1 package DBIx::Class::Row;
6 use base qw/DBIx::Class/;
7 use Carp::Clan qw/^DBIx::Class/;
17 $ENV{DBIC_MULTICREATE_DEBUG}
22 __PACKAGE__->mk_group_accessors('simple' => qw/_source_handle/);
26 DBIx::Class::Row - Basic row methods
32 This class is responsible for defining and doing basic operations on rows
33 derived from L<DBIx::Class::ResultSource> objects.
35 Row objects are returned from L<DBIx::Class::ResultSet>s using the
36 L<create|DBIx::Class::ResultSet/create>, L<find|DBIx::Class::ResultSet/find>,
37 L<next|DBIx::Class::ResultSet/next> and L<all|DBIx::Class::ResultSet/all> methods,
38 as well as invocations of 'single' (
39 L<belongs_to|DBIx::Class::Relationship/belongs_to>,
40 L<has_one|DBIx::Class::Relationship/has_one> or
41 L<might_have|DBIx::Class::Relationship/might_have>)
42 relationship accessors of L<DBIx::Class::Row> objects.
48 my $row = My::Class->new(\%attrs);
50 my $row = $schema->resultset('MySource')->new(\%colsandvalues);
54 =item Arguments: \%attrs or \%colsandvalues
56 =item Returns: A Row object
60 While you can create a new row object by calling C<new> directly on
61 this class, you are better off calling it on a
62 L<DBIx::Class::ResultSet> object.
64 When calling it directly, you will not get a complete, usable row
65 object until you pass or set the C<source_handle> attribute, to a
66 L<DBIx::Class::ResultSource> instance that is attached to a
67 L<DBIx::Class::Schema> with a valid connection.
69 C<$attrs> is a hashref of column name, value data. It can also contain
70 some other attributes such as the C<source_handle>.
72 Passing an object, or an arrayref of objects as a value will call
73 L<DBIx::Class::Relationship::Base/set_from_related> for you. When
74 passed a hashref or an arrayref of hashrefs as the value, these will
75 be turned into objects via new_related, and treated as if you had
78 Please note that if a value is not passed to new, DBIC will have no knowledge
79 of the value unless the value is reloaded, creating the possibility of the row
80 object differing from the database value if column defaults are used. To avoid
81 this issue you can either pass an explicit undef for nullable columns with a
82 NULL as default, or simply call L</discard_changes> on the row object after
85 For a more involved explanation, see L<DBIx::Class::ResultSet/create>.
89 ## 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().
90 ## This only works because DBIC doesnt yet care to check whether the new_related objects have been passed all their mandatory columns
91 ## When doing the later insert, we need to make sure the PKs are set.
92 ## using _relationship_data in new and funky ways..
93 ## check Relationship::CascadeActions and Relationship::Accessor for compat
96 sub __new_related_find_or_new_helper {
97 my ($self, $relname, $data) = @_;
98 if ($self->__their_pk_needs_us($relname, $data)) {
99 MULTICREATE_DEBUG and warn "MC $self constructing $relname via new_result";
100 return $self->result_source
101 ->related_source($relname)
105 if ($self->result_source->pk_depends_on($relname, $data)) {
106 MULTICREATE_DEBUG and warn "MC $self constructing $relname via find_or_new";
107 return $self->result_source
108 ->related_source($relname)
110 ->find_or_new($data);
112 MULTICREATE_DEBUG and warn "MC $self constructing $relname via find_or_new_related";
113 return $self->find_or_new_related($relname, $data);
116 sub __their_pk_needs_us { # this should maybe be in resultsource.
