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 If you delete an object within a txn_do() (see L<DBIx::Class::Storage/txn_do>)
454 and the transaction subsequently fails, the row object will remain marked as
455 not being in storage. If you know for a fact that the object is still in
456 storage (i.e. by inspecting the cause of the transaction's failure), you can
457 use C<< $obj->in_storage(1) >> to restore consistency between the object and
458 the database. This would allow a subsequent C<< $obj->delete >> to work
461 See also L<DBIx::Class::ResultSet/delete>.
468 $self->throw_exception( "Not in database" ) unless $self->in_storage;
469 my $ident_cond = $self->{_orig_ident} || $self->ident_condition;
470 $self->throw_exception("Cannot safely delete a row in a PK-less table")
471 if ! keys %$ident_cond;
472 foreach my $column (keys %$ident_cond) {
473 $self->throw_exception("Can't delete the object unless it has loaded the primary keys")
474 unless exists $self->{_column_data}{$column};
476 $self->result_source->storage->delete(
477 $self->result_source, $ident_cond);
478 $self->in_storage(undef);
480 $self->throw_exception("Can't do class delete without a ResultSource instance")
481 unless $self->can('result_source_instance');
482 my $attrs = @_ > 1 && ref $_[$#_] eq 'HASH' ? { %{pop(@_)} } : {};
483 my $query = ref $_[0] eq 'HASH' ? $_[0] : {@_};
484 $self->result_source_instance->resultset->search(@_)->delete;
491 my $val = $row->get_column($col);
495 =item Arguments: $columnname
497 =item Returns: The value of the column
501 Throws an exception if the column name given doesn't exist according
504 Returns a raw column value from the row object, if it has already
505 been fetched from the database or set by an accessor.
507 If an L<inflated value|DBIx::Class::InflateColumn> has been set, it
508 will be deflated and returned.
510 Note that if you used the C<columns> or the C<select/as>
511 L<search attributes|DBIx::Class::ResultSet/ATTRIBUTES> on the resultset from
512 which C<$row> was derived, and B<did not include> C<$columnname> in the list,
513 this method will return C<undef> even if the database contains some value.
515 To retrieve all loaded column values as a hash, use L</get_columns>.
520 my ($self, $column) = @_;
521 $self->throw_exception( "Can't fetch data as class method" ) unless ref $self;
522 return $self->{_column_data}{$column} if exists $self->{_column_data}{$column};
523 if (exists $self->{_inflated_column}{$column}) {
524 return $self->store_column($column,
525 $self->_deflated_column($column, $self->{_inflated_column}{$column}));
527 $self->throw_exception( "No such column '${column}'" ) unless $self->has_column($column);
531 =head2 has_column_loaded
533 if ( $row->has_column_loaded($col) ) {
534 print "$col has been loaded from db";
539 =item Arguments: $columnname
545 Returns a true value if the column value has been loaded from the
546 database (or set locally).
550 sub has_column_loaded {
551 my ($self, $column) = @_;
552 $self->throw_exception( "Can't call has_column data as class method" ) unless ref $self;
553 return 1 if exists $self->{_inflated_column}{$column};
554 return exists $self->{_column_data}{$column};
559 my %data = $row->get_columns;
563 =item Arguments: none
565 =item Returns: A hash of columnname, value pairs.
569 Returns all loaded column data as a hash, containing raw values. To
570 get just one value for a particular column, use L</get_column>.
576 if (exists $self->{_inflated_column}) {
577 foreach my $col (keys %{$self->{_inflated_column}}) {
578 $self->store_column($col, $self->_deflated_column($col, $self->{_inflated_column}{$col}))
579 unless exists $self->{_column_data}{$col};
582 return %{$self->{_column_data}};
585 =head2 get_dirty_columns
587 my %data = $row->get_dirty_columns;
591 =item Arguments: none
593 =item Returns: A hash of column, value pairs
597 Only returns the column, value pairs for those columns that have been
598 changed on this object since the last L</update> or L</insert> call.
