Koha/Ratings.pm

   1 package Koha::Ratings;
   2
   3 # This file is part of Koha.
   4 #
   5 # Koha is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # Koha is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  17
  18 use Modern::Perl;
  19
  20 use Carp;
  21
  22 use Koha::Database;
  23
  24 use Koha::Rating;
  25
  26 use base qw(Koha::Objects);
  27
  28 =head1 NAME
  29
  30 Koha::Ratings - Koha Rating Object set class
  31
  32 =head1 API
  33
  34 =head2 Class Methods
  35
  36 =cut
  37
  38 =head3 get_avg_rating
  39
  40 =cut
  41
  42 sub get_avg_rating {
  43     my ( $self ) = @_;
  44
  45     my $sum   = $self->_resultset->get_column('rating_value')->sum();
  46     my $total = $self->count();
  47
  48     my $avg = 0;
  49     if ( $sum and $total ) {
  50         eval { $avg = $sum / $total };
  51     }
  52     $avg = sprintf( "%.1f", $avg );
  53
  54     return $avg;
  55 }
  56
  57 =head3 type
  58
  59 =cut
  60
  61 sub _type {
  62     return 'Rating';
  63 }
  64
  65 sub object_class {
  66     return 'Koha::Rating';
  67 }
  68
  69 1;