117 my ($self, $relname, $data) = @_;
118 my $source = $self->result_source;
119 my $reverse = $source->reverse_relationship_info($relname);
120 my $rel_source = $source->related_source($relname);
121 my $us = { $self->get_columns };
122 foreach my $key (keys %$reverse) {
123 # if their primary key depends on us, then we have to
124 # just create a result and we'll fill it out afterwards
125 return 1 if $rel_source->pk_depends_on($key, $us);
131 my ($class, $attrs) = @_;
132 $class = ref $class if ref $class;
139 if (my $handle = delete $attrs->{-source_handle}) {
140 $new->_source_handle($handle);
144 if ($source = delete $attrs->{-result_source}) {
145 $new->result_source($source);
148 if (my $related = delete $attrs->{-from_resultset}) {
149 @{$new->{_ignore_at_insert}={}}{@$related} = ();
153 $new->throw_exception("attrs must be a hashref")
154 unless ref($attrs) eq 'HASH';
156 my ($related,$inflated);
157 ## Pretend all the rels are actual objects, unset below if not, for insert() to fix
158 $new->{_rel_in_storage} = 1;
160 foreach my $key (keys %$attrs) {
161 if (ref $attrs->{$key}) {
162 ## Can we extract this lot to use with update(_or .. ) ?
163 confess "Can't do multi-create without result source" unless $source;
164 my $info = $source->relationship_info($key);
165 if ($info && $info->{attrs}{accessor}
166 && $info->{attrs}{accessor} eq 'single')
168 my $rel_obj = delete $attrs->{$key};
169 if(!Scalar::Util::blessed($rel_obj)) {
170 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
173 if ($rel_obj->in_storage) {
174 $new->set_from_related($key, $rel_obj);
176 $new->{_rel_in_storage} = 0;
177 MULTICREATE_DEBUG and warn "MC $new uninserted $key $rel_obj\n";
180 $related->{$key} = $rel_obj;
182 } elsif ($info && $info->{attrs}{accessor}
183 && $info->{attrs}{accessor} eq 'multi'
184 && ref $attrs->{$key} eq 'ARRAY') {
185 my $others = delete $attrs->{$key};
186 my $total = @$others;
188 foreach my $idx (0 .. $#$others) {
189 my $rel_obj = $others->[$idx];
190 if(!Scalar::Util::blessed($rel_obj)) {
191 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
194 if ($rel_obj->in_storage) {
195 $new->set_from_related($key, $rel_obj);
197 $new->{_rel_in_storage} = 0;
198 MULTICREATE_DEBUG and
199 warn "MC $new uninserted $key $rel_obj (${\($idx+1)} of $total)\n";
201 $new->set_from_related($key, $rel_obj) if $rel_obj->in_storage;
202 push(@objects, $rel_obj);
204 $related->{$key} = \@objects;
206 } elsif ($info && $info->{attrs}{accessor}
207 && $info->{attrs}{accessor} eq 'filter')
209 ## 'filter' should disappear and get merged in with 'single' above!
210 my $rel_obj = delete $attrs->{$key};
211 if(!Scalar::Util::blessed($rel_obj)) {
212 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
214 unless ($rel_obj->in_storage) {
215 $new->{_rel_in_storage} = 0;
216 MULTICREATE_DEBUG and warn "MC $new uninserted $key $rel_obj";
218 $inflated->{$key} = $rel_obj;
220 } elsif ($class->has_column($key)
221 && $class->column_info($key)->{_inflate_info}) {
222 $inflated->{$key} = $attrs->{$key};
226 $new->throw_exception("No such column $key on $class")
227 unless $class->has_column($key);
228 $new->store_column($key => $attrs->{$key});
231 $new->{_relationship_data} = $related if $related;
232 $new->{_inflated_column} = $inflated if $inflated;
244 =item Arguments: none
246 =item Returns: The Row object
250 Inserts an object previously created by L</new> into the database if
251 it isn't already in there. Returns the object itself. Requires the
252 object's result source to be set, or the class to have a
253 result_source_instance method. To insert an entirely new row into
254 the database, use C<create> (see L<DBIx::Class::ResultSet/create>).
256 To fetch an uninserted row object, call
257 L<new|DBIx::Class::ResultSet/new> on a resultset.
259 This will also insert any uninserted, related objects held inside this
260 one, see L<DBIx::Class::ResultSet/create> for more details.
266 return $self if $self->in_storage;
267 my $source = $self->result_source;
268 $source ||= $self->result_source($self->result_source_instance)
269 if $self->can('result_source_instance');
270 $self->throw_exception("No result_source set on this object; can't insert")
275 # Check if we stored uninserted relobjs here in new()
276 my %related_stuff = (%{$self->{_relationship_data} || {}},
277 %{$self->{_inflated_column} || {}});
279 if(!$self->{_rel_in_storage}) {
281 # The guard will save us if we blow out of this scope via die
282 $rollback_guard = $source->storage->txn_scope_guard;
284 ## Should all be in relationship_data, but we need to get rid of the
285 ## 'filter' reltype..
