/ 
Catalyst-TraitFor-Controller-DBIC-DoesPaging-1.001004
River stage one • 1 direct dependent • 1 total dependent
/ Catalyst::TraitFor::Controller::DBIC::DoesPaging

NAME

Catalyst::TraitFor::Controller::DBIC::DoesPaging - Helps you paginate, search, sort, and more easily using DBIx::Class

VERSION

version 1.001004

SYNOPSIS

package MyApp::Controller::Foo;
use Moose;
BEGIN { extends 'Catalyst::Controller' }
with 'Catalyst::TraitFor::Controller::DBIC::DoesPaging';

sub people {
   my ($self, $c) = @_;
   my $people = $self->page_and_sort(
      $self->search( $self->model('DB::People') )
   );
   # ...
}

DESCRIPTION

This module helps you to map various DBIx::Class features to CGI parameters. For the most part that means it will help you search, sort, and paginate with a minimum of effort and thought.

METHODS

All methods take the context and a ResultSet as their arguments. All methods return a ResultSet.

page_and_sort

my $result_rs  = $self->page_and_sort($c, $c->model('DB::Foo'));

This is a helper method that will first "sort" your data and then "paginate" it.

paginate

my $result_rs  = $self->paginate($c, $c->model('DB::Foo'));

Paginates the passed in resultset based on the following CGI parameters:

start - first row to display
limit - amount of rows per page
my $searched_rs = $self->search($c, $c->model('DB::Foo'));

If the $resultset has a controller_search method it will call that method on the passed in resultset with all of the CGI parameters. I like to have this method look something like the following:

# Base search dispatcher, defined in MyApp::Schema::ResultSet
sub _build_search {
   my ($rs, $dispatch_table, $q) = @_;

   foreach ( keys %{$q} ) {
      if ( my $fn = $dispatch_table->{$_} and $q->{$_} ) {
         my ( $search, $meta ) = $fn->( $q->{$_} );
         $rs = $rs->search($search, $meta);
      }
   }

   return $rs;
}

# search method in specific resultset
sub controller_search {
   my $self   = shift;
   my $params = shift;
   return $self->_build_search({
      status => sub {
         return { 'repair_order_status' => shift }, {};
      },
      part_id => sub {
         return {
            'lineitems.part_id' => { -like => q{%}.shift( @_ ).q{%} }
         }, { join => 'lineitems' };
      },
   },$params);
}

If the controller_search method does not exist, this method will call "simple_search" instead.

sort

my $result_rs  = $self->sort($c, $c->model('DB::Foo'));

Exactly the same as search, except calls controller_sort or "simple_sort". Here is how I use it:

# Base sort dispatcher, defined in MyApp::Schema::ResultSet
sub _build_sort {
   my ($self, $dispatch_table, $default, $q) = @_;

   my %search = ();
   my %meta   = ();

   my $direction = $q->{dir};
   my $sort      = $q->{sort};

   if ( my $fn = $dispatch_table->{$sort} ) {
      my ( $tmp_search, $tmp_meta ) = $fn->( $direction );
      $self = $self->search( $tmp_search, $tmp_meta );
   } elsif ( $sort && $direction ) {
      my ( $tmp_search, $tmp_meta ) = $default->( $sort, $direction );
      $self = $self->search( $tmp_search, $tmp_meta );
   }

   return $self;
}

# sort method in specific resultset
sub controller_sort {
   my $self = shift;
   my $params = shift;
   return $self->_build_sort({
      first_name => sub {
         my $direction = shift;
         return {}, {
            order_by => { "-$direction" => [qw{last_name first_name}] },
         };
      },
   }, sub {
      my $param = shift;
      my $direction = shift;
      return {}, {
         order_by => { "-$direction" => $param },
      };
   },$params);
}

simple_deletion

my $deleted_ids = $self->simple_deletion($c, $c->model('DB::Foo'));

Deletes from the passed in resultset based on the following CGI parameter:

to_delete - values of the ids of items to delete

This is the only method that does not return a ResultSet. Instead it returns an arrayref of the id's that it deleted. If the ResultSet has has a multipk this will expect each tuple of PK's to be separated by commas.

Note that this method uses the $rs->delete method, as opposed to $rs->delete_all

my $searched_rs = $self->simple_search($c, $c->model('DB::Foo'));

Searches the resultset based on all fields in the request, except for fields listed in ignored_params. Searches with $fieldname => { -like => "%$value%" }. If there are multiple values for a CGI parameter it will use all values via an or.

simple_sort

my $sorted_rs = $self->simple_sort($c, $c->model('DB::Foo'));

Sorts the passed in resultset based on the following CGI parameters:

sort - field to sort by, defaults to primarky key
dir  - direction to sort

CONFIG VARIABLES

page_size

Default size of a page. Defaults to 25.

ignored_params

ArrayRef of params that will be ignored in simple_search, defaults to:

[qw{limit start sort dir _dc rm xaction}]

SEE ALSO

Web::Util::DBIC::Paging, which this module is a thin wrapper around

CREDITS

Thanks to Micro Technology Services, Inc. for funding the initial development of this module.

AUTHOR

Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 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.