1 package DBIx::Class::Row;
6 use base qw/DBIx::Class/;
7 use Carp::Clan qw/^DBIx::Class/;
11 __PACKAGE__->mk_group_accessors('simple' => qw/_source_handle/);
15 DBIx::Class::Row - Basic row methods
21 This class is responsible for defining and doing basic operations on rows
22 derived from L<DBIx::Class::ResultSource> objects.
24 Row objects are returned from L<DBIx::Class::ResultSet>s using the
25 L<DBIx::Class::ResultSet/create>, L<DBIx::Class::ResultSet/find>,
26 L<DBIx::Class::ResultSet/next> and L<DBIx::Class::ResultSet/all> methods.
32 my $row = My::Class->new(\%attrs);
34 my $row = $schema->resultset('MySource')->new(\%colsandvalues);
38 =item Arguments: \%attrs or \%colsandvalues
40 =item Returns: A Row object
44 While you can create a new row object by calling C<new> directly on
45 this class, you are better off calling it on a
46 L<DBIx::Class::ResultSet> object.
48 When calling it directly, you will not get a complete, usable row
49 object until you pass or set the C<source_handle> attribute, to a
50 L<DBIx::Class::ResultSource> instance that is attached to a
51 L<DBIx::Class::Schema> with a valid connection.
53 C<$attrs> is a hashref of column name, value data. It can also contain
54 some other attributes such as the C<source_handle>.
56 Passing an object, or an arrayref of objects as a value will call
57 L<DBIx::Class::Relationship::Base/set_from_related> for you. When
58 passed a hashref or an arrayref of hashrefs as the value, these will
59 be turned into objects via new_related, and treated as if you had
62 For a more involved explanation, see L<DBIx::Class::ResultSet/create>.
66 ## It needs to store the new objects somewhere, and call insert on that list later when insert is called on this object. We may need an accessor for these so the user can retrieve them, if just doing ->new().
67 ## This only works because DBIC doesnt yet care to check whether the new_related objects have been passed all their mandatory columns
68 ## When doing the later insert, we need to make sure the PKs are set.
69 ## using _relationship_data in new and funky ways..
70 ## check Relationship::CascadeActions and Relationship::Accessor for compat
73 sub __new_related_find_or_new_helper {
74 my ($self, $relname, $data) = @_;
75 if ($self->__their_pk_needs_us($relname, $data)) {
76 return $self->result_source
77 ->related_source($relname)
81 if ($self->result_source->pk_depends_on($relname, $data)) {
82 return $self->result_source
83 ->related_source($relname)
85 ->find_or_create($data);
87 return $self->find_or_new_related($relname, $data);
90 sub __their_pk_needs_us { # this should maybe be in resultsource.
91 my ($self, $relname, $data) = @_;
92 my $source = $self->result_source;
93 my $reverse = $source->reverse_relationship_info($relname);
94 my $rel_source = $source->related_source($relname);
95 my $us = { $self->get_columns };
96 foreach my $key (keys %$reverse) {
97 # if their primary key depends on us, then we have to
98 # just create a result and we'll fill it out afterwards
99 return 1 if $rel_source->pk_depends_on($key, $us);
105 my ($class, $attrs) = @_;
106 $class = ref $class if ref $class;
113 if (my $handle = delete $attrs->{-source_handle}) {
114 $new->_source_handle($handle);
118 if ($source = delete $attrs->{-result_source}) {
119 $new->result_source($source);
123 $new->throw_exception("attrs must be a hashref")
124 unless ref($attrs) eq 'HASH';
126 my ($related,$inflated);
127 ## Pretend all the rels are actual objects, unset below if not, for insert() to fix
128 $new->{_rel_in_storage} = 1;
130 foreach my $key (keys %$attrs) {
131 if (ref $attrs->{$key}) {
132 ## Can we extract this lot to use with update(_or .. ) ?
