1. Introduction to CouchDB Jon Allen (JJ) http://perl.jonallen.info - jj@jonallen.info

7. Creating a database Introduction to CouchDB use CouchDB::Client; use Try::Tiny; my $client = CouchDB::Client->new( uri => 'http://localhost:5984' ); my $db = $client->newDB('jj_test'); # lower case! try { $db->create; } catch { die "Could not create DB"; };

8. Inserting a document Introduction to CouchDB my $client = CouchDB::Client->new(); my $db = $client->newDB('jj_test'); my $doc = $db->newDoc('docid', undef, { type => 'message', text => 'Hello, World', to => ['JJ', 'Barbie', 'Brian'], }); try { $doc->create; } catch { die "Could not create document"; };

9. Inserting a document Introduction to CouchDB my $client = CouchDB::Client->new(); my $db = $client->newDB('jj_test'); my $doc = $db->newDoc('docid', undef, { type => 'message', text => 'Hello, World', to => ['JJ', 'Barbie', 'Brian'], }); try { $doc->create; } catch { die "Could not create document"; }; Document ID, must be unique Revision ID

10. CouchDB GUI Introduction to CouchDB

11. Querying documents Introduction to CouchDB Map function Key, Value Key, Value Key, Value Key, Value All Documents Query by Key Key, Value Key, Value

15. Creating a view Introduction to CouchDB my $client = CouchDB::Client->new(); my $db = $client->newDB('jj_test'); my $doc = $db->newDesignDoc('_design/myview',undef, { views => { messages_to => { map => $view }, }, }); try { $doc->create; } catch { die "Could not create document"; };

16. Querying a view Introduction to CouchDB use Data::Dumper; my $client = CouchDB::Client->new(); my $db = $client->newDB('jj_test'); my $view = $db->newDesignDoc('_design/myview')->retrieve; my $result = try { $view->queryView('messages_to', (key => 'JJ')); } catch { die "Could not query view"; }; say Dumper($result);

17. Query results Introduction to CouchDB varos:talk_scripts jj$ perl5.10.1 query_view.pl $VAR1 = { 'total_rows' => 3, 'rows' => [ { 'value' => 'Hello, World', 'id' => 'docid', 'key' => 'JJ' } ], 'offset' => 2 };

19. KTHKSBYE! Introduction to CouchDB Thank you for listening! Any questions? http://perl.jonallen.info/talks