286 ## These are the FK rels, need their IDs for the insert.
288 my @pri = $self->primary_columns;
290 REL: foreach my $relname (keys %related_stuff) {
292 my $rel_obj = $related_stuff{$relname};
294 next REL unless (Scalar::Util::blessed($rel_obj)
295 && $rel_obj->isa('DBIx::Class::Row'));
297 next REL unless $source->pk_depends_on(
298 $relname, { $rel_obj->get_columns }
301 MULTICREATE_DEBUG and warn "MC $self pre-reconstructing $relname $rel_obj\n";
303 my $them = { %{$rel_obj->{_relationship_data} || {} }, $rel_obj->get_inflated_columns };
304 my $re = $self->result_source
305 ->related_source($relname)
307 ->find_or_create($them);
308 %{$rel_obj} = %{$re};
309 $self->set_from_related($relname, $rel_obj);
310 delete $related_stuff{$relname};
314 MULTICREATE_DEBUG and do {
315 no warnings 'uninitialized';
316 warn "MC $self inserting (".join(', ', $self->get_columns).")\n";
318 my $updated_cols = $source->storage->insert($source, { $self->get_columns });
319 foreach my $col (keys %$updated_cols) {
320 $self->store_column($col, $updated_cols->{$col});
324 my @auto_pri = grep {
325 !defined $self->get_column($_) ||
326 ref($self->get_column($_)) eq 'SCALAR'
327 } $self->primary_columns;
330 #$self->throw_exception( "More than one possible key found for auto-inc on ".ref $self )
331 # if defined $too_many;
332 MULTICREATE_DEBUG and warn "MC $self fetching missing PKs ".join(', ', @auto_pri)."\n";
333 my $storage = $self->result_source->storage;
334 $self->throw_exception( "Missing primary key but Storage doesn't support last_insert_id" )
335 unless $storage->can('last_insert_id');
336 my @ids = $storage->last_insert_id($self->result_source,@auto_pri);
337 $self->throw_exception( "Can't get last insert id" )
338 unless (@ids == @auto_pri);
339 $self->store_column($auto_pri[$_] => $ids[$_]) for 0 .. $#ids;
340 #use Data::Dumper; warn Dumper($self);
344 $self->{_dirty_columns} = {};
345 $self->{related_resultsets} = {};
347 if(!$self->{_rel_in_storage}) {
348 ## Now do the relationships that need our ID (has_many etc.)
349 foreach my $relname (keys %related_stuff) {
350 my $rel_obj = $related_stuff{$relname};
352 if (Scalar::Util::blessed($rel_obj)
353 && $rel_obj->isa('DBIx::Class::Row')) {
355 } elsif (ref $rel_obj eq 'ARRAY') {
359 my $reverse = $source->reverse_relationship_info($relname);
360 foreach my $obj (@cands) {
361 $obj->set_from_related($_, $self) for keys %$reverse;
362 my $them = { %{$obj->{_relationship_data} || {} }, $obj->get_inflated_columns };
363 if ($self->__their_pk_needs_us($relname, $them)) {
364 if (exists $self->{_ignore_at_insert}{$relname}) {
365 MULTICREATE_DEBUG and warn "MC $self skipping post-insert on $relname";
367 MULTICREATE_DEBUG and warn "MC $self re-creating $relname $obj";
368 my $re = $self->result_source
369 ->related_source($relname)
371 ->find_or_create($them);
373 MULTICREATE_DEBUG and warn "MC $self new $relname $obj";
376 MULTICREATE_DEBUG and warn "MC $self post-inserting $obj";
382 delete $self->{_ignore_at_insert};
383 $rollback_guard->commit;
386 $self->in_storage(1);
387 undef $self->{_orig_ident};
393 $row->in_storage; # Get value
394 $row->in_storage(1); # Set value
398 =item Arguments: none or 1|0
404 Indicates whether the object exists as a row in the database or
405 not. This is set to true when L<DBIx::Class::ResultSet/find>,
406 L<DBIx::Class::ResultSet/create> or L<DBIx::Class::ResultSet/insert>
409 Creating a row object using L<DBIx::Class::ResultSet/new>, or calling
410 L</delete> on one, sets it to false.
415 my ($self, $val) = @_;
416 $self->{_in_storage} = $val if @_ > 1;
417 return $self->{_in_storage};
422 $row->update(\%columns?)
