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<create|DBIx::Class::ResultSet/create>, L<find|DBIx::Class::ResultSet/find>,
26 L<next|DBIx::Class::ResultSet/next> and L<all|DBIx::Class::ResultSet/all> methods,
27 as well as invocations of 'single' (
28 L<belongs_to|DBIx::Class::Relationship/belongs_to>,
29 L<has_one|DBIx::Class::Relationship/has_one> or
30 L<might_have|DBIx::Class::Relationship/might_have>)
31 relationship accessors of L<DBIx::Class::Row> objects.
37 my $row = My::Class->new(\%attrs);
39 my $row = $schema->resultset('MySource')->new(\%colsandvalues);
43 =item Arguments: \%attrs or \%colsandvalues
45 =item Returns: A Row object
49 While you can create a new row object by calling C<new> directly on
50 this class, you are better off calling it on a
51 L<DBIx::Class::ResultSet> object.
53 When calling it directly, you will not get a complete, usable row
54 object until you pass or set the C<source_handle> attribute, to a
55 L<DBIx::Class::ResultSource> instance that is attached to a
56 L<DBIx::Class::Schema> with a valid connection.
58 C<$attrs> is a hashref of column name, value data. It can also contain
59 some other attributes such as the C<source_handle>.
61 Passing an object, or an arrayref of objects as a value will call
62 L<DBIx::Class::Relationship::Base/set_from_related> for you. When
63 passed a hashref or an arrayref of hashrefs as the value, these will
64 be turned into objects via new_related, and treated as if you had
67 For a more involved explanation, see L<DBIx::Class::ResultSet/create>.
71 ## 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().
72 ## This only works because DBIC doesnt yet care to check whether the new_related objects have been passed all their mandatory columns
73 ## When doing the later insert, we need to make sure the PKs are set.
74 ## using _relationship_data in new and funky ways..
75 ## check Relationship::CascadeActions and Relationship::Accessor for compat
78 sub __new_related_find_or_new_helper {
79 my ($self, $relname, $data) = @_;
80 if ($self->__their_pk_needs_us($relname, $data)) {
81 return $self->result_source
82 ->related_source($relname)
86 if ($self->result_source->pk_depends_on($relname, $data)) {
87 return $self->result_source
88 ->related_source($relname)
90 ->find_or_create($data);
92 return $self->find_or_new_related($relname, $data);
95 sub __their_pk_needs_us { # this should maybe be in resultsource.
96 my ($self, $relname, $data) = @_;
97 my $source = $self->result_source;
98 my $reverse = $source->reverse_relationship_info($relname);
99 my $rel_source = $source->related_source($relname);
100 my $us = { $self->get_columns };
101 foreach my $key (keys %$reverse) {
102 # if their primary key depends on us, then we have to
103 # just create a result and we'll fill it out afterwards
104 return 1 if $rel_source->pk_depends_on($key, $us);
110 my ($class, $attrs) = @_;
111 $class = ref $class if ref $class;
118 if (my $handle = delete $attrs->{-source_handle}) {
119 $new->_source_handle($handle);
123 if ($source = delete $attrs->{-result_source}) {
124 $new->result_source($source);
128 $new->throw_exception("attrs must be a hashref")
129 unless ref($attrs) eq 'HASH';
131 my ($related,$inflated);
132 ## Pretend all the rels are actual objects, unset below if not, for insert() to fix
133 $new->{_rel_in_storage} = 1;
135 foreach my $key (keys %$attrs) {
136 if (ref $attrs->{$key}) {
137 ## Can we extract this lot to use with update(_or .. ) ?
138 confess "Can't do multi-create without result source" unless $source;
139 my $info = $source->relationship_info($key);
140 if ($info && $info->{attrs}{accessor}
141 && $info->{attrs}{accessor} eq 'single')
143 my $rel_obj = delete $attrs->{$key};
144 if(!Scalar::Util::blessed($rel_obj)) {
145 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
148 $new->{_rel_in_storage} = 0 unless ($rel_obj->in_storage);
150 $new->set_from_related($key, $rel_obj) if $rel_obj->in_storage;
151 $related->{$key} = $rel_obj;
153 } elsif ($info && $info->{attrs}{accessor}
154 && $info->{attrs}{accessor} eq 'multi'
155 && ref $attrs->{$key} eq 'ARRAY') {
156 my $others = delete $attrs->{$key};
157 foreach my $rel_obj (@$others) {
158 if(!Scalar::Util::blessed($rel_obj)) {
159 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
162 $new->{_rel_in_storage} = 0 unless ($rel_obj->in_storage);
163 $new->set_from_related($key, $rel_obj) if $rel_obj->in_storage;
165 $related->{$key} = $others;
167 } elsif ($info && $info->{attrs}{accessor}
168 && $info->{attrs}{accessor} eq 'filter')
170 ## 'filter' should disappear and get merged in with 'single' above!
