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NAME | ||
Catalyst::TraitFor::Model::DBIC::Schema::WithCurrentUser | ||
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SYNOPSIS | ||
package MyApp::Model::DB; | ||
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use Moose; | ||
extends qw/Catalyst::Model::DBIC::Schema/; | ||
with 'Catalyst::TraitFor::Model::DBIC::Schema::WithCurrentUser'; # This is the | ||
# important bit. | ||
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__PACKAGE__->config( | ||
{ schema_class => 'MyApp::Schema', | ||
connect_info => { dsn => 'dbi:SQLite:dbname=:memory:' }, | ||
} | ||
); | ||
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1; | ||
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... | ||
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package MyApp::Schema; | ||
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use Moose; | ||
extends qw/DBIx::Class::Schema/; | ||
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has 'current_user' => ( is => 'rw', ); # This is all you have to add to | ||
# the schema | ||
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__PACKAGE__->load_namespaces; | ||
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1; | ||
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DESCRIPTION | ||
This is a trait for a Catalyst::Model::DBIC::Schema object. All you need | ||
to do is add a current_user to your schema, and then use the role in | ||
your Model::DB. | ||
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This module makes it easy to have a "pre-authorized," schema and | ||
resultsets by using DBIx::Class::Schema::RestrictWithObject. Here's a | ||
real example: | ||
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package MyApp::Schema; | ||
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use Moose; | ||
use List::MoreUtils qw/any/; | ||
extends 'DBIx::Class::Schema'; | ||
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has current_user => ( is => 'rw' ); | ||
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__PACKAGE__->load_components(qw/Schema::RestrictWithObject/); | ||
__PACKAGE__->load_namespaces; | ||
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around resultset => sub { | ||
my ( $orig, $self ) = ( shift, shift ); | ||
my $new_rs = $self->$orig(@_); | ||
if ( any { $new_rs->result_source->source_name eq $_ } | ||
qw/Blog Comment Message/ ) | ||
{ | ||
my $schema = | ||
$self->restrict_with_object( | ||
$self->resultset('Restrictions')->first ); # This is a resultset | ||
# that has methods for | ||
# restricting everything | ||
# in @resultsets_to_restrict; | ||
# see below | ||
my $restrictor = | ||
"restrict_${\$new_rs->result_source->source_name}_resultset"; # This | ||
# is the | ||
# method | ||
# we will call | ||
# in our | ||
# Restrictions | ||
# resultset. | ||
if ( $schema->restricting_object | ||
&& $schema->restricting_object->can($restrictor) ) | ||
{ | ||
$new_rs = $schema->restricting_object->$restrictor($new_rs); | ||
} | ||
} # So, here we restrict the | ||
# schema with a resultset | ||
# returned from our restrictor | ||
# generator. | ||
return $new_rs; | ||
}; | ||
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1; | ||
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Here is an example of what can go on in | ||
MyApp::Schema::Result::Restriction: | ||
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package MyApp::Schema::Result::Restriction; | ||
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use Moose; | ||
use List::MoreUtils qw/any/; | ||
use Method::Signatures::Simple; | ||
extends 'DBIx::Class::Core'; | ||
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__PACKAGE__->table("restriction"); | ||
__PACKAGE__->add_columns( | ||
"approved", | ||
{ data_type => "boolean", default_value => \'false', is_nullable => 0, }, | ||
"approved_by", | ||
{ data_type => "integer", is_nullable => 1, }, | ||
"approved_at", | ||
{ data_type => "datetime", default_value => undef, is_nullable => 1, }, | ||
"item", | ||
{ data_type => "integer", is_foreign_key => 1, is_nullable => 0 }, | ||
); | ||
__PACKAGE__->set_primary_key("item"); | ||
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__PACKAGE__->might_have( | ||
"blog", | ||
"MyApp::Schema::Result::Blog", | ||
{ "foreign.id" => "self.item" }, | ||
{ cascade_copy => 0, cascade_delete => 0 }, | ||
); | ||
__PACKAGE__->might_have( | ||
"comment", | ||
"MyApp::Schema::Result::Comment", | ||
{ "foreign.id" => "self.item" }, | ||
{ cascade_copy => 0, cascade_delete => 0 }, | ||
); | ||
__PACKAGE__->might_have( | ||
"message", | ||
"MyApp::Schema::Result::Message", | ||
{ "foreign.id" => "self.item" }, | ||
{ cascade_copy => 0, cascade_delete => 0 }, | ||
); | ||
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method restrict_Blog_resultset($rs) { | ||
return $self->restriction( "blog", $rs ); | ||
} | ||
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method restrict_Comment_resultset($rs) { | ||
return $self->restriction( "comment", $rs ); | ||
} | ||
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method restrict_Message_resultset($rs) { | ||
return $self->restriction( "message", $rs ); | ||
} | ||
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method restriction( $table, $rs ) { | ||
return $self->result_source->schema | ||
->resultset('Restriction') | ||
->related_resultset($table) | ||
unless $self->result_source->schema->current_user; # Return a restricted | ||
# rs if no user. | ||
return $rs | ||
if any { $_ =~ /admin/ } | ||
$self->result_source->schema->current_user->roles; # Return an unrestricted | ||
# rs if user is an admin | ||
return $self->result_source->schema | ||
->resultset('Restriction') | ||
->related_resultset($table); # Return a restricted | ||
# rs if user is not an | ||
# admin. | ||
} | ||
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1; | ||
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That's about it! | ||
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AUTHOR | ||
Amiri Barksdale <amiri@arisdottle.net> | ||
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SEE ALSO | ||
DBIx::Class::Schema::RestrictWithObject, DBIx::Class, | ||
Catalyst::Model::DBIC::Schema | ||
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LICENSE | ||
This library is free software; you can redistribute it and/or modify it | ||
under the same terms as Perl itself. | ||
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