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
8 # under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # Koha is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
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 It returns undef if no results were found
82 my $object = Koha::Objects->find( { col1 => $val1, col2 => $val2 } );
83 my $object = Koha::Objects->find( $id );
84 my $object = Koha::Objects->find( $idpart1, $idpart2, $attrs ); # composite PK
89 my ( $self, @pars ) = @_;
93 unless (!@pars || none { defined($_) } @pars) {
94 my $result = $self->_resultset()->find(@pars);
96 $object = $self->object_class()->_new_from_dbic($result);
103 =head3 Koha::Objects->find_or_create();
105 my $object = Koha::Objects->find_or_create( $attrs );
110 my ( $self, $params ) = @_;
112 my $result = $self->_resultset->find_or_create($params);
114 return unless $result;
116 my $object = $self->object_class->_new_from_dbic($result);
121 =head3 Koha::Objects->search();
123 my @objects = Koha::Objects->search($params);
128 my ( $self, $params, $attributes ) = @_;
131 my @dbic_rows = $self->_resultset()->search($params, $attributes);
133 return $self->_wrap(@dbic_rows);
137 my $class = ref($self) ? ref($self) : $self;
138 my $rs = $self->_resultset()->search($params, $attributes);
140 return $class->_new_from_dbic($rs);
144 =head3 search_related
146 my @objects = Koha::Objects->search_related( $rel_name, $cond?, \%attrs? );
147 my $objects = Koha::Objects->search_related( $rel_name, $cond?, \%attrs? );
149 Searches the specified relationship, optionally specifying a condition and attributes for matching records.
154 my ( $self, $rel_name, @params ) = @_;
156 return if !$rel_name;
158 my @dbic_rows = $self->_resultset()->search_related($rel_name, @params);
159 return if !@dbic_rows;
160 my $object_class = _get_objects_class( $dbic_rows[0]->result_class );
162 eval "require $object_class";
163 return _wrap( $object_class, @dbic_rows );
166 my $rs = $self->_resultset()->search_related($rel_name, @params);
168 my $object_class = _get_objects_class( $rs->result_class );
170 eval "require $object_class";
171 return _new_from_dbic( $object_class, $rs );
182 if ( Class::Inspector->function_exists( $self->object_class, 'delete' ) ) {
184 $self->_resultset->result_source->schema->txn_do( sub {
185 while ( my $o = $self->next ) {
190 return $objects_deleted;
193 return $self->_resultset->delete;
198 my $object = Koha::Objects->search({}, { rows => 1 })->single
200 Returns one and only one object that is part of this set.
201 Returns undef if there are no objects found.
203 This is optimal as it will grab the first returned result without instantiating
207 http://search.cpan.org/dist/DBIx-Class/lib/DBIx/Class/Manual/Cookbook.pod#Retrieve_one_and_only_one_row_from_a_resultset
214 my $single = $self->_resultset()->single;
215 return unless $single;
217 return $self->object_class()->_new_from_dbic($single);
220 =head3 Koha::Objects->next();
222 my $object = Koha::Objects->next();
224 Returns the next object that is part of this set.
225 Returns undef if there are no more objects to return.
232 my $result = $self->_resultset()->next();
233 return unless $result;
235 my $object = $self->object_class()->_new_from_dbic( $result );
240 =head3 Koha::Objects->last;
242 my $object = Koha::Objects->last;
244 Returns the last object that is part of this set.
245 Returns undef if there are no object to return.
252 my $count = $self->_resultset->count;
253 return unless $count;
255 my ( $result ) = $self->_resultset->slice($count - 1, $count - 1);
257 my $object = $self->object_class()->_new_from_dbic( $result );
264 my $empty_rs = Koha::Objects->new->empty;
266 Sets the resultset empty. This is handy for consistency on method returns
267 (e.g. if we know in advance we won't have results but want to keep returning
275 unless (ref($self)) {
279 $self->_resultset()->set_cache([]);
284 =head3 Koha::Objects->reset();
286 Koha::Objects->reset();
288 resets iteration so the next call to next() will start agein
289 with the first object in a set.
