Adding DBIx on top of DBI and DBD - First simple example

Using SQL Databases from Perl example from a Well House Consultants training course
More on Using SQL Databases from Perl [link]

This example is described in the following article(s):
• Perl - database access - DBD, DBI and DBIx modules - [link]

Source code: D2.pl Module: P308

# Adding DBIx on top of DBI and DBD - First simple example
# Pull in the class definition for the database

use D2::Main;

use strict;

# Connect to the already existant database
my $schema = D2::Main->connect('dbi:SQLite:d2_test.sqlite');

# Set up some data within Perl that needs to be added to the tables
my @teamadditions = ( ["Tom", 5], ["Jerry", 6]);

# Go add it to the tables
$schema->populate('People', [ [qw/name pid/], @teamadditions ]);

# ------------------------------------------------------

__END__

a) Setup as it starts:
----------------------

munchkin:pl grahamellis$ ls -lR D2*
-rw-r--r-- 1 grahamellis staff 462 21 Dec 12:54 D2.pl
-rw-r--r-- 1 grahamellis staff 605 21 Dec 12:49 D2.sql

D2:
total 8
drwxr-xr-x 3 grahamellis staff 102 21 Dec 12:55 Main
-rw-r--r-- 1 grahamellis staff 93 21 Dec 12:55 Main.pm

D2/Main:
total 0
drwxr-xr-x 3 grahamellis staff 102 21 Dec 12:55 Result

D2/Main/Result:
total 8
-rw-r--r-- 1 grahamellis staff 180 21 Dec 12:55 People.pm

(4 files - D2.pl, D2.sql, D2/Main.pm and D2/Result/People.pm)

b) Create database in SQLite
----------------------------

munchkin:pl grahamellis$ sqlite3 d2_test.sqlite
SQLite version 3.6.12
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> .read D2.sql
sqlite> select * from people;
1|Graham
2|Daniel
3|Rachel
4|Sarah
sqlite>

c) Run Application to insert more data
--------------------------------------

Note - done without the app itself knowing the underlying table structure

munchkin:pl grahamellis$ perl D2.pl
munchkin:pl grahamellis$

d) Run SQLite again to check that the data was added!
-----------------------------------------------------

munchkin:pl grahamellis$ sqlite3 d2_test.sqlite
SQLite version 3.6.12
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> select * from people;
1|Graham
2|Daniel
3|Rachel
4|Sarah
5|Tom
6|Jerry
sqlite>

Learn about this subject

This module and example are covered on the following public courses:
* MySQL
* Perl for Larger Projects
Also available on on site courses for larger groups

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