171 my $rel_obj = delete $attrs->{$key};
172 if(!Scalar::Util::blessed($rel_obj)) {
173 $rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
175 $new->{_rel_in_storage} = 0 unless ($rel_obj->in_storage);
176 $inflated->{$key} = $rel_obj;
178 } elsif ($class->has_column($key)
179 && $class->column_info($key)->{_inflate_info}) {
180 $inflated->{$key} = $attrs->{$key};
184 $new->throw_exception("No such column $key on $class")
185 unless $class->has_column($key);
186 $new->store_column($key => $attrs->{$key});
189 $new->{_relationship_data} = $related if $related;
190 $new->{_inflated_column} = $inflated if $inflated;
202 =item Arguments: none
204 =item Returns: The Row object
208 Inserts an object previously created by L</new> into the database if
209 it isn't already in there. Returns the object itself. Requires the
210 object's result source to be set, or the class to have a
211 result_source_instance method. To insert an entirely new row into
212 the database, use C<create> (see L<DBIx::Class::ResultSet/create>).
214 To fetch an uninserted row object, call
215 L<new|DBIx::Class::ResultSet/new> on a resultset.
217 This will also insert any uninserted, related objects held inside this
218 one, see L<DBIx::Class::ResultSet/create> for more details.
224 return $self if $self->in_storage;
225 my $source = $self->result_source;
226 $source ||= $self->result_source($self->result_source_instance)
227 if $self->can('result_source_instance');
228 $self->throw_exception("No result_source set on this object; can't insert")
233 # Check if we stored uninserted relobjs here in new()
234 my %related_stuff = (%{$self->{_relationship_data} || {}},
235 %{$self->{_inflated_column} || {}});
237 if(!$self->{_rel_in_storage}) {
239 # The guard will save us if we blow out of this scope via die
240 $rollback_guard = $source->storage->txn_scope_guard;
242 ## Should all be in relationship_data, but we need to get rid of the
243 ## 'filter' reltype..
244 ## These are the FK rels, need their IDs for the insert.
246 my @pri = $self->primary_columns;
248 REL: foreach my $relname (keys %related_stuff) {
250 my $rel_obj = $related_stuff{$relname};
252 next REL unless (Scalar::Util::blessed($rel_obj)
253 && $rel_obj->isa('DBIx::Class::Row'));
255 next REL unless $source->pk_depends_on(
256 $relname, { $rel_obj->get_columns }
260 $self->set_from_related($relname, $rel_obj);
261 delete $related_stuff{$relname};
265 my $updated_cols = $source->storage->insert($source, { $self->get_columns });
266 $self->set_columns($updated_cols);
269 my @auto_pri = grep {
270 !defined $self->get_column($_) ||
271 ref($self->get_column($_)) eq 'SCALAR'
272 } $self->primary_columns;
275 #$self->throw_exception( "More than one possible key found for auto-inc on ".ref $self )
276 # if defined $too_many;
278 my $storage = $self->result_source->storage;
279 $self->throw_exception( "Missing primary key but Storage doesn't support last_insert_id" )
280 unless $storage->can('last_insert_id');
281 my @ids = $storage->last_insert_id($self->result_source,@auto_pri);
282 $self->throw_exception( "Can't get last insert id" )
283 unless (@ids == @auto_pri);
284 $self->store_column($auto_pri[$_] => $ids[$_]) for 0 .. $#ids;
287 $self->{_dirty_columns} = {};
288 $self->{related_resultsets} = {};
290 if(!$self->{_rel_in_storage}) {
291 ## Now do the has_many rels, that need $selfs ID.
