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.
28 Koha::Objects - Koha Object set base class
33 my @objects = Koha::Objects->search({ borrowernumber => $borrowernumber});
37 This class must be subclassed.
45 =head3 Koha::Objects->new();
47 my $object = Koha::Objects->new();
55 bless( $self, $class );
58 =head3 Koha::Objects->_new_from_dbic();
60 my $object = Koha::Objects->_new_from_dbic( $resultset );
65 my ( $class, $resultset ) = @_;
66 my $self = { _resultset => $resultset };
68 bless( $self, $class );
71 =head3 Koha::Objects->find();
73 my $object = Koha::Objects->find($id);
74 my $object = Koha::Objects->find( { keypart1 => $keypart1, keypart2 => $keypart2 } );
79 my ( $self, $id ) = @_;
81 croak 'Cannot use "->find" in list context' if wantarray;
83 return unless defined($id);
85 my $result = $self->_resultset()->find($id);
87 return unless $result;
89 my $object = $self->object_class()->_new_from_dbic( $result );
94 =head3 Koha::Objects->find_or_create();
96 my $object = Koha::Objects->find_or_create( $attrs );
101 my ( $self, $params ) = @_;
103 my $result = $self->_resultset->find_or_create($params);
105 return unless $result;
107 my $object = $self->object_class->_new_from_dbic($result);
112 =head3 Koha::Objects->search();
114 my @objects = Koha::Objects->search($params);
119 my ( $self, $params, $attributes ) = @_;
122 my @dbic_rows = $self->_resultset()->search($params, $attributes);
124 return $self->_wrap(@dbic_rows);
128 my $class = ref($self) ? ref($self) : $self;
129 my $rs = $self->_resultset()->search($params, $attributes);
131 return $class->_new_from_dbic($rs);
135 =head3 search_related
137 my @objects = Koha::Objects->search_related( $rel_name, $cond?, \%attrs? );
138 my $objects = Koha::Objects->search_related( $rel_name, $cond?, \%attrs? );
140 Searches the specified relationship, optionally specifying a condition and attributes for matching records.
145 my ( $self, $rel_name, @params ) = @_;
147 return if !$rel_name;
149 my @dbic_rows = $self->_resultset()->search_related($rel_name, @params);
150 return if !@dbic_rows;
151 my $object_class = _get_objects_class( $dbic_rows[0]->result_class );
153 eval "require $object_class";
154 return _wrap( $object_class, @dbic_rows );
157 my $rs = $self->_resultset()->search_related($rel_name, @params);
159 my $object_class = _get_objects_class( $rs->result_class );
161 eval "require $object_class";
162 return _new_from_dbic( $object_class, $rs );
168 my $object = Koha::Objects->search({}, { rows => 1 })->single
170 Returns one and only one object that is part of this set.
171 Returns undef if there are no objects found.
173 This is optimal as it will grab the first returned result without instantiating
177 http://search.cpan.org/dist/DBIx-Class/lib/DBIx/Class/Manual/Cookbook.pod#Retrieve_one_and_only_one_row_from_a_resultset
184 my $single = $self->_resultset()->single;
185 return unless $single;
187 return $self->object_class()->_new_from_dbic($single);
190 =head3 Koha::Objects->next();
192 my $object = Koha::Objects->next();
194 Returns the next object that is part of this set.
195 Returns undef if there are no more objects to return.
202 my $result = $self->_resultset()->next();
203 return unless $result;
205 my $object = $self->object_class()->_new_from_dbic( $result );
210 =head3 Koha::Objects->last;
212 my $object = Koha::Objects->last;
214 Returns the last object that is part of this set.
215 Returns undef if there are no object to return.
222 my $count = $self->_resultset->count;
223 return unless $count;
225 my ( $result ) = $self->_resultset->slice($count - 1, $count - 1);
227 my $object = $self->object_class()->_new_from_dbic( $result );
234 =head3 Koha::Objects->reset();
236 Koha::Objects->reset();
238 resets iteration so the next call to next() will start agein
239 with the first object in a set.
246 $self->_resultset()->reset();
251 =head3 Koha::Objects->as_list();
253 Koha::Objects->as_list();
255 Returns an arrayref of the objects in this set.
262 my @dbic_rows = $self->_resultset()->all();
264 my @objects = $self->_wrap(@dbic_rows);
266 return wantarray ? @objects : \@objects;
269 =head3 Koha::Objects->unblessed
271 Returns an unblessed representation of objects.
278 return [ map { $_->unblessed } $self->as_list ];
281 =head3 Koha::Objects->get_column
283 Return all the values of this set for a given column
288 my ($self, $column_name) = @_;
289 return $self->_resultset->get_column( $column_name )->all;
292 =head3 Koha::Objects->TO_JSON
294 Returns an unblessed representation of objects, suitable for JSON output.
301 return [ map { $_->TO_JSON } $self->as_list ];
304 =head3 Koha::Objects->_wrap
306 wraps the DBIC object in a corresponding Koha object
311 my ( $self, @dbic_rows ) = @_;
313 my @objects = map { $self->object_class->_new_from_dbic( $_ ) } @dbic_rows;
318 =head3 Koha::Objects->_resultset
320 Returns the internal resultset or creates it if undefined
328 $self->{_resultset} ||=
329 Koha::Database->new()->schema()->resultset( $self->_type() );
331 return $self->{_resultset};
334 return Koha::Database->new()->schema()->resultset( $self->_type() );
338 sub _get_objects_class {
342 if( $type->can('koha_objects_class') ) {
343 return $type->koha_objects_class;
345 $type =~ s|Schema::Result::||;
351 my @columns = Koha::Objects->columns
353 Return the table columns
359 return Koha::Database->new->schema->resultset( $class->_type )->result_source->columns;
364 The autoload method is used call DBIx::Class method on a resultset.
366 Important: If you plan to use one of the DBIx::Class methods you must provide
367 relevant tests in t/db_dependent/Koha/Objects.t
368 Currently count, pager, update and delete are covered.
373 my ( $self, @params ) = @_;
375 my @known_methods = qw( count pager update delete result_class single slice );
376 my $method = our $AUTOLOAD;
379 carp "The method $method is not covered by tests" and return unless grep {/^$method$/} @known_methods;
380 my $r = eval { $self->_resultset->$method(@params) };
382 carp "No method $method found for " . ref($self) . " " . $@;
390 The _type method must be set for all child classes.
391 The value returned by it should be the DBIC resultset name.
392 For example, for holds, _type should return 'Reserve'.
400 This method must be set for all child classes.
401 The value returned by it should be the name of the Koha
402 object class that is returned by this class.
403 For example, for holds, object_class should return 'Koha::Hold'.
413 Kyle M Hall <kyle@bywatersolutions.com>