600 See L</get_columns> to fetch all column/value pairs.
604 sub get_dirty_columns {
606 return map { $_ => $self->{_column_data}{$_} }
607 keys %{$self->{_dirty_columns}};
610 =head2 make_column_dirty
612 $row->make_column_dirty($col)
616 =item Arguments: $columnname
618 =item Returns: undefined
622 Throws an exception if the column does not exist.
624 Marks a column as having been changed regardless of whether it has
628 sub make_column_dirty {
629 my ($self, $column) = @_;
631 $self->throw_exception( "No such column '${column}'" )
632 unless exists $self->{_column_data}{$column} || $self->has_column($column);
633 $self->{_dirty_columns}{$column} = 1;
636 =head2 get_inflated_columns
638 my %inflated_data = $obj->get_inflated_columns;
642 =item Arguments: none
644 =item Returns: A hash of column, object|value pairs
648 Returns a hash of all column keys and associated values. Values for any
649 columns set to use inflation will be inflated and returns as objects.
651 See L</get_columns> to get the uninflated values.
653 See L<DBIx::Class::InflateColumn> for how to setup inflation.
657 sub get_inflated_columns {
660 my $accessor = $self->column_info($_)->{'accessor'} || $_;
661 ($_ => $self->$accessor);
667 $row->set_column($col => $val);
671 =item Arguments: $columnname, $value
673 =item Returns: $value
677 Sets a raw column value. If the new value is different from the old one,
678 the column is marked as dirty for when you next call L</update>.
680 If passed an object or reference as a value, this method will happily
681 attempt to store it, and a later L</insert> or L</update> will try and
682 stringify/numify as appropriate. To set an object to be deflated
683 instead, see L</set_inflated_columns>.
688 my ($self, $column, $new_value) = @_;
690 $self->{_orig_ident} ||= $self->ident_condition;
691 my $old_value = $self->get_column($column);
693 $self->store_column($column, $new_value);
694 $self->{_dirty_columns}{$column} = 1
695 if (defined $old_value xor defined $new_value) || (defined $old_value && $old_value ne $new_value);
697 # XXX clear out the relation cache for this column
698 delete $self->{related_resultsets}{$column};
705 $row->set_columns({ $col => $val, ... });
709 =item Arguments: \%columndata
711 =item Returns: The Row object
715 Sets multiple column, raw value pairs at once.
717 Works as L</set_column>.
722 my ($self,$data) = @_;
723 foreach my $col (keys %$data) {
724 $self->set_column($col,$data->{$col});
729 =head2 set_inflated_columns
731 $row->set_inflated_columns({ $col => $val, $relname => $obj, ... });
735 =item Arguments: \%columndata
737 =item Returns: The Row object
741 Sets more than one column value at once. Any inflated values are
742 deflated and the raw values stored.
744 Any related values passed as Row objects, using the relation name as a
745 key, are reduced to the appropriate foreign key values and stored. If
746 instead of related row objects, a hashref of column, value data is
747 passed, will create the related object first then store.
749 Will even accept arrayrefs of data as a value to a
750 L<DBIx::Class::Relationship/has_many> key, and create the related
751 objects if necessary.
753 Be aware that the input hashref might be edited in place, so dont rely
754 on it being the same after a call to C<set_inflated_columns>. If you
755 need to preserve the hashref, it is sufficient to pass a shallow copy
756 to C<set_inflated_columns>, e.g. ( { %{ $href } } )
758 See also L<DBIx::Class::Relationship::Base/set_from_related>.
762 sub set_inflated_columns {
763 my ( $self, $upd ) = @_;
764 foreach my $key (keys %$upd) {
765 if (ref $upd->{$key}) {
766 my $info = $self->relationship_info($key);
767 if ($info && $info->{attrs}{accessor}
768 && $info->{attrs}{accessor} eq 'single')
770 my $rel = delete $upd->{$key};
771 $self->set_from_related($key => $rel);
772 $self->{_relationship_data}{$key} = $rel;
773 } elsif ($info && $info->{attrs}{accessor}
774 && $info->{attrs}{accessor} eq 'multi') {
775 $self->throw_exception(
776 "Recursive update is not supported over relationships of type multi ($key)"
779 elsif ($self->has_column($key)
780 && exists $self->column_info($key)->{_inflate_info})
782 $self->set_inflated_column($key, delete $upd->{$key});
786 $self->set_columns($upd);
791 my $copy = $orig->copy({ change => $to, ... });
795 =item Arguments: \%replacementdata
797 =item Returns: The Row object copy
801 Inserts a new row into the database, as a copy of the original
802 object. If a hashref of replacement data is supplied, these will take
803 precedence over data in the original.