133 confess "Can't do multi-create without result source" unless $source;
134 my $info = $source->relationship_info($key);
135 if ($info && $info->{attrs}{accessor}
136 && $info->{attrs}{accessor} eq 'single')
138 my $rel_obj = delete $attrs->{$key};
139 if(!Scalar::Util::blessed($rel_obj)) {
140 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
143 $new->{_rel_in_storage} = 0 unless ($rel_obj->in_storage);
145 $new->set_from_related($key, $rel_obj) if $rel_obj->in_storage;
146 $related->{$key} = $rel_obj;
148 } elsif ($info && $info->{attrs}{accessor}
149 && $info->{attrs}{accessor} eq 'multi'
150 && ref $attrs->{$key} eq 'ARRAY') {
151 my $others = delete $attrs->{$key};
152 foreach my $rel_obj (@$others) {
153 if(!Scalar::Util::blessed($rel_obj)) {
154 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
157 $new->{_rel_in_storage} = 0 unless ($rel_obj->in_storage);
158 $new->set_from_related($key, $rel_obj) if $rel_obj->in_storage;
160 $related->{$key} = $others;
162 } elsif ($info && $info->{attrs}{accessor}
163 && $info->{attrs}{accessor} eq 'filter')
165 ## 'filter' should disappear and get merged in with 'single' above!
166 my $rel_obj = delete $attrs->{$key};
167 if(!Scalar::Util::blessed($rel_obj)) {
168 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
170 $new->{_rel_in_storage} = 0 unless ($rel_obj->in_storage);
171 $inflated->{$key} = $rel_obj;
173 } elsif ($class->has_column($key)
174 && $class->column_info($key)->{_inflate_info}) {
175 $inflated->{$key} = $attrs->{$key};
179 $new->throw_exception("No such column $key on $class")
180 unless $class->has_column($key);
181 $new->store_column($key => $attrs->{$key});
184 $new->{_relationship_data} = $related if $related;
185 $new->{_inflated_column} = $inflated if $inflated;
197 =item Arguments: none
199 =item Returns: The Row object
203 Inserts an object previously created by L</new> into the database if
204 it isn't already in there. Returns the object itself. Requires the
205 object's result source to be set, or the class to have a
206 result_source_instance method. To insert an entirely new row into
207 the database, use C<create> (see L<DBIx::Class::ResultSet/create>).
209 To fetch an uninserted row object, call
210 L<new|DBIx::Class::ResultSet/new> on a resultset.
212 This will also insert any uninserted, related objects held inside this
213 one, see L<DBIx::Class::ResultSet/create> for more details.
219 return $self if $self->in_storage;
220 my $source = $self->result_source;
221 $source ||= $self->result_source($self->result_source_instance)
222 if $self->can('result_source_instance');
223 $self->throw_exception("No result_source set on this object; can't insert")
228 # Check if we stored uninserted relobjs here in new()
229 my %related_stuff = (%{$self->{_relationship_data} || {}},
230 %{$self->{_inflated_column} || {}});
232 if(!$self->{_rel_in_storage}) {
234 # The guard will save us if we blow out of this scope via die
235 $rollback_guard = $source->storage->txn_scope_guard;
237 ## Should all be in relationship_data, but we need to get rid of the
238 ## 'filter' reltype..
239 ## These are the FK rels, need their IDs for the insert.
241 my @pri = $self->primary_columns;
243 REL: foreach my $relname (keys %related_stuff) {
245 my $rel_obj = $related_stuff{$relname};
247 next REL unless (Scalar::Util::blessed($rel_obj)
248 && $rel_obj->isa('DBIx::Class::Row'));
250 next REL unless $source->pk_depends_on(
251 $relname, { $rel_obj->get_columns }
255 $self->set_from_related($relname, $rel_obj);
256 delete $related_stuff{$relname};
260 my $updated_cols = $source->storage->insert($source, { $self->get_columns });
261 $self->set_columns($updated_cols);
264 my @auto_pri = grep {
265 !defined $self->get_column($_) ||
266 ref($self->get_column($_)) eq 'SCALAR'
267 } $self->primary_columns;
270 #$self->throw_exception( "More than one possible key found for auto-inc on ".ref $self )
271 # if defined $too_many;
273 my $storage = $self->result_source->storage;
274 $self->throw_exception( "Missing primary key but Storage doesn't support last_insert_id" )
275 unless $storage->can('last_insert_id');
276 my @ids = $storage->last_insert_id($self->result_source,@auto_pri);
277 $self->throw_exception( "Can't get last insert id" )
278 unless (@ids == @auto_pri);
279 $self->store_column($auto_pri[$_] => $ids[$_]) for 0 .. $#ids;
282 $self->{_dirty_columns} = {};
283 $self->{related_resultsets} = {};
285 if(!$self->{_rel_in_storage}) {
286 ## Now do the has_many rels, that need $selfs ID.