426 =item Arguments: none or a hashref
428 =item Returns: The Row object
432 Throws an exception if the row object is not yet in the database,
433 according to L</in_storage>.
435 This method issues an SQL UPDATE query to commit any changes to the
436 object to the database if required.
438 Also takes an optional hashref of C<< column_name => value> >> pairs
439 to update on the object first. Be aware that the hashref will be
440 passed to C<set_inflated_columns>, which might edit it in place, so
441 don't rely on it being the same after a call to C<update>. If you
442 need to preserve the hashref, it is sufficient to pass a shallow copy
443 to C<update>, e.g. ( { %{ $href } } )
445 If the values passed or any of the column values set on the object
446 contain scalar references, eg:
448 $row->last_modified(\'NOW()');
450 $row->update({ last_modified => \'NOW()' });
452 The update will pass the values verbatim into SQL. (See
453 L<SQL::Abstract> docs). The values in your Row object will NOT change
454 as a result of the update call, if you want the object to be updated
455 with the actual values from the database, call L</discard_changes>
458 $row->update()->discard_changes();
460 To determine before calling this method, which column values have
461 changed and will be updated, call L</get_dirty_columns>.
463 To check if any columns will be updated, call L</is_changed>.
465 To force a column to be updated, call L</make_column_dirty> before
471 my ($self, $upd) = @_;
472 $self->throw_exception( "Not in database" ) unless $self->in_storage;
473 my $ident_cond = $self->ident_condition;
474 $self->throw_exception("Cannot safely update a row in a PK-less table")
475 if ! keys %$ident_cond;
477 $self->set_inflated_columns($upd) if $upd;
478 my %to_update = $self->get_dirty_columns;
479 return $self unless keys %to_update;
480 my $rows = $self->result_source->storage->update(
481 $self->result_source, \%to_update,
482 $self->{_orig_ident} || $ident_cond
485 $self->throw_exception( "Can't update ${self}: row not found" );
486 } elsif ($rows > 1) {
487 $self->throw_exception("Can't update ${self}: updated more than one row");
489 $self->{_dirty_columns} = {};
490 $self->{related_resultsets} = {};
491 undef $self->{_orig_ident};
501 =item Arguments: none
503 =item Returns: The Row object
507 Throws an exception if the object is not in the database according to
508 L</in_storage>. Runs an SQL DELETE statement using the primary key
509 values to locate the row.
511 The object is still perfectly usable, but L</in_storage> will
512 now return 0 and the object must be reinserted using L</insert>
513 before it can be used to L</update> the row again.