292 foreach my $relname (keys %related_stuff) {
293 my $rel_obj = $related_stuff{$relname};
295 if (Scalar::Util::blessed($rel_obj)
296 && $rel_obj->isa('DBIx::Class::Row')) {
298 } elsif (ref $rel_obj eq 'ARRAY') {
302 my $reverse = $source->reverse_relationship_info($relname);
303 foreach my $obj (@cands) {
304 $obj->set_from_related($_, $self) for keys %$reverse;
305 my $them = { %{$obj->{_relationship_data} || {} }, $obj->get_inflated_columns };
306 if ($self->__their_pk_needs_us($relname, $them)) {
307 $obj = $self->find_or_create_related($relname, $them);
314 $rollback_guard->commit;
317 $self->in_storage(1);
318 undef $self->{_orig_ident};
324 $row->in_storage; # Get value
325 $row->in_storage(1); # Set value
329 =item Arguments: none or 1|0
335 Indicates whether the object exists as a row in the database or
336 not. This is set to true when L<DBIx::Class::ResultSet/find>,
337 L<DBIx::Class::ResultSet/create> or L<DBIx::Class::ResultSet/insert>
340 Creating a row object using L<DBIx::Class::ResultSet/new>, or calling
341 L</delete> on one, sets it to false.
346 my ($self, $val) = @_;
347 $self->{_in_storage} = $val if @_ > 1;
348 return $self->{_in_storage};
353 $row->update(\%columns?)
357 =item Arguments: none or a hashref
359 =item Returns: The Row object
363 Throws an exception if the row object is not yet in the database,
364 according to L</in_storage>.
366 This method issues an SQL UPDATE query to commit any changes to the
367 object to the database if required.
369 Also takes an optional hashref of C<< column_name => value> >> pairs
370 to update on the object first. Be aware that the hashref will be
371 passed to C<set_inflated_columns>, which might edit it in place, so
372 don't rely on it being the same after a call to C<update>. If you
373 need to preserve the hashref, it is sufficient to pass a shallow copy
374 to C<update>, e.g. ( { %{ $href } } )
376 If the values passed or any of the column values set on the object
377 contain scalar references, eg:
379 $row->last_modified(\'NOW()');
381 $row->update({ last_modified => \'NOW()' });
383 The update will pass the values verbatim into SQL. (See
384 L<SQL::Abstract> docs). The values in your Row object will NOT change
385 as a result of the update call, if you want the object to be updated
386 with the actual values from the database, call L</discard_changes>
389 $row->update()->discard_changes();
391 To determine before calling this method, which column values have
392 changed and will be updated, call L</get_dirty_columns>.
394 To check if any columns will be updated, call L</is_changed>.
396 To force a column to be updated, call L</make_column_dirty> before
402 my ($self, $upd) = @_;
403 $self->throw_exception( "Not in database" ) unless $self->in_storage;
404 my $ident_cond = $self->ident_condition;
405 $self->throw_exception("Cannot safely update a row in a PK-less table")
406 if ! keys %$ident_cond;
408 $self->set_inflated_columns($upd) if $upd;
409 my %to_update = $self->get_dirty_columns;
410 return $self unless keys %to_update;
411 my $rows = $self->result_source->storage->update(
412 $self->result_source, \%to_update,
413 $self->{_orig_ident} || $ident_cond
416 $self->throw_exception( "Can't update ${self}: row not found" );
417 } elsif ($rows > 1) {
418 $self->throw_exception("Can't update ${self}: updated more than one row");
420 $self->{_dirty_columns} = {};
421 $self->{related_resultsets} = {};
422 undef $self->{_orig_ident};
432 =item Arguments: none
434 =item Returns: The Row object
438 Throws an exception if the object is not in the database according to
439 L</in_storage>. Runs an SQL DELETE statement using the primary key
440 values to locate the row.
442 The object is still perfectly usable, but L</in_storage> will
443 now return 0 and the object must be reinserted using L</insert>
444 before it can be used to L</update> the row again.