296 $self->_resultset()->reset();
301 =head3 Koha::Objects->as_list();
303 Koha::Objects->as_list();
305 Returns an arrayref of the objects in this set.
312 my @dbic_rows = $self->_resultset()->all();
314 my @objects = $self->_wrap(@dbic_rows);
316 return wantarray ? @objects : \@objects;
319 =head3 Koha::Objects->unblessed
321 Returns an unblessed representation of objects.
328 return [ map { $_->unblessed } $self->as_list ];
331 =head3 Koha::Objects->get_column
333 Return all the values of this set for a given column
338 my ($self, $column_name) = @_;
339 return $self->_resultset->get_column( $column_name )->all;
342 =head3 Koha::Objects->TO_JSON
344 Returns an unblessed representation of objects, suitable for JSON output.
351 return [ map { $_->TO_JSON } $self->as_list ];
354 =head3 Koha::Objects->to_api
356 Returns a representation of the objects, suitable for API output .
361 my ($self, $params) = @_;
363 return [ map { $_->to_api($params) } $self->as_list ];
366 =head3 attributes_from_api
368 my $attributes = $objects->attributes_from_api( $api_attributes );
370 Translates attributes from the API to DBIC
374 sub attributes_from_api {
375 my ( $self, $attributes ) = @_;
377 $self->{_singular_object} ||= $self->object_class->new();
378 return $self->{_singular_object}->attributes_from_api( $attributes );
381 =head3 from_api_mapping
383 my $mapped_attributes_hash = $objects->from_api_mapping;
385 Attributes map from the API to DBIC
389 sub from_api_mapping {
392 $self->{_singular_object} ||= $self->object_class->new();
393 return $self->{_singular_object}->from_api_mapping;
396 =head3 prefetch_whitelist
398 my $whitelist = $object->prefetch_whitelist()
400 Returns a hash of prefetchable subs and the type it returns
404 sub prefetch_whitelist {
407 $self->{_singular_object} ||= $self->object_class->new();
409 $self->{_singular_object}->prefetch_whitelist;
412 =head3 Koha::Objects->_wrap
414 wraps the DBIC object in a corresponding Koha object
419 my ( $self, @dbic_rows ) = @_;
421 my @objects = map { $self->object_class->_new_from_dbic( $_ ) } @dbic_rows;
426 =head3 Koha::Objects->_resultset
428 Returns the internal resultset or creates it if undefined
436 $self->{_resultset} ||=
437 Koha::Database->new()->schema()->resultset( $self->_type() );
439 return $self->{_resultset};
442 return Koha::Database->new()->schema()->resultset( $self->_type() );
446 sub _get_objects_class {
450 if( $type->can('koha_objects_class') ) {
451 return $type->koha_objects_class;
453 $type =~ s|Schema::Result::||;
459 my @columns = Koha::Objects->columns
461 Return the table columns
467 return Koha::Database->new->schema->resultset( $class->_type )->result_source->columns;
472 The autoload method is used call DBIx::Class method on a resultset.
474 Important: If you plan to use one of the DBIx::Class methods you must provide
475 relevant tests in t/db_dependent/Koha/Objects.t
476 Currently count, is_paged, pager, update, result_class, single and slice are covered.
481 my ( $self, @params ) = @_;
483 my @known_methods = qw( count is_paged pager update result_class single slice );
484 my $method = our $AUTOLOAD;
488 unless ( grep { $_ eq $method } @known_methods ) {
489 my $class = ref($self) ? ref($self) : $self;
490 Koha::Exceptions::Object::MethodNotCoveredByTests->throw(
491 error => sprintf("The method %s->%s is not covered by tests!", $class, $method),
496 my $r = eval { $self->_resultset->$method(@params) };
498 carp "No method $method found for " . ref($self) . " " . $@;
506 The _type method must be set for all child classes.
507 The value returned by it should be the DBIC resultset name.
508 For example, for holds, _type should return 'Reserve'.
516 This method must be set for all child classes.
517 The value returned by it should be the name of the Koha
518 object class that is returned by this class.
519 For example, for holds, object_class should return 'Koha::Hold'.
529 Kyle M Hall <kyle@bywatersolutions.com>