3 # Copyright ByWater Solutions 2014
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it under the
8 # terms of the GNU General Public License as published by the Free Software
9 # Foundation; either version 3 of the License, or (at your option) any later
12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 # A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License along
17 # with Koha; if not, write to the Free Software Foundation, Inc.,
18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 use List::MoreUtils qw( none );
30 Koha::Objects - Koha Object set base class
35 my @objects = Koha::Objects->search({ borrowernumber => $borrowernumber});
39 This class must be subclassed.
47 =head3 Koha::Objects->new();
49 my $object = Koha::Objects->new();
57 bless( $self, $class );
60 =head3 Koha::Objects->_new_from_dbic();
62 my $object = Koha::Objects->_new_from_dbic( $resultset );
67 my ( $class, $resultset ) = @_;
68 my $self = { _resultset => $resultset };
70 bless( $self, $class );
73 =head3 Koha::Objects->find();
75 Similar to DBIx::Class::ResultSet->find this method accepts:
76 \%columns_values | @pk_values, { key => $unique_constraint, %attrs }?
77 Strictly speaking, columns_values should only refer to columns under an
80 my $object = Koha::Objects->find( { col1 => $val1, col2 => $val2 } );
81 my $object = Koha::Objects->find( $id );
82 my $object = Koha::Objects->find( $idpart1, $idpart2, $attrs ); # composite PK
87 my ( $self, @pars ) = @_;
89 croak 'Cannot use "->find" in list context' if wantarray;
91 return if !@pars || none { defined($_) } @pars;
93 my $result = $self->_resultset()->find( @pars );
95 return unless $result;
97 my $object = $self->object_class()->_new_from_dbic( $result );
102 =head3 Koha::Objects->find_or_create();
104 my $object = Koha::Objects->find_or_create( $attrs );
109 my ( $self, $params ) = @_;
111 my $result = $self->_resultset->find_or_create($params);
113 return unless $result;
115 my $object = $self->object_class->_new_from_dbic($result);
120 =head3 Koha::Objects->search();
122 my @objects = Koha::Objects->search($params);
127 my ( $self, $params, $attributes ) = @_;
130 my @dbic_rows = $self->_resultset()->search($params, $attributes);
132 return $self->_wrap(@dbic_rows);
136 my $class = ref($self) ? ref($self) : $self;
137 my $rs = $self->_resultset()->search($params, $attributes);
139 return $class->_new_from_dbic($rs);
143 =head3 search_related
145 my @objects = Koha::Objects->search_related( $rel_name, $cond?, \%attrs? );
146 my $objects = Koha::Objects->search_related( $rel_name, $cond?, \%attrs? );
148 Searches the specified relationship, optionally specifying a condition and attributes for matching records.
153 my ( $self, $rel_name, @params ) = @_;
155 return if !$rel_name;
157 my @dbic_rows = $self->_resultset()->search_related($rel_name, @params);
158 return if !@dbic_rows;
159 my $object_class = _get_objects_class( $dbic_rows[0]->result_class );
161 eval "require $object_class";
162 return _wrap( $object_class, @dbic_rows );
165 my $rs = $self->_resultset()->search_related($rel_name, @params);
167 my $object_class = _get_objects_class( $rs->result_class );
169 eval "require $object_class";
170 return _new_from_dbic( $object_class, $rs );
176 my $object = Koha::Objects->search({}, { rows => 1 })->single
178 Returns one and only one object that is part of this set.
179 Returns undef if there are no objects found.
181 This is optimal as it will grab the first returned result without instantiating
185 http://search.cpan.org/dist/DBIx-Class/lib/DBIx/Class/Manual/Cookbook.pod#Retrieve_one_and_only_one_row_from_a_resultset
192 my $single = $self->_resultset()->single;
193 return unless $single;
195 return $self->object_class()->_new_from_dbic($single);
198 =head3 Koha::Objects->next();
200 my $object = Koha::Objects->next();
202 Returns the next object that is part of this set.
203 Returns undef if there are no more objects to return.
210 my $result = $self->_resultset()->next();
211 return unless $result;
213 my $object = $self->object_class()->_new_from_dbic( $result );
218 =head3 Koha::Objects->last;
220 my $object = Koha::Objects->last;
222 Returns the last object that is part of this set.
223 Returns undef if there are no object to return.
230 my $count = $self->_resultset->count;
231 return unless $count;
233 my ( $result ) = $self->_resultset->slice($count - 1, $count - 1);
235 my $object = $self->object_class()->_new_from_dbic( $result );
242 =head3 Koha::Objects->reset();
244 Koha::Objects->reset();
246 resets iteration so the next call to next() will start agein
247 with the first object in a set.
254 $self->_resultset()->reset();
259 =head3 Koha::Objects->as_list();
261 Koha::Objects->as_list();
263 Returns an arrayref of the objects in this set.
270 my @dbic_rows = $self->_resultset()->all();
272 my @objects = $self->_wrap(@dbic_rows);
274 return wantarray ? @objects : \@objects;
277 =head3 Koha::Objects->unblessed
279 Returns an unblessed representation of objects.
286 return [ map { $_->unblessed } $self->as_list ];
289 =head3 Koha::Objects->get_column
291 Return all the values of this set for a given column
296 my ($self, $column_name) = @_;
297 return $self->_resultset->get_column( $column_name )->all;
300 =head3 Koha::Objects->TO_JSON
302 Returns an unblessed representation of objects, suitable for JSON output.
309 return [ map { $_->TO_JSON } $self->as_list ];
312 =head3 Koha::Objects->_wrap
314 wraps the DBIC object in a corresponding Koha object
319 my ( $self, @dbic_rows ) = @_;
321 my @objects = map { $self->object_class->_new_from_dbic( $_ ) } @dbic_rows;
326 =head3 Koha::Objects->_resultset
328 Returns the internal resultset or creates it if undefined
336 $self->{_resultset} ||=
337 Koha::Database->new()->schema()->resultset( $self->_type() );
339 return $self->{_resultset};
342 return Koha::Database->new()->schema()->resultset( $self->_type() );
346 sub _get_objects_class {
350 if( $type->can('koha_objects_class') ) {
351 return $type->koha_objects_class;
353 $type =~ s|Schema::Result::||;
359 my @columns = Koha::Objects->columns
361 Return the table columns
367 return Koha::Database->new->schema->resultset( $class->_type )->result_source->columns;
372 The autoload method is used call DBIx::Class method on a resultset.
374 Important: If you plan to use one of the DBIx::Class methods you must provide
375 relevant tests in t/db_dependent/Koha/Objects.t
376 Currently count, pager, update and delete are covered.
381 my ( $self, @params ) = @_;
383 my @known_methods = qw( count is_paged pager update delete result_class single slice );
384 my $method = our $AUTOLOAD;
387 carp "The method $method is not covered by tests" and return unless grep {/^$method$/} @known_methods;
388 my $r = eval { $self->_resultset->$method(@params) };
390 carp "No method $method found for " . ref($self) . " " . $@;
398 The _type method must be set for all child classes.
399 The value returned by it should be the DBIC resultset name.
400 For example, for holds, _type should return 'Reserve'.
408 This method must be set for all child classes.
409 The value returned by it should be the name of the Koha
410 object class that is returned by this class.
411 For example, for holds, object_class should return 'Koha::Hold'.
421 Kyle M Hall <kyle@bywatersolutions.com>