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 foreach my $col (keys %$updated_cols) {
267 $self->store_column($col, $updated_cols->{$col});
271 my @auto_pri = grep {
272 !defined $self->get_column($_) ||
273 ref($self->get_column($_)) eq 'SCALAR'
274 } $self->primary_columns;
277 #$self->throw_exception( "More than one possible key found for auto-inc on ".ref $self )
278 # if defined $too_many;
280 my $storage = $self->result_source->storage;
281 $self->throw_exception( "Missing primary key but Storage doesn't support last_insert_id" )
282 unless $storage->can('last_insert_id');
283 my @ids = $storage->last_insert_id($self->result_source,@auto_pri);
284 $self->throw_exception( "Can't get last insert id" )
285 unless (@ids == @auto_pri);
286 $self->store_column($auto_pri[$_] => $ids[$_]) for 0 .. $#ids;
289 $self->{_dirty_columns} = {};
290 $self->{related_resultsets} = {};
292 if(!$self->{_rel_in_storage}) {
293 ## Now do the has_many rels, that need $selfs ID.
294 foreach my $relname (keys %related_stuff) {
295 my $rel_obj = $related_stuff{$relname};
297 if (Scalar::Util::blessed($rel_obj)
298 && $rel_obj->isa('DBIx::Class::Row')) {
300 } elsif (ref $rel_obj eq 'ARRAY') {
304 my $reverse = $source->reverse_relationship_info($relname);
305 foreach my $obj (@cands) {
306 $obj->set_from_related($_, $self) for keys %$reverse;
307 my $them = { %{$obj->{_relationship_data} || {} }, $obj->get_inflated_columns };
308 if ($self->__their_pk_needs_us($relname, $them)) {
309 $obj = $self->find_or_create_related($relname, $them);
316 $rollback_guard->commit;
319 $self->in_storage(1);
320 undef $self->{_orig_ident};
326 $row->in_storage; # Get value
327 $row->in_storage(1); # Set value
331 =item Arguments: none or 1|0
337 Indicates whether the object exists as a row in the database or
338 not. This is set to true when L<DBIx::Class::ResultSet/find>,
339 L<DBIx::Class::ResultSet/create> or L<DBIx::Class::ResultSet/insert>
342 Creating a row object using L<DBIx::Class::ResultSet/new>, or calling
343 L</delete> on one, sets it to false.
348 my ($self, $val) = @_;
349 $self->{_in_storage} = $val if @_ > 1;
350 return $self->{_in_storage};
355 $row->update(\%columns?)
359 =item Arguments: none or a hashref
361 =item Returns: The Row object
365 Throws an exception if the row object is not yet in the database,
366 according to L</in_storage>.
368 This method issues an SQL UPDATE query to commit any changes to the
369 object to the database if required.
371 Also takes an optional hashref of C<< column_name => value> >> pairs
372 to update on the object first. Be aware that the hashref will be
373 passed to C<set_inflated_columns>, which might edit it in place, so
374 don't rely on it being the same after a call to C<update>. If you
375 need to preserve the hashref, it is sufficient to pass a shallow copy
376 to C<update>, e.g. ( { %{ $href } } )
378 If the values passed or any of the column values set on the object
379 contain scalar references, eg:
381 $row->last_modified(\'NOW()');
383 $row->update({ last_modified => \'NOW()' });
385 The update will pass the values verbatim into SQL. (See
386 L<SQL::Abstract> docs). The values in your Row object will NOT change
387 as a result of the update call, if you want the object to be updated
388 with the actual values from the database, call L</discard_changes>
391 $row->update()->discard_changes();
393 To determine before calling this method, which column values have
394 changed and will be updated, call L</get_dirty_columns>.
