3 # Copyright ByWater Solutions 2014
4 # Copyright 2016 Koha Development Team
6 # This file is part of Koha.
8 # Koha is free software; you can redistribute it and/or modify it
9 # under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 3 of the License, or
11 # (at your option) any later version.
13 # Koha is distributed in the hope that it will be useful, but
14 # WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with Koha; if not, see <http://www.gnu.org/licenses>.
25 use Scalar::Util qw( blessed looks_like_number );
26 use Try::Tiny qw( catch try );
27 use List::MoreUtils qw( any );
30 use Koha::Exceptions::Object;
31 use Koha::DateUtils qw( dt_from_string output_pref );
32 use Koha::Object::Message;
36 Koha::Object - Koha Object base class
41 my $object = Koha::Object->new({ property1 => $property1, property2 => $property2, etc... } );
45 This class must always be subclassed.
53 =head3 Koha::Object->new();
55 my $object = Koha::Object->new();
56 my $object = Koha::Object->new($attributes);
58 Note that this cannot be used to retrieve record from the DB.
63 my ( $class, $attributes ) = @_;
67 my $schema = Koha::Database->new->schema;
69 # Remove the arguments which exist, are not defined but NOT NULL to use the default value
70 my $columns_info = $schema->resultset( $class->_type )->result_source->columns_info;
71 for my $column_name ( keys %$attributes ) {
72 my $c_info = $columns_info->{$column_name};
73 next if $c_info->{is_nullable};
74 next if not exists $attributes->{$column_name} or defined $attributes->{$column_name};
75 delete $attributes->{$column_name};
79 $schema->resultset( $class->_type() )->new($attributes);
82 $self->{_messages} = [];
84 croak("No _type found! Koha::Object must be subclassed!")
85 unless $class->_type();
87 bless( $self, $class );
91 =head3 Koha::Object->_new_from_dbic();
93 my $object = Koha::Object->_new_from_dbic($dbic_row);
98 my ( $class, $dbic_row ) = @_;
102 $self->{_result} = $dbic_row;
104 croak("No _type found! Koha::Object must be subclassed!")
105 unless $class->_type();
107 croak( "DBIC result _type " . ref( $self->{_result} ) . " isn't of the _type " . $class->_type() )
108 unless ref( $self->{_result} ) eq "Koha::Schema::Result::" . $class->_type();
110 bless( $self, $class );
114 =head3 $object->store();
116 Saves the object in storage.
117 If the object is new, it will be created.
118 If the object previously existed, it will be updated.
121 $self if the store was a success
122 undef if the store failed
129 my $columns_info = $self->_result->result_source->columns_info;
131 # Handle not null and default values for integers and dates
132 foreach my $col ( keys %{$columns_info} ) {
134 if ( _numeric_column_type( $columns_info->{$col}->{data_type} )
135 or _decimal_column_type( $columns_info->{$col}->{data_type} )
137 # Has been passed but not a number, usually an empty string
138 my $value = $self->_result()->get_column($col);
139 if ( defined $value and not looks_like_number( $value ) ) {
140 if ( $columns_info->{$col}->{is_nullable} ) {
141 # If nullable, default to null
142 $self->_result()->set_column($col => undef);
144 # If cannot be null, get the default value
145 # What if cannot be null and does not have a default value? Possible?