446 If you delete an object in a class with a C<has_many> relationship, an
447 attempt is made to delete all the related objects as well. To turn
448 this behaviour off, pass C<< cascade_delete => 0 >> in the C<$attr>
449 hashref of the relationship, see L<DBIx::Class::Relationship>. Any
450 database-level cascade or restrict will take precedence over a
451 DBIx-Class-based cascading delete.
453 See also L<DBIx::Class::ResultSet/delete>.
460 $self->throw_exception( "Not in database" ) unless $self->in_storage;
461 my $ident_cond = $self->{_orig_ident} || $self->ident_condition;
462 $self->throw_exception("Cannot safely delete a row in a PK-less table")
463 if ! keys %$ident_cond;
464 foreach my $column (keys %$ident_cond) {
465 $self->throw_exception("Can't delete the object unless it has loaded the primary keys")
466 unless exists $self->{_column_data}{$column};
468 $self->result_source->storage->delete(
469 $self->result_source, $ident_cond);
470 $self->in_storage(undef);
472 $self->throw_exception("Can't do class delete without a ResultSource instance")
473 unless $self->can('result_source_instance');
474 my $attrs = @_ > 1 && ref $_[$#_] eq 'HASH' ? { %{pop(@_)} } : {};
475 my $query = ref $_[0] eq 'HASH' ? $_[0] : {@_};
476 $self->result_source_instance->resultset->search(@_)->delete;
483 my $val = $row->get_column($col);
487 =item Arguments: $columnname
489 =item Returns: The value of the column
493 Throws an exception if the column name given doesn't exist according
496 Returns a raw column value from the row object, if it has already
497 been fetched from the database or set by an accessor.
499 If an L<inflated value|DBIx::Class::InflateColumn> has been set, it
500 will be deflated and returned.
502 Note that if you used the C<columns> or the C<select/as>
503 L<search attributes|DBIx::Class::ResultSet/ATTRIBUTES> on the resultset from
504 which C<$row> was derived, and B<did not include> C<$columnname> in the list,
505 this method will return C<undef> even if the database contains some value.
507 To retrieve all loaded column values as a hash, use L</get_columns>.
512 my ($self, $column) = @_;
513 $self->throw_exception( "Can't fetch data as class method" ) unless ref $self;
514 return $self->{_column_data}{$column} if exists $self->{_column_data}{$column};
515 if (exists $self->{_inflated_column}{$column}) {
516 return $self->store_column($column,
517 $self->_deflated_column($column, $self->{_inflated_column}{$column}));
519 $self->throw_exception( "No such column '${column}'" ) unless $self->has_column($column);
523 =head2 has_column_loaded
525 if ( $row->has_column_loaded($col) ) {
526 print "$col has been loaded from db";
531 =item Arguments: $columnname
537 Returns a true value if the column value has been loaded from the
538 database (or set locally).
542 sub has_column_loaded {
543 my ($self, $column) = @_;
544 $self->throw_exception( "Can't call has_column data as class method" ) unless ref $self;
545 return 1 if exists $self->{_inflated_column}{$column};
546 return exists $self->{_column_data}{$column};
551 my %data = $row->get_columns;
555 =item Arguments: none
557 =item Returns: A hash of columnname, value pairs.
561 Returns all loaded column data as a hash, containing raw values. To
562 get just one value for a particular column, use L</get_column>.
568 if (exists $self->{_inflated_column}) {
569 foreach my $col (keys %{$self->{_inflated_column}}) {
570 $self->store_column($col, $self->_deflated_column($col, $self->{_inflated_column}{$col}))
571 unless exists $self->{_column_data}{$col};
574 return %{$self->{_column_data}};
577 =head2 get_dirty_columns
579 my %data = $row->get_dirty_columns;
583 =item Arguments: none
585 =item Returns: A hash of column, value pairs
589 Only returns the column, value pairs for those columns that have been
590 changed on this object since the last L</update> or L</insert> call.
592 See L</get_columns> to fetch all column/value pairs.
596 sub get_dirty_columns {
598 return map { $_ => $self->{_column_data}{$_} }
599 keys %{$self->{_dirty_columns}};
602 =head2 make_column_dirty
604 $row->make_column_dirty($col)
608 =item Arguments: $columnname
610 =item Returns: undefined
614 Throws an exception if the column does not exist.
616 Marks a column as having been changed regardless of whether it has
620 sub make_column_dirty {
621 my ($self, $column) = @_;
623 $self->throw_exception( "No such column '${column}'" )
624 unless exists $self->{_column_data}{$column} || $self->has_column($column);
625 $self->{_dirty_columns}{$column} = 1;
628 =head2 get_inflated_columns
630 my %inflated_data = $obj->get_inflated_columns;
634 =item Arguments: none
636 =item Returns: A hash of column, object|value pairs
640 Returns a hash of all column keys and associated values. Values for any
641 columns set to use inflation will be inflated and returns as objects.