396 To check if any columns will be updated, call L</is_changed>.
398 To force a column to be updated, call L</make_column_dirty> before
404 my ($self, $upd) = @_;
405 $self->throw_exception( "Not in database" ) unless $self->in_storage;
406 my $ident_cond = $self->ident_condition;
407 $self->throw_exception("Cannot safely update a row in a PK-less table")
408 if ! keys %$ident_cond;
410 $self->set_inflated_columns($upd) if $upd;
411 my %to_update = $self->get_dirty_columns;
412 return $self unless keys %to_update;
413 my $rows = $self->result_source->storage->update(
414 $self->result_source, \%to_update,
415 $self->{_orig_ident} || $ident_cond
418 $self->throw_exception( "Can't update ${self}: row not found" );
419 } elsif ($rows > 1) {
420 $self->throw_exception("Can't update ${self}: updated more than one row");
422 $self->{_dirty_columns} = {};
423 $self->{related_resultsets} = {};
424 undef $self->{_orig_ident};
434 =item Arguments: none
436 =item Returns: The Row object
440 Throws an exception if the object is not in the database according to
441 L</in_storage>. Runs an SQL DELETE statement using the primary key
442 values to locate the row.
444 The object is still perfectly usable, but L</in_storage> will
445 now return 0 and the object must be reinserted using L</insert>
446 before it can be used to L</update> the row again.
448 If you delete an object in a class with a C<has_many> relationship, an
449 attempt is made to delete all the related objects as well. To turn
450 this behaviour off, pass C<< cascade_delete => 0 >> in the C<$attr>
451 hashref of the relationship, see L<DBIx::Class::Relationship>. Any
452 database-level cascade or restrict will take precedence over a
453 DBIx-Class-based cascading delete.
455 If you delete an object within a txn_do() (see L<DBIx::Class::Storage/txn_do>)
456 and the transaction subsequently fails, the row object will remain marked as
457 not being in storage. If you know for a fact that the object is still in
458 storage (i.e. by inspecting the cause of the transaction's failure), you can
459 use C<< $obj->in_storage(1) >> to restore consistency between the object and
460 the database. This would allow a subsequent C<< $obj->delete >> to work
463 See also L<DBIx::Class::ResultSet/delete>.
470 $self->throw_exception( "Not in database" ) unless $self->in_storage;
471 my $ident_cond = $self->{_orig_ident} || $self->ident_condition;
472 $self->throw_exception("Cannot safely delete a row in a PK-less table")
473 if ! keys %$ident_cond;
474 foreach my $column (keys %$ident_cond) {
475 $self->throw_exception("Can't delete the object unless it has loaded the primary keys")
476 unless exists $self->{_column_data}{$column};
478 $self->result_source->storage->delete(
479 $self->result_source, $ident_cond);
480 $self->in_storage(undef);
482 $self->throw_exception("Can't do class delete without a ResultSource instance")
483 unless $self->can('result_source_instance');
484 my $attrs = @_ > 1 && ref $_[$#_] eq 'HASH' ? { %{pop(@_)} } : {};
485 my $query = ref $_[0] eq 'HASH' ? $_[0] : {@_};
486 $self->result_source_instance->resultset->search(@_)->delete;
493 my $val = $row->get_column($col);
497 =item Arguments: $columnname
499 =item Returns: The value of the column
503 Throws an exception if the column name given doesn't exist according
506 Returns a raw column value from the row object, if it has already
507 been fetched from the database or set by an accessor.
509 If an L<inflated value|DBIx::Class::InflateColumn> has been set, it
510 will be deflated and returned.
512 Note that if you used the C<columns> or the C<select/as>
513 L<search attributes|DBIx::Class::ResultSet/ATTRIBUTES> on the resultset from
514 which C<$row> was derived, and B<did not include> C<$columnname> in the list,
515 this method will return C<undef> even if the database contains some value.
517 To retrieve all loaded column values as a hash, use L</get_columns>.
522 my ($self, $column) = @_;
523 $self->throw_exception( "Can't fetch data as class method" ) unless ref $self;
524 return $self->{_column_data}{$column} if exists $self->{_column_data}{$column};
525 if (exists $self->{_inflated_column}{$column}) {
526 return $self->store_column($column,
527 $self->_deflated_column($column, $self->{_inflated_column}{$column}));
529 $self->throw_exception( "No such column '${column}'" ) unless $self->has_column($column);
533 =head2 has_column_loaded
535 if ( $row->has_column_loaded($col) ) {
536 print "$col has been loaded from db";
541 =item Arguments: $columnname
547 Returns a true value if the column value has been loaded from the
548 database (or set locally).