146 $self->_result()->set_column($col => $columns_info->{$col}->{default_value});
150 elsif ( _date_or_datetime_column_type( $columns_info->{$col}->{data_type} ) ) {
151 # Set to null if an empty string (or == 0 but should not happen)
152 my $value = $self->_result()->get_column($col);
153 if ( defined $value and not $value ) {
154 if ( $columns_info->{$col}->{is_nullable} ) {
155 $self->_result()->set_column($col => undef);
157 $self->_result()->set_column($col => $columns_info->{$col}->{default_value});
160 elsif ( not defined $self->$col
161 && $columns_info->{$col}->{datetime_undef_if_invalid} )
164 $self->_result()->set_column($col => $columns_info->{$col}->{default_value});
170 return $self->_result()->update_or_insert() ? $self : undef;
173 # Catch problems and raise relevant exceptions
174 if (ref($_) eq 'DBIx::Class::Exception') {
176 if ( $_->{msg} =~ /Cannot add or update a child row: a foreign key constraint fails/ ) {
178 # FIXME: MySQL error, if we support more DB engines we should implement this for each
179 if ( $_->{msg} =~ /FOREIGN KEY \(`(?<column>.*?)`\)/ ) {
180 Koha::Exceptions::Object::FKConstraint->throw(
181 error => 'Broken FK constraint',
182 broken_fk => $+{column}
186 elsif( $_->{msg} =~ /Duplicate entry '(.*?)' for key '(?<key>.*?)'/ ) {
187 Koha::Exceptions::Object::DuplicateID->throw(
188 error => 'Duplicate ID',
189 duplicate_id => $+{key}
192 elsif( $_->{msg} =~ /Incorrect (?<type>\w+) value: '(?<value>.*)' for column \W?(?<property>\S+)/ ) { # The optional \W in the regex might be a quote or backtick
194 my $value = $+{value};
195 my $property = $+{property};
196 $property =~ s/['`]//g;
197 Koha::Exceptions::Object::BadValue->throw(
200 property => $property =~ /(\w+\.\w+)$/ ? $1 : $property, # results in table.column without quotes or backtics
204 # Catch-all for foreign key breakages. It will help find other use cases
209 =head3 $object->update();
211 A shortcut for set + store in one call.
216 my ($self, $values) = @_;
217 Koha::Exceptions::Object::NotInStorage->throw unless $self->in_storage;
218 $self->set($values)->store();
221 =head3 $object->delete();
223 Removes the object from storage.
226 The item object if deletion was a success
227 The DBIX::Class error if deletion failed
234 my $deleted = $self->_result()->delete;
235 if ( ref $deleted ) {
236 my $object_class = Koha::Object::_get_object_class( $self->_result->result_class );
237 $deleted = $object_class->_new_from_dbic($deleted);
242 =head3 $object->set( $properties_hashref )
246 property1 => $property1,
247 property2 => $property2,
248 property3 => $propery3,
252 Enables multiple properties to be set at once
255 1 if all properties were set.
256 0 if one or more properties do not exist.
257 undef if all properties exist but a different error
258 prevents one or more properties from being set.
260 If one or more of the properties do not exist,
261 no properties will be set.
266 my ( $self, $properties ) = @_;
268 my @columns = @{$self->_columns()};
270 foreach my $p ( keys %$properties ) {
271 unless ( grep { $_ eq $p } @columns ) {
272 Koha::Exceptions::Object::PropertyNotFound->throw( "No property $p for " . ref($self) );
276 return $self->_result()->set_columns($properties) ? $self : undef;
279 =head3 $object->set_or_blank( $properties_hashref )
281 $object->set_or_blank(
283 property1 => $property1,
284 property2 => $property2,
285 property3 => $propery3,
289 If not listed in $properties_hashref, the property will be set to the default
290 value defined at DB level, or nulled.
296 my ( $self, $properties ) = @_;
298 my $columns_info = $self->_result->result_source->columns_info;
300 foreach my $col ( keys %{$columns_info} ) {
302 next if exists $properties->{$col};
304 if ( $columns_info->{$col}->{is_nullable} ) {
305 $properties->{$col} = undef;
307 $properties->{$col} = $columns_info->{$col}->{default_value};
311 return $self->set($properties);
314 =head3 $object->unblessed();
316 Returns an unblessed representation of object.
323 return { $self->_result->get_columns };
326 =head3 $object->get_from_storage;
330 sub get_from_storage {
331 my ( $self, $attrs ) = @_;
332 my $stored_object = $self->_result->get_from_storage($attrs);
333 return unless $stored_object;
334 my $object_class = Koha::Object::_get_object_class( $self->_result->result_class );
335 return $object_class->_new_from_dbic($stored_object);
338 =head3 $object->messages
340 my @messages = @{ $object->messages };
