From: Kieren Diment <diment@gmail.com>
Date: Thu, 2 Mar 2006 02:10:03 +0000 (+0000)
Subject: Altered example to populate the db with DBIC
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=a15b805965f79e5f819e387878179392dba4f8ca;p=dbsrgits%2FDBIx-Class-Historic.git

Altered example to populate the db with DBIC
---

diff --git a/lib/DBIx/Class/Manual/Example.pod b/lib/DBIx/Class/Manual/Example.pod
index 365896e..9b7763f 100644
--- a/lib/DBIx/Class/Manual/Example.pod
+++ b/lib/DBIx/Class/Manual/Example.pod
@@ -4,7 +4,9 @@ DBIx::Class::Manual::Example - Simple CD database example
 
 =head1 DESCRIPTION
 
-This tutorial will guide you through the proeccess of setting up and testing a very basic CD database using Mysql, with DBIx::Class::Schema as the database frontend.
+This tutorial will guide you through the proeccess of setting up and
+testing a very basic CD database using SQLite, with DBIx::Class::Schema
+as the database frontend.
 
 The database consists of the following:
 
@@ -23,62 +25,46 @@ And these rules exists:
 
 =head2 Installation
 
-=head3 Create the database/tables and populate them with a few records
+Install DBIx::Class via CPAN should be sufficient.
 
-  CREATE DATABASE cdtestdb ;
-  USE cdtestdb;
+=head3 Create the database/tables.
 
-  CREATE TABLE artist (
-   artistid INT NOT NULL AUTO_INCREMENT ,
-   name CHAR( 40 ) NOT NULL ,
-   PRIMARY KEY ( artistid ) 
-  );
+First make and change the directory:
 
-  CREATE TABLE cd (
-   cdid INT NOT NULL AUTO_INCREMENT ,
-   artist INT NOT NULL ,
-   title CHAR( 40 ) NOT NULL ,
-   PRIMARY KEY ( cdid ) 
-  );
+ mkdir app
+ cd app
 
-  CREATE TABLE track (
-   trackid INT NOT NULL AUTO_INCREMENT ,
-   cd INT NOT NULL ,
-   title CHAR( 40 ) NOT NULL ,
-   PRIMARY KEY ( trackid )
-  ;
+This example uses SQLite which is a dependency of DBIx::Class, so you
+shouldn't have to install extra software.
 
+Save the following into a example.sql
 
-  INSERT INTO artist VALUES
-   (NULL,'Michael Jackson'),
-   (NULL,'Eminem');
- 
-  INSERT INTO cd VALUES
-   (NULL,'1','Thriller'),
-   (NULL,'1','Bad'),
-   (NULL,'2','The Marshall Mathers LP');
- 
-  INSERT INTO track VALUES
-   (NULL,'1','Beat it'),
-   (NULL,'1','Billie Jean'),
-   (NULL,'2','Dirty Diana'),
-   (NULL,'2','Smooth Criminal'),
-   (NULL,'2','Leave Me Alone'),
-   (NULL,'3','Stan'),
-   (NULL,'3','The Way I Am');
+ CREATE TABLE artist (
+ artistid INTEGER PRIMARY KEY,
+ name TEXT NOT NULL 
+ );
+
+ CREATE TABLE cd (
+ cdid INTEGER PRIMARY KEY,
+ artist INTEGER NOT NULL REFERENCES artist(id)
+ title TEXT NOT NULL);
 
+ CREATE TABLE track (
+ trackid INTEGER PRIMARY KEY,
+ cd INTEGER NOT NULL REFERENCES cd(id),
+ title TEXT NOT NULL) ;
 
+and create the sqlite database file:
+
+sqlite3 example.db < example.sql
 
 =head3 Set up DBIx::Class::Schema
 
 First, create some dirs and change working directory:
 
- mkdir app
- mkdir app/DB
- mkdir app/DB/Main
- cd app
+ mkdir DB
+ mkdir DB/Main
 
-   
 Then, create the following DBIx::Class::Schema classes:
 
 DB/Main.pm:
@@ -113,10 +99,10 @@ DB/Main/CD.pm:
  __PACKAGE__->set_primary_key('cdid');
  __PACKAGE__->belongs_to('artist' => 'DB::Main::Artist');
  __PACKAGE__->has_many('tracks' => 'DB::Main::Track');
-   
+
  1;
 
-   
+
 DB/Main/Track.pm:
 
  package DB::Main::Track;
@@ -126,11 +112,75 @@ DB/Main/Track.pm:
  __PACKAGE__->add_columns(qw/ trackid cd title/);
  __PACKAGE__->set_primary_key('trackid');
  __PACKAGE__->belongs_to('cd' => 'DB::Main::CD');
-  
+
  1;
 
 
-=head3 Create and run the test script
+=head3 Write a script to insert some records.
+
+insertdb.pl
+
+ #!/usr/bin/perl -w
+
+ use DB::Main;
+ use strict;
+
+ my $schema = DB::Main->connect('dbi:SQLite:dbic_test.db');
+
+ #  here's some of the sql that is going to be generated by the schema
+ #  INSERT INTO artist VALUES (NULL,'Michael Jackson');
+ #  INSERT INTO artist VALUES (NULL,'Eminem');
+
+ my @artists = (['Michael Jackson'], ['Eminem']);
+ $schema->populate('Artist', [
+     [qw/name/],
+     @artists,
+ ]);
+
+ my %albums = (
+     'Thriller' => 'Michael Jackson',
+     'Bad' => 'Michael Jackson',
+     'The Marshall Mathers LP' => 'Eminem',
+     );
+
+ my @cds;
+ foreach my $lp (keys %albums) {
+     my $artist = $schema->resultset('Artist')->search({
+         name => $albums{$lp}
+     });
+     push @cds, [$lp, $artist->first];
+ }
+
+ $schema->populate('CD', [
+     [qw/title artist/],
+     @cds,
+ ]);
+
+
+ my %tracks = (
+     'Beat It'         => 'Thriller',
+     'Billie Jean'     => 'Thriller',
+     'Dirty Diana'     => 'Bad',
+     'Smooth Criminal' => 'Bad',
+     'Leave Me Alone'  => 'Bad',
+     'Stan'            => 'The Marshall Mathers LP',
+     'The Way I Am'    => 'The Marshall Mathers LP',
+ );
+
+ my @tracks;
+ foreach my $track (keys %tracks) {
+     my $cdname = $schema->resultset('CD')->search({
+         title => $tracks{$track},
+     });
+     push @tracks, [$cdname->first, $track];
+ }
+
+ $schema->populate('Track',[
+     [qw/cd title/],
+     @tracks,
+ ]);
+
+=head3 Create and run the scripts
 
 testdb.pl:
 
@@ -286,8 +336,20 @@ It should output:
  get_artist_by_cd(The Marshall Mathers LP):
  Eminem
 
+=head1 Notes
+
+With these scripts we're relying on @INC looking in the current
+working directory.  You may want to add the DB namespaces to @INC in a
+different way when it comes to deployemnt.
+
+The testdb.pl script is an excellent start for testing your database
+model.
+
+=head1 TODO
+
 =head1 AUTHOR
 
-  sc_
+  sc_ from IRC.  Please credit yourself properly!
+  Kieren Diment <kd@totaldatasolution.com>
 
 =cut