643 See L</get_columns> to get the uninflated values.
645 See L<DBIx::Class::InflateColumn> for how to setup inflation.
649 sub get_inflated_columns {
652 my $accessor = $self->column_info($_)->{'accessor'} || $_;
653 ($_ => $self->$accessor);
659 $row->set_column($col => $val);
663 =item Arguments: $columnname, $value
665 =item Returns: $value
669 Sets a raw column value. If the new value is different from the old one,
670 the column is marked as dirty for when you next call L</update>.
672 If passed an object or reference as a value, this method will happily
673 attempt to store it, and a later L</insert> or L</update> will try and
674 stringify/numify as appropriate. To set an object to be deflated
675 instead, see L</set_inflated_columns>.
680 my ($self, $column, $new_value) = @_;
682 $self->{_orig_ident} ||= $self->ident_condition;
683 my $old_value = $self->get_column($column);
685 $self->store_column($column, $new_value);
686 $self->{_dirty_columns}{$column} = 1
687 if (defined $old_value xor defined $new_value) || (defined $old_value && $old_value ne $new_value);
689 # XXX clear out the relation cache for this column
690 delete $self->{related_resultsets}{$column};
697 $row->set_columns({ $col => $val, ... });
701 =item Arguments: \%columndata
703 =item Returns: The Row object
707 Sets multiple column, raw value pairs at once.
709 Works as L</set_column>.
714 my ($self,$data) = @_;
715 foreach my $col (keys %$data) {
716 $self->set_column($col,$data->{$col});
721 =head2 set_inflated_columns
723 $row->set_inflated_columns({ $col => $val, $relname => $obj, ... });
727 =item Arguments: \%columndata
729 =item Returns: The Row object
733 Sets more than one column value at once. Any inflated values are
734 deflated and the raw values stored.
736 Any related values passed as Row objects, using the relation name as a
737 key, are reduced to the appropriate foreign key values and stored. If
738 instead of related row objects, a hashref of column, value data is
739 passed, will create the related object first then store.
741 Will even accept arrayrefs of data as a value to a
742 L<DBIx::Class::Relationship/has_many> key, and create the related
743 objects if necessary.
745 Be aware that the input hashref might be edited in place, so dont rely
746 on it being the same after a call to C<set_inflated_columns>. If you
747 need to preserve the hashref, it is sufficient to pass a shallow copy
748 to C<set_inflated_columns>, e.g. ( { %{ $href } } )
750 See also L<DBIx::Class::Relationship::Base/set_from_related>.
754 sub set_inflated_columns {
755 my ( $self, $upd ) = @_;
756 foreach my $key (keys %$upd) {
757 if (ref $upd->{$key}) {
758 my $info = $self->relationship_info($key);
759 if ($info && $info->{attrs}{accessor}
760 && $info->{attrs}{accessor} eq 'single')
762 my $rel = delete $upd->{$key};
763 $self->set_from_related($key => $rel);
764 $self->{_relationship_data}{$key} = $rel;
765 } elsif ($info && $info->{attrs}{accessor}
766 && $info->{attrs}{accessor} eq 'multi') {
767 $self->throw_exception(
768 "Recursive update is not supported over relationships of type multi ($key)"
771 elsif ($self->has_column($key)
772 && exists $self->column_info($key)->{_inflate_info})
774 $self->set_inflated_column($key, delete $upd->{$key});
778 $self->set_columns($upd);
783 my $copy = $orig->copy({ change => $to, ... });
787 =item Arguments: \%replacementdata
789 =item Returns: The Row object copy
793 Inserts a new row into the database, as a copy of the original
794 object. If a hashref of replacement data is supplied, these will take
795 precedence over data in the original.
797 If the row has related objects in a
798 L<DBIx::Class::Relationship/has_many> then those objects may be copied
799 too depending on the L<cascade_copy|DBIx::Class::Relationship>
800 relationship attribute.
