions. Usually,
you spend more time customizing these controllers than you would just
implementing the features you require.
However, there is still a good use for these for giving your admins a
direct interface to your data model. There has been several iterations of
these tools for the Catalyst framework, but with Catalyst::Plugin::AutoCRUD,
I've finally found something easy to plug into your existing app, which
integrates well with most setups.
For most apps, all you need to do is plug it into the main application class
by adding AutoCRUD to your list of plugins. This will plug a complete CRUD
application, including controllers and view and templates into your app.
By default it will attach itself at '/autocrud', but you can easily change
that in config. Just add this to your config file:
basepath admin
and it will respond to /admin/* instead. Another common requirement is to
add authentication for the admin interface. One way to accomplish that is
by using Catalyst's auto handler functionality. Add a method like this in
your Root controller
sub auto :Private {
my ( $self, $c ) = @_;
if ($c->action->reverse =~ /^autocrud\//) {
$c->authenticate({},'users');
}
return 1;
}Note that my example is using HTTP Basic auth. The actual authenticate call
needs to be customized for your realm.
AutoCRUD supports multiple DBIC Schemas, and if will automatically provide you
with a list to let you pick which one to work with. After that, you choose
a Result class, and you have access to an extensive AJAX-enhanched database
admin tool. You can search and browse data, as well as edit it and add new
rows easily. AutoCRUD also understands your DBIC relationships, so you can
easily see data related to the current rows.
Like it's predecessors, I do not recommend trying to make this tool
into a generic 'allweb'-application. However, if you use it for what it is,
you can save countless of development hours making trivial admin tools. Since
it works again your DBIC Schema, you'll also get the advantage of keeping
your business logic in the data model. Things like DBIC timestamps will
Just Work.
There still might be some polishing left to do on AutoCRUD, but I already
find it a hugely useful tool. You can install it just like you would any other CPAN module using
$ cpan Catalyst::Plugin::AutoCRUD