805 If the row has related objects in a
806 L<DBIx::Class::Relationship/has_many> then those objects may be copied
807 too depending on the L<cascade_copy|DBIx::Class::Relationship>
808 relationship attribute.
813 my ($self, $changes) = @_;
815 my $col_data = { %{$self->{_column_data}} };
816 foreach my $col (keys %$col_data) {
817 delete $col_data->{$col}
818 if $self->result_source->column_info($col)->{is_auto_increment};
821 my $new = { _column_data => $col_data };
822 bless $new, ref $self;
824 $new->result_source($self->result_source);
825 $new->set_inflated_columns($changes);
828 # Its possible we'll have 2 relations to the same Source. We need to make
829 # sure we don't try to insert the same row twice esle we'll violate unique
831 my $rels_copied = {};
833 foreach my $rel ($self->result_source->relationships) {
834 my $rel_info = $self->result_source->relationship_info($rel);
836 next unless $rel_info->{attrs}{cascade_copy};
838 my $resolved = $self->result_source->resolve_condition(
839 $rel_info->{cond}, $rel, $new
842 my $copied = $rels_copied->{ $rel_info->{source} } ||= {};
843 foreach my $related ($self->search_related($rel)) {
844 my $id_str = join("\0", $related->id);
845 next if $copied->{$id_str};
846 $copied->{$id_str} = 1;
847 my $rel_copy = $related->copy($resolved);
856 $row->store_column($col => $val);
860 =item Arguments: $columnname, $value
862 =item Returns: The value sent to storage
866 Set a raw value for a column without marking it as changed. This
867 method is used internally by L</set_column> which you should probably
870 This is the lowest level at which data is set on a row object,
871 extend this method to catch all data setting methods.
876 my ($self, $column, $value) = @_;
877 $self->throw_exception( "No such column '${column}'" )
878 unless exists $self->{_column_data}{$column} || $self->has_column($column);
879 $self->throw_exception( "set_column called for ${column} without value" )
881 return $self->{_column_data}{$column} = $value;
884 =head2 inflate_result
886 Class->inflate_result($result_source, \%me, \%prefetch?)
890 =item Arguments: $result_source, \%columndata, \%prefetcheddata
892 =item Returns: A Row object
896 All L<DBIx::Class::ResultSet> methods that retrieve data from the
897 database and turn it into row objects call this method.
899 Extend this method in your Result classes to hook into this process,
900 for example to rebless the result into a different class.
902 Reblessing can also be done more easily by setting C<result_class> in
903 your Result class. See L<DBIx::Class::ResultSource/result_class>.
908 my ($class, $source, $me, $prefetch) = @_;
910 my ($source_handle) = $source;
912 if ($source->isa('DBIx::Class::ResultSourceHandle')) {
913 $source = $source_handle->resolve
915 $source_handle = $source->handle
919 _source_handle => $source_handle,
923 bless $new, (ref $class || $class);
926 foreach my $pre (keys %{$prefetch||{}}) {
927 my $pre_val = $prefetch->{$pre};
928 my $pre_source = $source->related_source($pre);
929 $class->throw_exception("Can't prefetch non-existent relationship ${pre}")
931 if (ref($pre_val->[0]) eq 'ARRAY') { # multi
933 foreach my $pre_rec (@$pre_val) {
934 unless ($pre_source->primary_columns == grep { exists $pre_rec->[0]{$_}
935 and defined $pre_rec->[0]{$_} } $pre_source->primary_columns) {
938 push(@pre_objects, $pre_source->result_class->inflate_result(
939 $pre_source, @{$pre_rec}));
941 $new->related_resultset($pre)->set_cache(\@pre_objects);
942 } elsif (defined $pre_val->[0]) {
944 unless ($pre_source->primary_columns == grep { exists $pre_val->[0]{$_}
945 and !defined $pre_val->[0]{$_} } $pre_source->primary_columns)
947 $fetched = $pre_source->result_class->inflate_result(
948 $pre_source, @{$pre_val});
950 $new->related_resultset($pre)->set_cache([ $fetched ]);
951 my $accessor = $source->relationship_info($pre)->{attrs}{accessor};
952 $class->throw_exception("No accessor for prefetched $pre")
953 unless defined $accessor;
954 if ($accessor eq 'single') {
955 $new->{_relationship_data}{$pre} = $fetched;
956 } elsif ($accessor eq 'filter') {
957 $new->{_inflated_column}{$pre} = $fetched;
959 $class->throw_exception("Prefetch not supported with accessor '$accessor'");