287 foreach my $relname (keys %related_stuff) {
288 my $rel_obj = $related_stuff{$relname};
290 if (Scalar::Util::blessed($rel_obj)
291 && $rel_obj->isa('DBIx::Class::Row')) {
293 } elsif (ref $rel_obj eq 'ARRAY') {
297 my $reverse = $source->reverse_relationship_info($relname);
298 foreach my $obj (@cands) {
299 $obj->set_from_related($_, $self) for keys %$reverse;
300 my $them = { $obj->get_inflated_columns };
301 if ($self->__their_pk_needs_us($relname, $them)) {
302 $obj = $self->find_or_create_related($relname, $them);
309 $rollback_guard->commit;
312 $self->in_storage(1);
313 undef $self->{_orig_ident};
319 $row->in_storage; # Get value
320 $row->in_storage(1); # Set value
324 =item Arguments: none or 1|0
330 Indicates whether the object exists as a row in the database or
331 not. This is set to true when L<DBIx::Class::ResultSet/find>,
332 L<DBIx::Class::ResultSet/create> or L<DBIx::Class::ResultSet/insert>
335 Creating a row object using L<DBIx::Class::ResultSet/new>, or calling
336 L</delete> on one, sets it to false.
341 my ($self, $val) = @_;
342 $self->{_in_storage} = $val if @_ > 1;
343 return $self->{_in_storage};
348 $row->update(\%columns?)
352 =item Arguments: none or a hashref
354 =item Returns: The Row object
358 Throws an exception if the row object is not yet in the database,
359 according to L</in_storage>.
361 This method issues an SQL UPDATE query to commit any changes to the
362 object to the database if required.
364 Also takes an optional hashref of C<< column_name => value> >> pairs
365 to update on the object first. Be aware that the hashref will be
366 passed to C<set_inflated_columns>, which might edit it in place, so
367 don't rely on it being the same after a call to C<update>. If you
368 need to preserve the hashref, it is sufficient to pass a shallow copy
369 to C<update>, e.g. ( { %{ $href } } )
371 If the values passed or any of the column values set on the object
372 contain scalar references, eg:
374 $row->last_modified(\'NOW()');
376 $row->update({ last_modified => \'NOW()' });
378 The update will pass the values verbatim into SQL. (See
379 L<SQL::Abstract> docs). The values in your Row object will NOT change
380 as a result of the update call, if you want the object to be updated
381 with the actual values from the database, call L</discard_changes>
384 $row->update()->discard_changes();
386 To determine before calling this method, which column values have
387 changed and will be updated, call L</get_dirty_columns>.
389 To check if any columns will be updated, call L</is_changed>.
391 To force a column to be updated, call L</make_column_dirty> before
397 my ($self, $upd) = @_;
398 $self->throw_exception( "Not in database" ) unless $self->in_storage;
399 my $ident_cond = $self->ident_condition;
400 $self->throw_exception("Cannot safely update a row in a PK-less table")
401 if ! keys %$ident_cond;
403 $self->set_inflated_columns($upd) if $upd;
404 my %to_update = $self->get_dirty_columns;
405 return $self unless keys %to_update;
406 my $rows = $self->result_source->storage->update(
407 $self->result_source, \%to_update,
408 $self->{_orig_ident} || $ident_cond
411 $self->throw_exception( "Can't update ${self}: row not found" );
412 } elsif ($rows > 1) {
413 $self->throw_exception("Can't update ${self}: updated more than one row");
415 $self->{_dirty_columns} = {};
416 $self->{related_resultsets} = {};
417 undef $self->{_orig_ident};
427 =item Arguments: none
429 =item Returns: The Row object
433 Throws an exception if the object is not in the database according to
434 L</in_storage>. Runs an SQL DELETE statement using the primary key
435 values to locate the row.
437 The object is still perfectly usable, but L</in_storage> will
438 now return 0 and the object must reinserted using L</insert>
439 before it can be used to L</update> the row again.
