Provided by: libdbix-class-candy-perl_0.005003-2_all 
NAME
DBIx::Class::Candy - Sugar for your favorite ORM, DBIx::Class
SYNOPSIS
package MyApp::Schema::Result::Artist;
use DBIx::Class::Candy -autotable => v1;
primary_column id => {
data_type => 'int',
is_auto_increment => 1,
};
column name => {
data_type => 'varchar',
size => 25,
is_nullable => 1,
};
has_many albums => 'A::Schema::Result::Album', 'artist_id';
1;
DESCRIPTION
"DBIx::Class::Candy" is a simple sugar layer for definition of DBIx::Class results. Note
that it may later be expanded to add sugar for more "DBIx::Class" related things. By
default "DBIx::Class::Candy":
• turns on strict and warnings
• sets your parent class
• exports a bunch of the package methods that you normally use to define your
DBIx::Class results
• makes a few aliases to make some of the original method names shorter or more clear
• defines very few new subroutines that transform the arguments passed to them
It assumes a DBIx::Class::Core-like API, but you can tailor it to suit your needs.
IMPORT OPTIONS
See "SETTING DEFAULT IMPORT OPTIONS" for information on setting these schema wide.
-base
use DBIx::Class::Candy -base => 'MyApp::Schema::Result';
The first thing you can do to customize your usage of "DBIx::Class::Candy" is change the
parent class. Do that by using the "-base" import option.
-autotable
use DBIx::Class::Candy -autotable => v1;
Don't waste your precious keystrokes typing "table 'buildings'", let "DBIx::Class::Candy"
do that for you! See "AUTOTABLE VERSIONS" for what the existing versions will generate
for you.
-components
use DBIx::Class::Candy -components => ['FilterColumn'];
"DBIx::Class::Candy" allows you to set which components you are using at import time so
that the components can define their own sugar to export as well. See
DBIx::Class::Candy::Exports for details on how that works.
-perl5
use DBIx::Class::Candy -perl5 => v10;
I love the new features in Perl 5.10 and 5.12, so I felt that it would be nice to remove
the boiler plate of doing "use feature ':5.10'" and add it to my sugar importer. Feel
free not to use this.
-experimental
use DBIx::Class::Candy -experimental => ['signatures'];
I would like to use signatures and postfix dereferencing in all of my "DBIx::Class"
classes. This makes that goal trivial.
IMPORTED SUBROUTINES
Most of the imported subroutines are the same as what you get when you use the normal
interface for result definition: they have the same names and take the same arguments. In
general write the code the way you normally would, leaving out the "__PACKAGE__->" part.
The following are methods that are exported with the same name and arguments:
belongs_to
has_many
has_one
inflate_column
many_to_many
might_have
remove_column
remove_columns
resultset_attributes
resultset_class
sequence
source_name
table
There are some exceptions though, which brings us to:
IMPORTED ALIASES
These are merely renamed versions of the functions you know and love. The idea is to make
your result classes a tiny bit prettier by aliasing some methods. If you know your
"DBIx::Class" API you noticed that in the "SYNOPSIS" I used "column" instead of
"add_columns" and "primary_key" instead of "set_primary_key". The old versions work, this
is just nicer. A list of aliases are as follows:
column => 'add_columns',
primary_key => 'set_primary_key',
unique_constraint => 'add_unique_constraint',
relationship => 'add_relationship',
SETTING DEFAULT IMPORT OPTIONS
Eventually you will get tired of writing the following in every single one of your
results:
use DBIx::Class::Candy
-base => 'MyApp::Schema::Result',
-perl5 => v12,
-autotable => v1,
-experimental => ['signatures'];
You can set all of these for your whole schema if you define your own "Candy" subclass as
follows:
package MyApp::Schema::Candy;
use base 'DBIx::Class::Candy';
sub base { $_[1] || 'MyApp::Schema::Result' }
sub perl_version { 12 }
sub autotable { 1 }
sub experimental { ['signatures'] }
Note the "$_[1] ||" in "base". All of these methods are passed the values passed in from
the arguments to the subclass, so you can either throw them away, honor them, die on
usage, or whatever. To be clear, if you define your subclass, and someone uses it as
follows:
use MyApp::Schema::Candy
-base => 'MyApp::Schema::Result',
-perl5 => v18,
-autotable => v1,
-experimental => ['postderef'];
Your "base" method will get "MyApp::Schema::Result", your "perl_version" will get 18, your
"experimental" will get "['postderef']", and your "autotable" will get 1.
SECONDARY API
has_column
There is currently a single "transformer" for "add_columns", so that people used to the
Moose api will feel more at home. Note that this may go into a "Candy Component" at some
point.
Example usage:
has_column foo => (
data_type => 'varchar',
size => 25,
is_nullable => 1,
);
primary_column
Another handy little feature that allows you to define a column and set it as the primary
key in a single call:
primary_column id => {
data_type => 'int',
is_auto_increment => 1,
};
If your table has multiple columns in its primary key, merely call this method for each
column:
primary_column person_id => { data_type => 'int' };
primary_column friend_id => { data_type => 'int' };
unique_column
This allows you to define a column and set it as unique in a single call:
unique_column name => {
data_type => 'varchar',
size => 30,
};
AUTOTABLE VERSIONS
Currently there are two versions:
"v1"
It looks at your class name, grabs everything after "::Schema::Result::" (or
"::Result::"), removes the "::"'s, converts it to underscores instead of camel-case, and
pluralizes it. Here are some examples if that's not clear:
MyApp::Schema::Result::Cat -> cats
MyApp::Schema::Result::Software::Building -> software_buildings
MyApp::Schema::Result::LonelyPerson -> lonely_people
MyApp::DB::Result::FriendlyPerson -> friendly_people
MyApp::DB::Result::Dog -> dogs
'singular'
It looks at your class name, grabs everything after "::Schema::Result::" (or
"::Result::"), removes the "::"'s and converts it to underscores instead of camel-case.
Here are some examples if that's not clear:
MyApp::Schema::Result::Cat -> cat
MyApp::Schema::Result::Software::Building -> software_building
MyApp::Schema::Result::LonelyPerson -> lonely_person
MyApp::DB::Result::FriendlyPerson -> friendly_person
MyApp::DB::Result::Dog -> dog
Also, if you just want to be different, you can easily set up your own naming scheme.
Just add a "gen_table" method to your candy subclass. The method gets passed the class
name and the autotable version, which of course you may ignore. For example, one might
just do the following:
sub gen_table {
my ($self, $class) = @_;
$class =~ s/::/_/g;
lc $class;
}
Which would transform "MyApp::Schema::Result::Foo" into "myapp_schema_result_foo".
Or maybe instead of using the standard "MyApp::Schema::Result" namespace you decided to be
different and do "MyApp::DB::Table" or something silly like that. You could pre-process
your class name so that the default "gen_table" will still work:
sub gen_table {
my $self = shift;
my $class = $_[0];
$class =~ s/::DB::Table::/::Schema::Result::/;
return $self->next::method(@_);
}
AUTHOR
Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>
COPYRIGHT AND LICENSE
This software is copyright (c) 2017 by Arthur Axel "fREW" Schmidt.
This is free software; you can redistribute it and/or modify it under the same terms as
the Perl 5 programming language system itself.