342 Returns the (probably non-fatal) messages that were recorded on the object.
349 $self->{_messages} = []
350 unless defined $self->{_messages};
352 return $self->{_messages};
355 =head3 $object->add_message
358 <some action that might fail>
361 if ( <fatal condition> ) {
362 Koha::Exception->throw...
365 # This is a non fatal error, notify the caller
366 $self->add_message({ message => $error, type => 'error' });
375 my ( $self, $params ) = @_;
377 push @{ $self->{_messages} }, Koha::Object::Message->new($params);
382 =head3 $object->TO_JSON
384 Returns an unblessed representation of the object, suitable for JSON output.
392 my $unblessed = $self->unblessed;
393 my $columns_info = Koha::Database->new->schema->resultset( $self->_type )
394 ->result_source->{_columns};
396 foreach my $col ( keys %{$columns_info} ) {
398 if ( $columns_info->{$col}->{is_boolean} )
399 { # Handle booleans gracefully
401 = ( $unblessed->{$col} )
405 elsif ( _numeric_column_type( $columns_info->{$col}->{data_type} )
406 and looks_like_number( $unblessed->{$col} )
409 # TODO: Remove once the solution for
410 # https://github.com/perl5-dbi/DBD-mysql/issues/212
411 # is ported to whatever distro we support by that time
412 # or we move to DBD::MariaDB
413 $unblessed->{$col} += 0;
415 elsif ( _decimal_column_type( $columns_info->{$col}->{data_type} )
416 and looks_like_number( $unblessed->{$col} )
419 # TODO: Remove once the solution for
420 # https://github.com/perl5-dbi/DBD-mysql/issues/212
421 # is ported to whatever distro we support by that time
422 # or we move to DBD::MariaDB
423 $unblessed->{$col} += 0.00;
425 elsif ( _datetime_column_type( $columns_info->{$col}->{data_type} ) ) {
427 return unless $unblessed->{$col};
428 $unblessed->{$col} = output_pref({
429 dateformat => 'rfc3339',
430 dt => dt_from_string($unblessed->{$col}, 'sql'),
438 sub _date_or_datetime_column_type {
439 my ($column_type) = @_;
447 return ( grep { $column_type eq $_ } @dt_types) ? 1 : 0;
449 sub _datetime_column_type {
450 my ($column_type) = @_;
457 return ( grep { $column_type eq $_ } @dt_types) ? 1 : 0;
460 sub _numeric_column_type {
461 # TODO: Remove once the solution for
462 # https://github.com/perl5-dbi/DBD-mysql/issues/212
463 # is ported to whatever distro we support by that time
464 # or we move to DBD::MariaDB
465 my ($column_type) = @_;
467 my @numeric_types = (
476 return ( grep { $column_type eq $_ } @numeric_types) ? 1 : 0;
479 sub _decimal_column_type {
480 # TODO: Remove once the solution for
481 # https://github.com/perl5-dbi/DBD-mysql/issues/212
482 # is ported to whatever distro we support by that time
483 # or we move to DBD::MariaDB
484 my ($column_type) = @_;
486 my @decimal_types = (
492 return ( grep { $column_type eq $_ } @decimal_types) ? 1 : 0;
495 =head3 prefetch_whitelist
497 my $whitelist = $object->prefetch_whitelist()
499 Returns a hash of prefetchable subs and the type they return.
503 sub prefetch_whitelist {
507 my $relations = $self->_result->result_source->_relationships;
509 foreach my $key (keys %{$relations}) {
510 if($self->can($key)) {
511 my $result_class = $relations->{$key}->{class};
512 my $obj = $result_class->new;
514 $whitelist->{$key} = Koha::Object::_get_object_class( $obj->result_class );
516 $whitelist->{$key} = undef;