515 If you delete an object in a class with a C<has_many> relationship, an
516 attempt is made to delete all the related objects as well. To turn
517 this behaviour off, pass C<< cascade_delete => 0 >> in the C<$attr>
518 hashref of the relationship, see L<DBIx::Class::Relationship>. Any
519 database-level cascade or restrict will take precedence over a
520 DBIx-Class-based cascading delete.
522 If you delete an object within a txn_do() (see L<DBIx::Class::Storage/txn_do>)
523 and the transaction subsequently fails, the row object will remain marked as
524 not being in storage. If you know for a fact that the object is still in
525 storage (i.e. by inspecting the cause of the transaction's failure), you can
526 use C<< $obj->in_storage(1) >> to restore consistency between the object and
527 the database. This would allow a subsequent C<< $obj->delete >> to work
530 See also L<DBIx::Class::ResultSet/delete>.
537 $self->throw_exception( "Not in database" ) unless $self->in_storage;
538 my $ident_cond = $self->{_orig_ident} || $self->ident_condition;
539 $self->throw_exception("Cannot safely delete a row in a PK-less table")
540 if ! keys %$ident_cond;
541 foreach my $column (keys %$ident_cond) {
542 $self->throw_exception("Can't delete the object unless it has loaded the primary keys")
543 unless exists $self->{_column_data}{$column};
545 $self->result_source->storage->delete(
546 $self->result_source, $ident_cond);
547 $self->in_storage(undef);
549 $self->throw_exception("Can't do class delete without a ResultSource instance")
550 unless $self->can('result_source_instance');
551 my $attrs = @_ > 1 && ref $_[$#_] eq 'HASH' ? { %{pop(@_)} } : {};
552 my $query = ref $_[0] eq 'HASH' ? $_[0] : {@_};
553 $self->result_source_instance->resultset->search(@_)->delete;
560 my $val = $row->get_column($col);
564 =item Arguments: $columnname
566 =item Returns: The value of the column
570 Throws an exception if the column name given doesn't exist according
573 Returns a raw column value from the row object, if it has already
574 been fetched from the database or set by an accessor.
576 If an L<inflated value|DBIx::Class::InflateColumn> has been set, it
577 will be deflated and returned.
579 Note that if you used the C<columns> or the C<select/as>
580 L<search attributes|DBIx::Class::ResultSet/ATTRIBUTES> on the resultset from
581 which C<$row> was derived, and B<did not include> C<$columnname> in the list,
582 this method will return C<undef> even if the database contains some value.
584 To retrieve all loaded column values as a hash, use L</get_columns>.
589 my ($self, $column) = @_;
590 $self->throw_exception( "Can't fetch data as class method" ) unless ref $self;
591 return $self->{_column_data}{$column} if exists $self->{_column_data}{$column};
592 if (exists $self->{_inflated_column}{$column}) {
593 return $self->store_column($column,
594 $self->_deflated_column($column, $self->{_inflated_column}{$column}));
596 $self->throw_exception( "No such column '${column}'" ) unless $self->has_column($column);
600 =head2 has_column_loaded
602 if ( $row->has_column_loaded($col) ) {
603 print "$col has been loaded from db";
608 =item Arguments: $columnname
614 Returns a true value if the column value has been loaded from the
615 database (or set locally).
619 sub has_column_loaded {
620 my ($self, $column) = @_;
621 $self->throw_exception( "Can't call has_column data as class method" ) unless ref $self;
622 return 1 if exists $self->{_inflated_column}{$column};
623 return exists $self->{_column_data}{$column};
628 my %data = $row->get_columns;
632 =item Arguments: none
634 =item Returns: A hash of columnname, value pairs.
638 Returns all loaded column data as a hash, containing raw values. To
639 get just one value for a particular column, use L</get_column>.
645 if (exists $self->{_inflated_column}) {
646 foreach my $col (keys %{$self->{_inflated_column}}) {
647 $self->store_column($col, $self->_deflated_column($col, $self->{_inflated_column}{$col}))
648 unless exists $self->{_column_data}{$col};
651 return %{$self->{_column_data}};
654 =head2 get_dirty_columns
656 my %data = $row->get_dirty_columns;
660 =item Arguments: none
662 =item Returns: A hash of column, value pairs
666 Only returns the column, value pairs for those columns that have been
667 changed on this object since the last L</update> or L</insert> call.
669 See L</get_columns> to fetch all column/value pairs.
673 sub get_dirty_columns {
675 return map { $_ => $self->{_column_data}{$_} }
676 keys %{$self->{_dirty_columns}};
679 =head2 make_column_dirty
681 $row->make_column_dirty($col)
685 =item Arguments: $columnname
687 =item Returns: undefined
691 Throws an exception if the column does not exist.
693 Marks a column as having been changed regardless of whether it has
697 sub make_column_dirty {
698 my ($self, $column) = @_;
700 $self->throw_exception( "No such column '${column}'" )
701 unless exists $self->{_column_data}{$column} || $self->has_column($column);
702 $self->{_dirty_columns}{$column} = 1;
705 =head2 get_inflated_columns
707 my %inflated_data = $obj->get_inflated_columns;
711 =item Arguments: none
713 =item Returns: A hash of column, object|value pairs
717 Returns a hash of all column keys and associated values. Values for any
718 columns set to use inflation will be inflated and returns as objects.