441 If you delete an object in a class with a C<has_many> relationship, an
442 attempt is made to delete all the related objects as well. To turn
443 this behaviour off, pass C<< cascade_delete => 0 >> in the C<$attr>
444 hashref of the relationship, see L<DBIx::Class::Relationship>. Any
445 database-level cascade or restrict will take precedence over a
446 DBIx-Class-based cascading delete.
448 See also L<DBIx::Class::ResultSet/delete>.
455 $self->throw_exception( "Not in database" ) unless $self->in_storage;
456 my $ident_cond = $self->{_orig_ident} || $self->ident_condition;
457 $self->throw_exception("Cannot safely delete a row in a PK-less table")
458 if ! keys %$ident_cond;
459 foreach my $column (keys %$ident_cond) {
460 $self->throw_exception("Can't delete the object unless it has loaded the primary keys")
461 unless exists $self->{_column_data}{$column};
463 $self->result_source->storage->delete(
464 $self->result_source, $ident_cond);
465 $self->in_storage(undef);
467 $self->throw_exception("Can't do class delete without a ResultSource instance")
468 unless $self->can('result_source_instance');
469 my $attrs = @_ > 1 && ref $_[$#_] eq 'HASH' ? { %{pop(@_)} } : {};
470 my $query = ref $_[0] eq 'HASH' ? $_[0] : {@_};
471 $self->result_source_instance->resultset->search(@_)->delete;
478 my $val = $row->get_column($col);
482 =item Arguments: $columnname
484 =item Returns: The value of the column
488 Throws an exception if the column name given doesn't exist according
491 Returns a raw column value from the row object, if it has already
492 been fetched from the database or set by an accessor.
494 If an L<inflated value|DBIx::Class::InflateColumn> has been set, it
495 will be deflated and returned.
497 To retrieve all loaded column values as a hash, use L</get_columns>.
502 my ($self, $column) = @_;
503 $self->throw_exception( "Can't fetch data as class method" ) unless ref $self;
504 return $self->{_column_data}{$column} if exists $self->{_column_data}{$column};
505 if (exists $self->{_inflated_column}{$column}) {
506 return $self->store_column($column,
507 $self->_deflated_column($column, $self->{_inflated_column}{$column}));
509 $self->throw_exception( "No such column '${column}'" ) unless $self->has_column($column);
513 =head2 has_column_loaded
515 if ( $row->has_column_loaded($col) ) {
516 print "$col has been loaded from db";
521 =item Arguments: $columnname
527 Returns a true value if the column value has been loaded from the
528 database (or set locally).
532 sub has_column_loaded {
533 my ($self, $column) = @_;
534 $self->throw_exception( "Can't call has_column data as class method" ) unless ref $self;
535 return 1 if exists $self->{_inflated_column}{$column};
536 return exists $self->{_column_data}{$column};
541 my %data = $row->get_columns;
545 =item Arguments: none
547 =item Returns: A hash of columnname, value pairs.
551 Returns all loaded column data as a hash, containing raw values. To
552 get just one value for a particular column, use L</get_column>.
558 if (exists $self->{_inflated_column}) {
559 foreach my $col (keys %{$self->{_inflated_column}}) {
560 $self->store_column($col, $self->_deflated_column($col, $self->{_inflated_column}{$col}))
561 unless exists $self->{_column_data}{$col};
564 return %{$self->{_column_data}};
567 =head2 get_dirty_columns
569 my %data = $row->get_dirty_columns;
573 =item Arguments: none
575 =item Returns: A hash of column, value pairs
579 Only returns the column, value pairs for those columns that have been
580 changed on this object since the last L</update> or L</insert> call.
582 See L</get_columns> to fetch all column/value pairs.
586 sub get_dirty_columns {
588 return map { $_ => $self->{_column_data}{$_} }
589 keys %{$self->{_dirty_columns}};
592 =head2 make_column_dirty
594 $row->make_column_dirty($col)
598 =item Arguments: $columnname
600 =item Returns: undefined
604 Throws an exception if the column does not exist.
606 Marks a column as having been changed regardless of whether it has
610 sub make_column_dirty {
611 my ($self, $column) = @_;
613 $self->throw_exception( "No such column '${column}'" )
614 unless exists $self->{_column_data}{$column} || $self->has_column($column);
615 $self->{_dirty_columns}{$column} = 1;
618 =head2 get_inflated_columns
620 my %inflated_data = $obj->get_inflated_columns;
624 =item Arguments: none
626 =item Returns: A hash of column, object|value pairs
630 Returns a hash of all column keys and associated values. Values for any
631 columns set to use inflation will be inflated and returns as objects.