805 my ($self, $changes) = @_;
807 my $col_data = { %{$self->{_column_data}} };
808 foreach my $col (keys %$col_data) {
809 delete $col_data->{$col}
810 if $self->result_source->column_info($col)->{is_auto_increment};
813 my $new = { _column_data => $col_data };
814 bless $new, ref $self;
816 $new->result_source($self->result_source);
817 $new->set_inflated_columns($changes);
820 # Its possible we'll have 2 relations to the same Source. We need to make
821 # sure we don't try to insert the same row twice esle we'll violate unique
823 my $rels_copied = {};
825 foreach my $rel ($self->result_source->relationships) {
826 my $rel_info = $self->result_source->relationship_info($rel);
828 next unless $rel_info->{attrs}{cascade_copy};
830 my $resolved = $self->result_source->resolve_condition(
831 $rel_info->{cond}, $rel, $new
834 my $copied = $rels_copied->{ $rel_info->{source} } ||= {};
835 foreach my $related ($self->search_related($rel)) {
836 my $id_str = join("\0", $related->id);
837 next if $copied->{$id_str};
838 $copied->{$id_str} = 1;
839 my $rel_copy = $related->copy($resolved);
848 $row->store_column($col => $val);
852 =item Arguments: $columnname, $value
854 =item Returns: The value sent to storage
858 Set a raw value for a column without marking it as changed. This
859 method is used internally by L</set_column> which you should probably
862 This is the lowest level at which data is set on a row object,
863 extend this method to catch all data setting methods.
868 my ($self, $column, $value) = @_;
869 $self->throw_exception( "No such column '${column}'" )
870 unless exists $self->{_column_data}{$column} || $self->has_column($column);
871 $self->throw_exception( "set_column called for ${column} without value" )
873 return $self->{_column_data}{$column} = $value;
876 =head2 inflate_result
878 Class->inflate_result($result_source, \%me, \%prefetch?)
882 =item Arguments: $result_source, \%columndata, \%prefetcheddata
884 =item Returns: A Row object
888 All L<DBIx::Class::ResultSet> methods that retrieve data from the
889 database and turn it into row objects call this method.
891 Extend this method in your Result classes to hook into this process,
892 for example to rebless the result into a different class.
894 Reblessing can also be done more easily by setting C<result_class> in
895 your Result class. See L<DBIx::Class::ResultSource/result_class>.
900 my ($class, $source, $me, $prefetch) = @_;
902 my ($source_handle) = $source;
904 if ($source->isa('DBIx::Class::ResultSourceHandle')) {
905 $source = $source_handle->resolve
907 $source_handle = $source->handle
911 _source_handle => $source_handle,
915 bless $new, (ref $class || $class);
918 foreach my $pre (keys %{$prefetch||{}}) {
919 my $pre_val = $prefetch->{$pre};
920 my $pre_source = $source->related_source($pre);
921 $class->throw_exception("Can't prefetch non-existent relationship ${pre}")
923 if (ref($pre_val->[0]) eq 'ARRAY') { # multi
925 foreach my $pre_rec (@$pre_val) {
926 unless ($pre_source->primary_columns == grep { exists $pre_rec->[0]{$_}
927 and defined $pre_rec->[0]{$_} } $pre_source->primary_columns) {
930 push(@pre_objects, $pre_source->result_class->inflate_result(
931 $pre_source, @{$pre_rec}));
933 $new->related_resultset($pre)->set_cache(\@pre_objects);
934 } elsif (defined $pre_val->[0]) {
936 unless ($pre_source->primary_columns == grep { exists $pre_val->[0]{$_}
937 and !defined $pre_val->[0]{$_} } $pre_source->primary_columns)
939 $fetched = $pre_source->result_class->inflate_result(
940 $pre_source, @{$pre_val});
942 $new->related_resultset($pre)->set_cache([ $fetched ]);
943 my $accessor = $source->relationship_info($pre)->{attrs}{accessor};
944 $class->throw_exception("No accessor for prefetched $pre")
945 unless defined $accessor;
946 if ($accessor eq 'single') {
947 $new->{_relationship_data}{$pre} = $fetched;
948 } elsif ($accessor eq 'filter') {
949 $new->{_inflated_column}{$pre} = $fetched;
951 $class->throw_exception("Prefetch not supported with accessor '$accessor'");
