By Jonathan Rockway
Layout, boost, attempt, and install purposes with the open-source MVC Catalyst framework. This booklet is for net builders with simple Perl talents who're new to Catalyst. when you are fascinated by Ruby on Rails yet would favor the positive factors of Rails with the familiarity of Perl, choose this ebook and start.
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Additional resources for Catalyst: Accelerating Perl Web Application Development
We use this ID number to view the person with that ID in the database via the find_or_new DBIC method. The find method by itself will work for locating existing records, but using find_or_new instead will create a new record if there's no matching record already in the database. The new record that is created is not actually written to the database; it only exists in memory. Only when we insert the record explicitly will it be created in the database. This allows us to call find_or_new each time the action is called because we only insert_or_update the record when we've verified that the data is valid.
This gets the first two arguments passed to the Action by Catalyst, $self, and $c. $self is a MyApp::Controller::Hello object, and is not of much use right now. $c is the Catalyst context and contains all the information about our application and the current request (and hence is very useful). Catalyst passes more than just $self and $c, though, so we want to modify that line to read my ($self, $c, @args)=@_;. This will allow us to access the rest of the arguments via the @args array. Arguments are everything in the URL that Catalyst didn't use when matching an action.
Pl model AddressDB DBIC::Schema AddressBook::Schema::AddressDB create=static dbi:SQLite:database This will create a Model called AddressDB, and it will also create a Schema/ AddressDB subdirectory that contains the definition of our database schema in DBIx::Class's (DBIC) format. This schema will be pre-populated with the schema we just created with the sqlite3 utility. Keeping the schema in this format will allow us to deploy to any database system that DBIx::Class supports by simply running the deploy function in your schema.
Catalyst: Accelerating Perl Web Application Development by Jonathan Rockway