633 See L</get_columns> to get the uninflated values.
635 See L<DBIx::Class::InflateColumn> for how to setup inflation.
639 sub get_inflated_columns {
642 my $accessor = $self->column_info($_)->{'accessor'} || $_;
643 ($_ => $self->$accessor);
649 $row->set_column($col => $val);
653 =item Arguments: $columnname, $value
655 =item Returns: $value
659 Sets a raw column value. If the new value is different from the old one,
660 the column is marked as dirty for when you next call L</update>.
662 If passed an object or reference as a value, this will happily attempt
663 store it, and a later L</insert> or L</update> will try and
664 stringify/numify as appropriate. To set an object to be deflated
665 instead, see L</set_inflated_columns>.
670 my ($self, $column, $new_value) = @_;
672 $self->{_orig_ident} ||= $self->ident_condition;
673 my $old_value = $self->get_column($column);
675 $self->store_column($column, $new_value);
676 $self->{_dirty_columns}{$column} = 1
677 if (defined $old_value xor defined $new_value) || (defined $old_value && $old_value ne $new_value);
679 # XXX clear out the relation cache for this column
680 delete $self->{related_resultsets}{$column};
687 $row->set_columns({ $col => $val, ... });
691 =item Arguments: \%columndata
693 =item Returns: The Row object
697 Sets multiple column, raw value pairs at once.
699 Works as L</set_column>.
704 my ($self,$data) = @_;
705 foreach my $col (keys %$data) {
706 $self->set_column($col,$data->{$col});
711 =head2 set_inflated_columns
713 $row->set_inflated_columns({ $col => $val, $relname => $obj, ... });
717 =item Arguments: \%columndata
719 =item Returns: The Row object
723 Sets more than one column value at once. Any inflated values are
724 deflated and the raw values stored.
726 Any related values passed as Row objects, using the relation name as a
727 key, are reduced to the appropriate foreign key values and stored. If
728 instead of related row objects, a hashref of column, value data is
729 passed, will create the related object first then store.
731 Will even accept arrayrefs of data as a value to a
732 L<DBIx::Class::Relationship/has_many> key, and create the related
733 objects if necessary.
735 Be aware that the input hashref might be edited in place, so dont rely
736 on it being the same after a call to C<set_inflated_columns>. If you
737 need to preserve the hashref, it is sufficient to pass a shallow copy
738 to C<set_inflated_columns>, e.g. ( { %{ $href } } )
740 See also L<DBIx::Class::Relationship::Base/set_from_related>.
744 sub set_inflated_columns {
745 my ( $self, $upd ) = @_;
746 foreach my $key (keys %$upd) {
747 if (ref $upd->{$key}) {
748 my $info = $self->relationship_info($key);
749 if ($info && $info->{attrs}{accessor}
750 && $info->{attrs}{accessor} eq 'single')
752 my $rel = delete $upd->{$key};
753 $self->set_from_related($key => $rel);
754 $self->{_relationship_data}{$key} = $rel;
755 } elsif ($info && $info->{attrs}{accessor}
756 && $info->{attrs}{accessor} eq 'multi'
757 && ref $upd->{$key} eq 'ARRAY') {
758 my $others = delete $upd->{$key};
759 foreach my $rel_obj (@$others) {
760 if(!Scalar::Util::blessed($rel_obj)) {
761 $rel_obj = $self->create_related($key, $rel_obj);
764 $self->{_relationship_data}{$key} = $others;
765 # $related->{$key} = $others;
768 elsif ($self->has_column($key)
769 && exists $self->column_info($key)->{_inflate_info})
771 $self->set_inflated_column($key, delete $upd->{$key});
775 $self->set_columns($upd);
780 my $copy = $orig->copy({ change => $to, ... });
784 =item Arguments: \%replacementdata
786 =item Returns: The Row object copy
790 Inserts a new row into the database, as a copy of the original
791 object. If a hashref of replacement data is supplied, these will take
792 precedence over data in the original.
794 If the row has related objects in a
795 L<DBIx::Class::Relationship/has_many> then those objects may be copied
796 too depending on the L<cascade_copy|DBIx::Class::Relationship>
797 relationship attribute.