526 my $object_for_api = $object->to_api(
548 Returns a representation of the object, suitable for API output.
553 my ( $self, $params ) = @_;
554 my $json_object = $self->TO_JSON;
556 # Remove forbidden attributes if required
557 if ( $params->{public} ) {
558 for my $field ( keys %{$json_object} ) {
559 delete $json_object->{$field} unless any { $_ eq $field } @{ $self->public_read_list };
563 my $to_api_mapping = $self->to_api_mapping;
565 # Rename attributes if there's a mapping
566 if ( $self->can('to_api_mapping') ) {
567 foreach my $column ( keys %{ $self->to_api_mapping } ) {
568 my $mapped_column = $self->to_api_mapping->{$column};
569 if ( exists $json_object->{$column}
570 && defined $mapped_column )
573 $json_object->{$mapped_column} = delete $json_object->{$column};
575 elsif ( exists $json_object->{$column}
576 && !defined $mapped_column )
579 delete $json_object->{$column};
584 # Make sure we duplicate the $params variable to avoid
585 # breaking calls in a loop (Koha::Objects->to_api)
586 $params = {%$params};
587 my $embeds = delete $params->{embed};
590 foreach my $embed ( keys %{$embeds} ) {
591 if ( $embed =~ m/^(?<relation>.*)_count$/
592 and $embeds->{$embed}->{is_count} ) {
594 my $relation = $+{relation};
595 $json_object->{$embed} = $self->$relation->count;
599 my $next = $embeds->{$curr}->{children};
601 my $children = $self->$curr;
603 if ( defined $children and ref($children) eq 'ARRAY' ) {
605 $self->_handle_to_api_child(
614 $json_object->{$curr} = \@list;
617 $json_object->{$curr} = $self->_handle_to_api_child(
633 =head3 to_api_mapping
635 my $mapping = $object->to_api_mapping;
637 Generic method that returns the attribute name mappings required to
638 render the object on the API.
640 Note: this only returns an empty I<hashref>. Each class should have its
641 own mapping returned.
649 =head3 public_read_list
652 my @public_read_list = @{$object->public_read_list};
654 Generic method that returns the list of database columns that are allowed to
655 be passed to render objects on the public API.
657 Note: this only returns an empty I<arrayref>. Each class should have its
667 =head3 from_api_mapping
669 my $mapping = $object->from_api_mapping;
671 Generic method that returns the attribute name mappings so the data that
672 comes from the API is correctly renamed to match what is required for the DB.
676 sub from_api_mapping {
679 my $to_api_mapping = $self->to_api_mapping;
681 unless ( defined $self->{_from_api_mapping} ) {
682 $self->{_from_api_mapping} = {};
683 while (my ($key, $value) = each %{ $to_api_mapping } ) {
684 $self->{_from_api_mapping}->{$value} = $key
689 return $self->{_from_api_mapping};
694 my $object = Koha::Object->new_from_api;
695 my $object = Koha::Object->new_from_api( $attrs );
697 Creates a new object, mapping the API attribute names to the ones on the DB schema.
702 my ( $class, $params ) = @_;
704 my $self = $class->new;
705 return $self->set_from_api( $params );
710 my $object = Koha::Object->new(...);
711 $object->set_from_api( $attrs )
713 Sets the object's attributes mapping API attribute names to the ones on the DB schema.
718 my ( $self, $from_api_params ) = @_;
720 return $self->set( $self->attributes_from_api( $from_api_params ) );
723 =head3 attributes_from_api
725 my $attributes = attributes_from_api( $params );