966 =head2 update_or_insert
968 $row->update_or_insert
972 =item Arguments: none
974 =item Returns: Result of update or insert operation
978 L</Update>s the object if it's already in the database, according to
979 L</in_storage>, else L</insert>s it.
981 =head2 insert_or_update
983 $obj->insert_or_update
985 Alias for L</update_or_insert>
989 sub insert_or_update { shift->update_or_insert(@_) }
991 sub update_or_insert {
993 return ($self->in_storage ? $self->update : $self->insert);
998 my @changed_col_names = $row->is_changed();
999 if ($row->is_changed()) { ... }
1003 =item Arguments: none
1005 =item Returns: 0|1 or @columnnames
1009 In list context returns a list of columns with uncommited changes, or
1010 in scalar context returns a true value if there are uncommitted
1016 return keys %{shift->{_dirty_columns} || {}};
1019 =head2 is_column_changed
1021 if ($row->is_column_changed('col')) { ... }
1025 =item Arguments: $columname
1031 Returns a true value if the column has uncommitted changes.
1035 sub is_column_changed {
1036 my( $self, $col ) = @_;
1037 return exists $self->{_dirty_columns}->{$col};
1040 =head2 result_source
1042 my $resultsource = $row->result_source;
1046 =item Arguments: none
1048 =item Returns: a ResultSource instance
1052 Accessor to the L<DBIx::Class::ResultSource> this object was created from.
1060 $self->_source_handle($_[0]->handle);
1062 $self->_source_handle->resolve;
1066 =head2 register_column
1068 $column_info = { .... };
1069 $class->register_column($column_name, $column_info);
1073 =item Arguments: $columnname, \%columninfo
1075 =item Returns: undefined
1079 Registers a column on the class. If the column_info has an 'accessor'
1080 key, creates an accessor named after the value if defined; if there is
1081 no such key, creates an accessor with the same name as the column
1083 The column_info attributes are described in
1084 L<DBIx::Class::ResultSource/add_columns>
1088 sub register_column {
1089 my ($class, $col, $info) = @_;
1091 if (exists $info->{accessor}) {
1092 return unless defined $info->{accessor};
1093 $acc = [ $info->{accessor}, $col ];
1095 $class->mk_group_accessors('column' => $acc);
1098 =head2 get_from_storage
1100 my $copy = $row->get_from_storage($attrs)
1104 =item Arguments: \%attrs
1106 =item Returns: A Row object
1110 Fetches a fresh copy of the Row object from the database and returns it.
1112 If passed the \%attrs argument, will first apply these attributes to
1113 the resultset used to find the row.
1115 This copy can then be used to compare to an existing row object, to
1116 determine if any changes have been made in the database since it was
1119 To just update your Row object with any latest changes from the
1120 database, use L</discard_changes> instead.
1122 The \%attrs argument should be compatible with
1123 L<DBIx::Class::ResultSet/ATTRIBUTES>.
1127 sub get_from_storage {
1128 my $self = shift @_;
1129 my $attrs = shift @_;
1130 my $resultset = $self->result_source->resultset;
1132 if(defined $attrs) {
1133 $resultset = $resultset->search(undef, $attrs);
1136 return $resultset->find($self->{_orig_ident} || $self->ident_condition);
1139 =head2 throw_exception
1141 See L<DBIx::Class::Schema/throw_exception>.
1145 sub throw_exception {
1147 if (ref $self && ref $self->result_source && $self->result_source->schema) {
1148 $self->result_source->schema->throw_exception(@_);
1160 =item Arguments: none
1162 =item Returns: A list of primary key values
1166 Returns the primary key(s) for a row. Can't be called as a class method.
1167 Actually implemented in L<DBIx::Class::PK>
1169 =head2 discard_changes
1171 $row->discard_changes
1175 =item Arguments: none
1177 =item Returns: nothing (updates object in-place)
1181 Retrieves and sets the row object data from the database, losing any
1184 This method can also be used to refresh from storage, retrieving any
1185 changes made since the row was last read from storage. Actually
1186 implemented in L<DBIx::Class::PK>
1194 Matt S. Trout <mst@shadowcatsystems.co.uk>
1198 You may distribute this code under the same terms as Perl itself.