958 =head2 update_or_insert
960 $row->update_or_insert
964 =item Arguments: none
966 =item Returns: Result of update or insert operation
970 L</Update>s the object if it's already in the database, according to
971 L</in_storage>, else L</insert>s it.
973 =head2 insert_or_update
975 $obj->insert_or_update
977 Alias for L</update_or_insert>
981 sub insert_or_update { shift->update_or_insert(@_) }
983 sub update_or_insert {
985 return ($self->in_storage ? $self->update : $self->insert);
990 my @changed_col_names = $row->is_changed();
991 if ($row->is_changed()) { ... }
995 =item Arguments: none
997 =item Returns: 0|1 or @columnnames
1001 In list context returns a list of columns with uncommited changes, or
1002 in scalar context returns a true value if there are uncommitted
1008 return keys %{shift->{_dirty_columns} || {}};
1011 =head2 is_column_changed
1013 if ($row->is_column_changed('col')) { ... }
1017 =item Arguments: $columname
1023 Returns a true value if the column has uncommitted changes.
1027 sub is_column_changed {
1028 my( $self, $col ) = @_;
1029 return exists $self->{_dirty_columns}->{$col};
1032 =head2 result_source
1034 my $resultsource = $row->result_source;
1038 =item Arguments: none
1040 =item Returns: a ResultSource instance
1044 Accessor to the L<DBIx::Class::ResultSource> this object was created from.
1052 $self->_source_handle($_[0]->handle);
1054 $self->_source_handle->resolve;
1058 =head2 register_column
1060 $column_info = { .... };
1061 $class->register_column($column_name, $column_info);
1065 =item Arguments: $columnname, \%columninfo
1067 =item Returns: undefined
1071 Registers a column on the class. If the column_info has an 'accessor'
1072 key, creates an accessor named after the value if defined; if there is
1073 no such key, creates an accessor with the same name as the column
1075 The column_info attributes are described in
1076 L<DBIx::Class::ResultSource/add_columns>
1080 sub register_column {
1081 my ($class, $col, $info) = @_;
1083 if (exists $info->{accessor}) {
1084 return unless defined $info->{accessor};
1085 $acc = [ $info->{accessor}, $col ];
1087 $class->mk_group_accessors('column' => $acc);
1090 =head2 get_from_storage
1092 my $copy = $row->get_from_storage($attrs)
1096 =item Arguments: \%attrs
1098 =item Returns: A Row object
1102 Fetches a fresh copy of the Row object from the database and returns it.
1104 If passed the \%attrs argument, will first apply these attributes to
1105 the resultset used to find the row.
1107 This copy can then be used to compare to an existing row object, to
1108 determine if any changes have been made in the database since it was
1111 To just update your Row object with any latest changes from the
1112 database, use L</discard_changes> instead.
1114 The \%attrs argument should be compatible with
1115 L<DBIx::Class::ResultSet/ATTRIBUTES>.
1119 sub get_from_storage {
1120 my $self = shift @_;
1121 my $attrs = shift @_;
1122 my $resultset = $self->result_source->resultset;
1124 if(defined $attrs) {
1125 $resultset = $resultset->search(undef, $attrs);
1128 return $resultset->find($self->{_orig_ident} || $self->ident_condition);
1131 =head2 throw_exception
1133 See L<DBIx::Class::Schema/throw_exception>.
1137 sub throw_exception {
1139 if (ref $self && ref $self->result_source && $self->result_source->schema) {
1140 $self->result_source->schema->throw_exception(@_);
1152 =item Arguments: none
1154 =item Returns: A list of primary key values
1158 Returns the primary key(s) for a row. Can't be called as a class method.
1159 Actually implemented in L<DBIx::Class::PK>
1161 =head2 discard_changes
1163 $row->discard_changes
1167 =item Arguments: none
1169 =item Returns: nothing (updates object in-place)
1173 Retrieves and sets the row object data from the database, losing any
1176 This method can also be used to refresh from storage, retrieving any
1177 changes made since the row was last read from storage. Actually
1178 implemented in L<DBIx::Class::PK>
1186 Matt S. Trout <mst@shadowcatsystems.co.uk>
1190 You may distribute this code under the same terms as Perl itself.