727 Returns the passed params, converted from API naming into the model.
731 sub attributes_from_api {
732 my ( $self, $from_api_params ) = @_;
734 my $from_api_mapping = $self->from_api_mapping;
737 my $columns_info = $self->_result->result_source->columns_info;
738 my $dtf = $self->_result->result_source->storage->datetime_parser;
740 while (my ($key, $value) = each %{ $from_api_params } ) {
741 my $koha_field_name =
742 exists $from_api_mapping->{$key}
743 ? $from_api_mapping->{$key}
746 if ( $columns_info->{$koha_field_name}->{is_boolean} ) {
747 # TODO: Remove when D8 is formally deprecated
748 # Handle booleans gracefully
749 $value = ( $value ) ? 1 : 0;
751 elsif ( _date_or_datetime_column_type( $columns_info->{$koha_field_name}->{data_type} ) ) {
753 if ( $columns_info->{$koha_field_name}->{data_type} eq 'date' ) {
754 $value = $dtf->format_date(dt_from_string($value, 'rfc3339'))
758 $value = $dtf->format_datetime(dt_from_string($value, 'rfc3339'))
763 Koha::Exceptions::BadParameter->throw( parameter => $key );
767 $params->{$koha_field_name} = $value;
773 =head3 $object->unblessed_all_relateds
775 my $everything_into_one_hashref = $object->unblessed_all_relateds
777 The unblessed method only retrieves column' values for the column of the object.
778 In a *few* cases we want to retrieve the information of all the prefetched data.
782 sub unblessed_all_relateds {
786 my $related_resultsets = $self->_result->{related_resultsets} || {};
787 my $rs = $self->_result;
788 while ( $related_resultsets and %$related_resultsets ) {
789 my @relations = keys %{ $related_resultsets };
791 my $relation = $relations[0];
792 $rs = $rs->related_resultset($relation)->get_cache;
793 $rs = $rs->[0]; # Does it makes sense to have several values here?
794 my $object_class = Koha::Object::_get_object_class( $rs->result_class );
795 my $koha_object = $object_class->_new_from_dbic( $rs );
796 $related_resultsets = $rs->{related_resultsets};
797 %data = ( %data, %{ $koha_object->unblessed } );
800 %data = ( %data, %{ $self->unblessed } );
804 =head3 $object->_result();
806 Returns the internal DBIC Row object
813 # If we don't have a dbic row at this point, we need to create an empty one
815 Koha::Database->new()->schema()->resultset( $self->_type() )->new({});
817 return $self->{_result};
820 =head3 $object->_columns();
822 Returns an arrayref of the table columns
829 # If we don't have a dbic row at this point, we need to create an empty one
830 $self->{_columns} ||= [ $self->_result()->result_source()->columns() ];
832 return $self->{_columns};
835 sub _get_object_class {
839 if( $type->can('koha_object_class') ) {
840 return $type->koha_object_class;
842 $type =~ s|Schema::Result::||;
848 The autoload method is used only to get and set values for an objects properties.
855 my $method = our $AUTOLOAD;
858 my @columns = @{$self->_columns()};
859 # Using direct setter/getter like $item->barcode() or $item->barcode($barcode);
860 if ( grep { $_ eq $method } @columns ) {
862 $self->_result()->set_column( $method, @_ );
865 my $value = $self->_result()->get_column( $method );
870 my @known_methods = qw( is_changed id in_storage get_column discard_changes make_column_dirty );
872 Koha::Exceptions::Object::MethodNotCoveredByTests->throw(
873 error => sprintf("The method %s->%s is not covered by tests!", ref($self), $method),
875 ) unless grep { $_ eq $method } @known_methods;
878 my $r = eval { $self->_result->$method(@_) };
880 Koha::Exceptions::Object->throw( ref($self) . "::$method generated this error: " . $@ );
887 This method must be defined in the child class. The value is the name of the DBIC resultset.
888 For example, for borrowers, the _type method will return "Borrower".
894 =head3 _handle_to_api_child
898 sub _handle_to_api_child {
899 my ($self, $args ) = @_;
901 my $child = $args->{child};
902 my $next = $args->{next};
903 my $curr = $args->{curr};
904 my $params = $args->{params};
908 if ( defined $child ) {
910 Koha::Exceptions::Exception->throw( "Asked to embed $curr but its return value doesn't implement to_api" )
911 if defined $next and blessed $child and !$child->can('to_api');
913 if ( blessed $child ) {
914 $params->{embed} = $next;
915 $res = $child->to_api($params);
929 Kyle M Hall <kyle@bywatersolutions.com>
931 Jonathan Druart <jonathan.druart@bugs.koha-community.org>