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 Similar to DBIx::Class::ResultSet->find this method accepts:
74 \%columns_values | @pk_values, { key => $unique_constraint, %attrs }?
75 Strictly speaking, columns_values should only refer to columns under an
78 my $object = Koha::Objects->find( { col1 => $val1, col2 => $val2 } );
79 my $object = Koha::Objects->find( $id );
80 my $object = Koha::Objects->find( $idpart1, $idpart2, $attrs ); # composite PK
85 my ( $self, @pars ) = @_;
87 croak 'Cannot use "->find" in list context' if wantarray;
91 my $result = $self->_resultset()->find( @pars );
93 return unless $result;
95 my $object = $self->object_class()->_new_from_dbic( $result );
100 =head3 Koha::Objects->find_or_create();
102 my $object = Koha::Objects->find_or_create( $attrs );
107 my ( $self, $params ) = @_;
109 my $result = $self->_resultset->find_or_create($params);
111 return unless $result;
113 my $object = $self->object_class->_new_from_dbic($result);
118 =head3 Koha::Objects->search();
120 my @objects = Koha::Objects->search($params);
125 my ( $self, $params, $attributes ) = @_;
128 my @dbic_rows = $self->_resultset()->search($params, $attributes);
130 return $self->_wrap(@dbic_rows);
134 my $class = ref($self) ? ref($self) : $self;
135 my $rs = $self->_resultset()->search($params, $attributes);
137 return $class->_new_from_dbic($rs);
141 =head3 search_related
143 my @objects = Koha::Objects->search_related( $rel_name, $cond?, \%attrs? );
144 my $objects = Koha::Objects->search_related( $rel_name, $cond?, \%attrs? );
146 Searches the specified relationship, optionally specifying a condition and attributes for matching records.
151 my ( $self, $rel_name, @params ) = @_;
153 return if !$rel_name;
155 my @dbic_rows = $self->_resultset()->search_related($rel_name, @params);
156 return if !@dbic_rows;
157 my $object_class = _get_objects_class( $dbic_rows[0]->result_class );
159 eval "require $object_class";
160 return _wrap( $object_class, @dbic_rows );
163 my $rs = $self->_resultset()->search_related($rel_name, @params);
165 my $object_class = _get_objects_class( $rs->result_class );
167 eval "require $object_class";
168 return _new_from_dbic( $object_class, $rs );
174 my $object = Koha::Objects->search({}, { rows => 1 })->single
176 Returns one and only one object that is part of this set.
177 Returns undef if there are no objects found.
179 This is optimal as it will grab the first returned result without instantiating
183 http://search.cpan.org/dist/DBIx-Class/lib/DBIx/Class/Manual/Cookbook.pod#Retrieve_one_and_only_one_row_from_a_resultset
190 my $single = $self->_resultset()->single;
191 return unless $single;
193 return $self->object_class()->_new_from_dbic($single);
196 =head3 Koha::Objects->next();
198 my $object = Koha::Objects->next();
200 Returns the next object that is part of this set.
201 Returns undef if there are no more objects to return.
208 my $result = $self->_resultset()->next();
209 return unless $result;
211 my $object = $self->object_class()->_new_from_dbic( $result );
216 =head3 Koha::Objects->last;
218 my $object = Koha::Objects->last;
220 Returns the last object that is part of this set.
221 Returns undef if there are no object to return.
228 my $count = $self->_resultset->count;
229 return unless $count;
231 my ( $result ) = $self->_resultset->slice($count - 1, $count - 1);
233 my $object = $self->object_class()->_new_from_dbic( $result );
240 =head3 Koha::Objects->reset();
242 Koha::Objects->reset();
244 resets iteration so the next call to next() will start agein
245 with the first object in a set.
252 $self->_resultset()->reset();
257 =head3 Koha::Objects->as_list();
259 Koha::Objects->as_list();
261 Returns an arrayref of the objects in this set.
268 my @dbic_rows = $self->_resultset()->all();
270 my @objects = $self->_wrap(@dbic_rows);
272 return wantarray ? @objects : \@objects;
275 =head3 Koha::Objects->unblessed
277 Returns an unblessed representation of objects.
284 return [ map { $_->unblessed } $self->as_list ];
287 =head3 Koha::Objects->get_column
289 Return all the values of this set for a given column
294 my ($self, $column_name) = @_;
295 return $self->_resultset->get_column( $column_name )->all;
298 =head3 Koha::Objects->TO_JSON
300 Returns an unblessed representation of objects, suitable for JSON output.
307 return [ map { $_->TO_JSON } $self->as_list ];
310 =head3 Koha::Objects->_wrap
312 wraps the DBIC object in a corresponding Koha object
317 my ( $self, @dbic_rows ) = @_;
319 my @objects = map { $self->object_class->_new_from_dbic( $_ ) } @dbic_rows;
324 =head3 Koha::Objects->_resultset
326 Returns the internal resultset or creates it if undefined
334 $self->{_resultset} ||=
335 Koha::Database->new()->schema()->resultset( $self->_type() );
337 return $self->{_resultset};
340 return Koha::Database->new()->schema()->resultset( $self->_type() );
344 sub _get_objects_class {
348 if( $type->can('koha_objects_class') ) {
349 return $type->koha_objects_class;
351 $type =~ s|Schema::Result::||;
357 my @columns = Koha::Objects->columns
359 Return the table columns
365 return Koha::Database->new->schema->resultset( $class->_type )->result_source->columns;
370 The autoload method is used call DBIx::Class method on a resultset.
372 Important: If you plan to use one of the DBIx::Class methods you must provide
373 relevant tests in t/db_dependent/Koha/Objects.t
374 Currently count, pager, update and delete are covered.
379 my ( $self, @params ) = @_;
381 my @known_methods = qw( count pager update delete result_class single slice );
382 my $method = our $AUTOLOAD;
385 carp "The method $method is not covered by tests" and return unless grep {/^$method$/} @known_methods;
386 my $r = eval { $self->_resultset->$method(@params) };
388 carp "No method $method found for " . ref($self) . " " . $@;
396 The _type method must be set for all child classes.
397 The value returned by it should be the DBIC resultset name.
398 For example, for holds, _type should return 'Reserve'.
406 This method must be set for all child classes.
407 The value returned by it should be the name of the Koha
408 object class that is returned by this class.
409 For example, for holds, object_class should return 'Koha::Hold'.
419 Kyle M Hall <kyle@bywatersolutions.com>