720 See L</get_columns> to get the uninflated values.
722 See L<DBIx::Class::InflateColumn> for how to setup inflation.
726 sub get_inflated_columns {
729 my $accessor = $self->column_info($_)->{'accessor'} || $_;
730 ($_ => $self->$accessor);
731 } grep $self->has_column_loaded($_), $self->columns;
736 $row->set_column($col => $val);
740 =item Arguments: $columnname, $value
742 =item Returns: $value
746 Sets a raw column value. If the new value is different from the old one,
747 the column is marked as dirty for when you next call L</update>.
749 If passed an object or reference as a value, this method will happily
750 attempt to store it, and a later L</insert> or L</update> will try and
751 stringify/numify as appropriate. To set an object to be deflated
752 instead, see L</set_inflated_columns>.
757 my ($self, $column, $new_value) = @_;
759 $self->{_orig_ident} ||= $self->ident_condition;
760 my $old_value = $self->get_column($column);
762 $self->store_column($column, $new_value);
763 $self->{_dirty_columns}{$column} = 1
764 if (defined $old_value xor defined $new_value) || (defined $old_value && $old_value ne $new_value);
766 # XXX clear out the relation cache for this column
767 delete $self->{related_resultsets}{$column};
774 $row->set_columns({ $col => $val, ... });
778 =item Arguments: \%columndata
780 =item Returns: The Row object
784 Sets multiple column, raw value pairs at once.
786 Works as L</set_column>.
791 my ($self,$data) = @_;
792 foreach my $col (keys %$data) {
793 $self->set_column($col,$data->{$col});
798 =head2 set_inflated_columns
800 $row->set_inflated_columns({ $col => $val, $relname => $obj, ... });
804 =item Arguments: \%columndata
806 =item Returns: The Row object
810 Sets more than one column value at once. Any inflated values are
811 deflated and the raw values stored.
813 Any related values passed as Row objects, using the relation name as a
814 key, are reduced to the appropriate foreign key values and stored. If
815 instead of related row objects, a hashref of column, value data is
816 passed, will create the related object first then store.
818 Will even accept arrayrefs of data as a value to a
819 L<DBIx::Class::Relationship/has_many> key, and create the related
820 objects if necessary.
822 Be aware that the input hashref might be edited in place, so dont rely
823 on it being the same after a call to C<set_inflated_columns>. If you
824 need to preserve the hashref, it is sufficient to pass a shallow copy
825 to C<set_inflated_columns>, e.g. ( { %{ $href } } )
827 See also L<DBIx::Class::Relationship::Base/set_from_related>.
831 sub set_inflated_columns {
832 my ( $self, $upd ) = @_;
833 foreach my $key (keys %$upd) {
834 if (ref $upd->{$key}) {
835 my $info = $self->relationship_info($key);
836 if ($info && $info->{attrs}{accessor}
837 && $info->{attrs}{accessor} eq 'single')
839 my $rel = delete $upd->{$key};
840 $self->set_from_related($key => $rel);
841 $self->{_relationship_data}{$key} = $rel;
842 } elsif ($info && $info->{attrs}{accessor}
843 && $info->{attrs}{accessor} eq 'multi') {
844 $self->throw_exception(
845 "Recursive update is not supported over relationships of type multi ($key)"
848 elsif ($self->has_column($key)
849 && exists $self->column_info($key)->{_inflate_info})
851 $self->set_inflated_column($key, delete $upd->{$key});
855 $self->set_columns($upd);
860 my $copy = $orig->copy({ change => $to, ... });
864 =item Arguments: \%replacementdata
866 =item Returns: The Row object copy
870 Inserts a new row into the database, as a copy of the original
871 object. If a hashref of replacement data is supplied, these will take
872 precedence over data in the original.
874 If the row has related objects in a
875 L<DBIx::Class::Relationship/has_many> then those objects may be copied
876 too depending on the L<cascade_copy|DBIx::Class::Relationship>
877 relationship attribute.