802 my ($self, $changes) = @_;
804 my $col_data = { %{$self->{_column_data}} };
805 foreach my $col (keys %$col_data) {
806 delete $col_data->{$col}
807 if $self->result_source->column_info($col)->{is_auto_increment};
810 my $new = { _column_data => $col_data };
811 bless $new, ref $self;
813 $new->result_source($self->result_source);
814 $new->set_inflated_columns($changes);
817 # Its possible we'll have 2 relations to the same Source. We need to make
818 # sure we don't try to insert the same row twice esle we'll violate unique
820 my $rels_copied = {};
822 foreach my $rel ($self->result_source->relationships) {
823 my $rel_info = $self->result_source->relationship_info($rel);
825 next unless $rel_info->{attrs}{cascade_copy};
827 my $resolved = $self->result_source->resolve_condition(
828 $rel_info->{cond}, $rel, $new
831 my $copied = $rels_copied->{ $rel_info->{source} } ||= {};
832 foreach my $related ($self->search_related($rel)) {
833 my $id_str = join("\0", $related->id);
834 next if $copied->{$id_str};
835 $copied->{$id_str} = 1;
836 my $rel_copy = $related->copy($resolved);
845 $row->store_column($col => $val);
849 =item Arguments: $columnname, $value
851 =item Returns: The value set
855 Set a raw value for a column without marking it as changed. This
856 method is used internally by L</set_column> which you should probably
859 This is the lowest level at which data is set on a row object,
860 extend this method to catch all data setting methods.
865 my ($self, $column, $value) = @_;
866 $self->throw_exception( "No such column '${column}'" )
867 unless exists $self->{_column_data}{$column} || $self->has_column($column);
868 $self->throw_exception( "set_column called for ${column} without value" )
870 return $self->{_column_data}{$column} = $value;
873 =head2 inflate_result
875 Class->inflate_result($result_source, \%me, \%prefetch?)
879 =item Arguments: $result_source, \%columndata, \%prefetcheddata
881 =item Returns: A Row object
885 All L<DBIx::Class::ResultSet> methods that retrieve data from the
886 database and turn it into row objects call this method.
888 Extend this method in your Result classes to hook into this process,
889 for example to rebless the result into a different class.
891 Reblessing can also be done more easily by setting C<result_class> in
892 your Result class. See L<DBIx::Class::ResultSource/result_class>.
897 my ($class, $source, $me, $prefetch) = @_;
899 my ($source_handle) = $source;
901 if ($source->isa('DBIx::Class::ResultSourceHandle')) {
902 $source = $source_handle->resolve
904 $source_handle = $source->handle
908 _source_handle => $source_handle,
912 bless $new, (ref $class || $class);
915 foreach my $pre (keys %{$prefetch||{}}) {
916 my $pre_val = $prefetch->{$pre};
917 my $pre_source = $source->related_source($pre);
918 $class->throw_exception("Can't prefetch non-existent relationship ${pre}")
920 if (ref($pre_val->[0]) eq 'ARRAY') { # multi
922 foreach my $pre_rec (@$pre_val) {
923 unless ($pre_source->primary_columns == grep { exists $pre_rec->[0]{$_}
924 and defined $pre_rec->[0]{$_} } $pre_source->primary_columns) {
927 push(@pre_objects, $pre_source->result_class->inflate_result(
928 $pre_source, @{$pre_rec}));
930 $new->related_resultset($pre)->set_cache(\@pre_objects);
931 } elsif (defined $pre_val->[0]) {
933 unless ($pre_source->primary_columns == grep { exists $pre_val->[0]{$_}
934 and !defined $pre_val->[0]{$_} } $pre_source->primary_columns)
936 $fetched = $pre_source->result_class->inflate_result(
937 $pre_source, @{$pre_val});
939 $new->related_resultset($pre)->set_cache([ $fetched ]);
940 my $accessor = $source->relationship_info($pre)->{attrs}{accessor};
941 $class->throw_exception("No accessor for prefetched $pre")
942 unless defined $accessor;
943 if ($accessor eq 'single') {
944 $new->{_relationship_data}{$pre} = $fetched;
945 } elsif ($accessor eq 'filter') {
946 $new->{_inflated_column}{$pre} = $fetched;
948 $class->throw_exception("Prefetch not supported with accessor '$accessor'");