882 my ($self, $changes) = @_;
884 my $col_data = { %{$self->{_column_data}} };
885 foreach my $col (keys %$col_data) {
886 delete $col_data->{$col}
887 if $self->result_source->column_info($col)->{is_auto_increment};
890 my $new = { _column_data => $col_data };
891 bless $new, ref $self;
893 $new->result_source($self->result_source);
894 $new->set_inflated_columns($changes);
897 # Its possible we'll have 2 relations to the same Source. We need to make
898 # sure we don't try to insert the same row twice esle we'll violate unique
900 my $rels_copied = {};
902 foreach my $rel ($self->result_source->relationships) {
903 my $rel_info = $self->result_source->relationship_info($rel);
905 next unless $rel_info->{attrs}{cascade_copy};
907 my $resolved = $self->result_source->resolve_condition(
908 $rel_info->{cond}, $rel, $new
911 my $copied = $rels_copied->{ $rel_info->{source} } ||= {};
912 foreach my $related ($self->search_related($rel)) {
913 my $id_str = join("\0", $related->id);
914 next if $copied->{$id_str};
915 $copied->{$id_str} = 1;
916 my $rel_copy = $related->copy($resolved);
925 $row->store_column($col => $val);
929 =item Arguments: $columnname, $value
931 =item Returns: The value sent to storage
935 Set a raw value for a column without marking it as changed. This
936 method is used internally by L</set_column> which you should probably
939 This is the lowest level at which data is set on a row object,
940 extend this method to catch all data setting methods.
945 my ($self, $column, $value) = @_;
946 $self->throw_exception( "No such column '${column}'" )
947 unless exists $self->{_column_data}{$column} || $self->has_column($column);
948 $self->throw_exception( "set_column called for ${column} without value" )
950 return $self->{_column_data}{$column} = $value;
953 =head2 inflate_result
955 Class->inflate_result($result_source, \%me, \%prefetch?)
959 =item Arguments: $result_source, \%columndata, \%prefetcheddata
961 =item Returns: A Row object
965 All L<DBIx::Class::ResultSet> methods that retrieve data from the
966 database and turn it into row objects call this method.
968 Extend this method in your Result classes to hook into this process,
969 for example to rebless the result into a different class.
971 Reblessing can also be done more easily by setting C<result_class> in
972 your Result class. See L<DBIx::Class::ResultSource/result_class>.
977 my ($class, $source, $me, $prefetch) = @_;
979 my ($source_handle) = $source;
981 if ($source->isa('DBIx::Class::ResultSourceHandle')) {
982 $source = $source_handle->resolve
984 $source_handle = $source->handle
988 _source_handle => $source_handle,
992 bless $new, (ref $class || $class);
995 foreach my $pre (keys %{$prefetch||{}}) {
996 my $pre_val = $prefetch->{$pre};
997 my $pre_source = $source->related_source($pre);
998 $class->throw_exception("Can't prefetch non-existent relationship ${pre}")
1000 if (ref($pre_val->[0]) eq 'ARRAY') { # multi
1002 foreach my $pre_rec (@$pre_val) {
1003 unless ($pre_source->primary_columns == grep { exists $pre_rec->[0]{$_}
1004 and defined $pre_rec->[0]{$_} } $pre_source->primary_columns) {
1007 push(@pre_objects, $pre_source->result_class->inflate_result(
1008 $pre_source, @{$pre_rec}));
1010 $new->related_resultset($pre)->set_cache(\@pre_objects);
1011 } elsif (defined $pre_val->[0]) {
1013 unless ($pre_source->primary_columns == grep { exists $pre_val->[0]{$_}
1014 and !defined $pre_val->[0]{$_} } $pre_source->primary_columns)
1016 $fetched = $pre_source->result_class->inflate_result(
1017 $pre_source, @{$pre_val});
1019 $new->related_resultset($pre)->set_cache([ $fetched ]);
1020 my $accessor = $source->relationship_info($pre)->{attrs}{accessor};
1021 $class->throw_exception("No accessor for prefetched $pre")
1022 unless defined $accessor;
1023 if ($accessor eq 'single') {
1024 $new->{_relationship_data}{$pre} = $fetched;
1025 } elsif ($accessor eq 'filter') {
1026 $new->{_inflated_column}{$pre} = $fetched;
1028 $class->throw_exception("Prefetch not supported with accessor '$accessor'");
1035 =head2 update_or_insert
1037 $row->update_or_insert
1041 =item Arguments: none
1043 =item Returns: Result of update or insert operation
1047 L</Update>s the object if it's already in the database, according to
1048 L</in_storage>, else L</insert>s it.
1050 =head2 insert_or_update
1052 $obj->insert_or_update
1054 Alias for L</update_or_insert>
1058 sub insert_or_update { shift->update_or_insert(@_) }
1060 sub update_or_insert {
1062 return ($self->in_storage ? $self->update : $self->insert);
1067 my @changed_col_names = $row->is_changed();
1068 if ($row->is_changed()) { ... }
1072 =item Arguments: none
1074 =item Returns: 0|1 or @columnnames
1078 In list context returns a list of columns with uncommited changes, or
1079 in scalar context returns a true value if there are uncommitted
1085 return keys %{shift->{_dirty_columns} || {}};
1088 =head2 is_column_changed
1090 if ($row->is_column_changed('col')) { ... }
1094 =item Arguments: $columname
1100 Returns a true value if the column has uncommitted changes.
1104 sub is_column_changed {
1105 my( $self, $col ) = @_;
1106 return exists $self->{_dirty_columns}->{$col};
1109 =head2 result_source
1111 my $resultsource = $row->result_source;
1115 =item Arguments: none
1117 =item Returns: a ResultSource instance
1121 Accessor to the L<DBIx::Class::ResultSource> this object was created from.
1129 $self->_source_handle($_[0]->handle);
1131 $self->_source_handle->resolve;
1135 =head2 register_column
1137 $column_info = { .... };
1138 $class->register_column($column_name, $column_info);
1142 =item Arguments: $columnname, \%columninfo
1144 =item Returns: undefined
1148 Registers a column on the class. If the column_info has an 'accessor'
1149 key, creates an accessor named after the value if defined; if there is
1150 no such key, creates an accessor with the same name as the column
1152 The column_info attributes are described in
1153 L<DBIx::Class::ResultSource/add_columns>
1157 sub register_column {
1158 my ($class, $col, $info) = @_;
1160 if (exists $info->{accessor}) {
1161 return unless defined $info->{accessor};
1162 $acc = [ $info->{accessor}, $col ];
1164 $class->mk_group_accessors('column' => $acc);
1167 =head2 get_from_storage
1169 my $copy = $row->get_from_storage($attrs)
1173 =item Arguments: \%attrs
1175 =item Returns: A Row object
1179 Fetches a fresh copy of the Row object from the database and returns it.
1181 If passed the \%attrs argument, will first apply these attributes to
1182 the resultset used to find the row.
1184 This copy can then be used to compare to an existing row object, to
1185 determine if any changes have been made in the database since it was
1188 To just update your Row object with any latest changes from the
1189 database, use L</discard_changes> instead.
1191 The \%attrs argument should be compatible with
1192 L<DBIx::Class::ResultSet/ATTRIBUTES>.
1196 sub get_from_storage {
1197 my $self = shift @_;
1198 my $attrs = shift @_;
1199 my $resultset = $self->result_source->resultset;
1201 if(defined $attrs) {
1202 $resultset = $resultset->search(undef, $attrs);
1205 return $resultset->find($self->{_orig_ident} || $self->ident_condition);
1208 =head2 throw_exception
1210 See L<DBIx::Class::Schema/throw_exception>.
1214 sub throw_exception {
1216 if (ref $self && ref $self->result_source && $self->result_source->schema) {
1217 $self->result_source->schema->throw_exception(@_);
1229 =item Arguments: none
1231 =item Returns: A list of primary key values
1235 Returns the primary key(s) for a row. Can't be called as a class method.
1236 Actually implemented in L<DBIx::Class::PK>
1238 =head2 discard_changes
1240 $row->discard_changes
1244 =item Arguments: none
1246 =item Returns: nothing (updates object in-place)
1250 Retrieves and sets the row object data from the database, losing any
1253 This method can also be used to refresh from storage, retrieving any
1254 changes made since the row was last read from storage. Actually
1255 implemented in L<DBIx::Class::PK>
1263 Matt S. Trout <mst@shadowcatsystems.co.uk>
1267 You may distribute this code under the same terms as Perl itself.