955 =head2 update_or_insert
957 $row->update_or_insert
961 =item Arguments: none
963 =item Returns: Result of update or insert operation
967 L</Update>s the object if it's already in the database, according to
968 L</in_storage>, else L</insert>s it.
970 =head2 insert_or_update
972 $obj->insert_or_update
974 Alias for L</update_or_insert>
978 sub insert_or_update { shift->update_or_insert(@_) }
980 sub update_or_insert {
982 return ($self->in_storage ? $self->update : $self->insert);
987 my @changed_col_names = $row->is_changed();
988 if ($row->is_changed()) { ... }
992 =item Arguments: none
994 =item Returns: 0|1 or @columnnames
998 In list context returns a list of columns with uncommited changes, or
999 in scalar context returns a true value if there are uncommitted
1005 return keys %{shift->{_dirty_columns} || {}};
1008 =head2 is_column_changed
1010 if ($row->is_column_changed('col')) { ... }
1014 =item Arguments: $columname
1020 Returns a true value if the column has uncommitted changes.
1024 sub is_column_changed {
1025 my( $self, $col ) = @_;
1026 return exists $self->{_dirty_columns}->{$col};
1029 =head2 result_source
1031 my $resultsource = $row->result_source;
1035 =item Arguments: none
1037 =item Returns: a ResultSource instance
1041 Accessor to the L<DBIx::Class::ResultSource> this object was created from.
1049 $self->_source_handle($_[0]->handle);
1051 $self->_source_handle->resolve;
1055 =head2 register_column
1057 $column_info = { .... };
1058 $class->register_column($column_name, $column_info);
1062 =item Arguments: $columnname, \%columninfo
1064 =item Returns: undefined
1068 Registers a column on the class. If the column_info has an 'accessor'
1069 key, creates an accessor named after the value if defined; if there is
1070 no such key, creates an accessor with the same name as the column
1072 The column_info attributes are described in
1073 L<DBIx::Class::ResultSource/add_columns>
1077 sub register_column {
1078 my ($class, $col, $info) = @_;
1080 if (exists $info->{accessor}) {
1081 return unless defined $info->{accessor};
1082 $acc = [ $info->{accessor}, $col ];
1084 $class->mk_group_accessors('column' => $acc);
1087 =head2 get_from_storage
1089 my $copy = $row->get_from_storage($attrs)
1093 =item Arguments: \%attrs
1095 =item Returns: A Row object
1099 Fetches a fresh copy of the Row object from the database and returns it.
1101 If passed the \%attrs argument, will first apply these attributes to
1102 the resultset used to find the row.
1104 This copy can then be used to compare to an existing row object, to
1105 determine if any changes have been made in the database since it was
1108 To just update your Row object with any latest changes from the
1109 database, use L</discard_changes> instead.
1111 The \%attrs argument should be compatible with
1112 L<DBIx::Class::ResultSet/ATTRIBUTES>.
1116 sub get_from_storage {
1117 my $self = shift @_;
1118 my $attrs = shift @_;
1119 my $resultset = $self->result_source->resultset;
1121 if(defined $attrs) {
1122 $resultset = $resultset->search(undef, $attrs);
1125 return $resultset->find($self->{_orig_ident} || $self->ident_condition);
1128 =head2 throw_exception
1130 See L<DBIx::Class::Schema/throw_exception>.
1134 sub throw_exception {
1136 if (ref $self && ref $self->result_source && $self->result_source->schema) {
1137 $self->result_source->schema->throw_exception(@_);
1149 =item Arguments: none
1151 =item Returns: A list of primary key values
1155 Returns the primary key(s) for a row. Can't be called as a class method.
1156 Actually implemented in L<DBIx::Class::PK>
1158 =head2 discard_changes
1160 $row->discard_changes
1164 =item Arguments: none
1166 =item Returns: nothing (updates object in-place)
1170 Retrieves and sets the row object data from the database, losing any
1173 This method can also be used to refresh from storage, retrieving any
1174 changes made since the row was last read from storage. Actually
1175 implemented in L<DBIx::Class::PK>
1183 Matt S. Trout <mst@shadowcatsystems.co.uk>
1187 You may distribute this code under the same terms as Perl itself.