552 sub has_column_loaded {
553 my ($self, $column) = @_;
554 $self->throw_exception( "Can't call has_column data as class method" ) unless ref $self;
555 return 1 if exists $self->{_inflated_column}{$column};
556 return exists $self->{_column_data}{$column};
561 my %data = $row->get_columns;
565 =item Arguments: none
567 =item Returns: A hash of columnname, value pairs.
571 Returns all loaded column data as a hash, containing raw values. To
572 get just one value for a particular column, use L</get_column>.
578 if (exists $self->{_inflated_column}) {
579 foreach my $col (keys %{$self->{_inflated_column}}) {
580 $self->store_column($col, $self->_deflated_column($col, $self->{_inflated_column}{$col}))
581 unless exists $self->{_column_data}{$col};
584 return %{$self->{_column_data}};
587 =head2 get_dirty_columns
589 my %data = $row->get_dirty_columns;
593 =item Arguments: none
595 =item Returns: A hash of column, value pairs
599 Only returns the column, value pairs for those columns that have been
600 changed on this object since the last L</update> or L</insert> call.
602 See L</get_columns> to fetch all column/value pairs.
606 sub get_dirty_columns {
608 return map { $_ => $self->{_column_data}{$_} }
609 keys %{$self->{_dirty_columns}};
612 =head2 make_column_dirty
614 $row->make_column_dirty($col)
618 =item Arguments: $columnname
620 =item Returns: undefined
624 Throws an exception if the column does not exist.
626 Marks a column as having been changed regardless of whether it has
630 sub make_column_dirty {
631 my ($self, $column) = @_;
633 $self->throw_exception( "No such column '${column}'" )
634 unless exists $self->{_column_data}{$column} || $self->has_column($column);
635 $self->{_dirty_columns}{$column} = 1;
638 =head2 get_inflated_columns
640 my %inflated_data = $obj->get_inflated_columns;
644 =item Arguments: none
646 =item Returns: A hash of column, object|value pairs
650 Returns a hash of all column keys and associated values. Values for any
651 columns set to use inflation will be inflated and returns as objects.
653 See L</get_columns> to get the uninflated values.
655 See L<DBIx::Class::InflateColumn> for how to setup inflation.
659 sub get_inflated_columns {
662 my $accessor = $self->column_info($_)->{'accessor'} || $_;
663 ($_ => $self->$accessor);
669 $row->set_column($col => $val);
673 =item Arguments: $columnname, $value
675 =item Returns: $value
679 Sets a raw column value. If the new value is different from the old one,
680 the column is marked as dirty for when you next call L</update>.
682 If passed an object or reference as a value, this method will happily
683 attempt to store it, and a later L</insert> or L</update> will try and
684 stringify/numify as appropriate. To set an object to be deflated
685 instead, see L</set_inflated_columns>.
690 my ($self, $column, $new_value) = @_;
692 $self->{_orig_ident} ||= $self->ident_condition;
693 my $old_value = $self->get_column($column);
695 $self->store_column($column, $new_value);
696 $self->{_dirty_columns}{$column} = 1
697 if (defined $old_value xor defined $new_value) || (defined $old_value && $old_value ne $new_value);
699 # XXX clear out the relation cache for this column
700 delete $self->{related_resultsets}{$column};
707 $row->set_columns({ $col => $val, ... });
711 =item Arguments: \%columndata
713 =item Returns: The Row object
717 Sets multiple column, raw value pairs at once.
719 Works as L</set_column>.
724 my ($self,$data) = @_;
725 foreach my $col (keys %$data) {
726 $self->set_column($col,$data->{$col});
731 =head2 set_inflated_columns
733 $row->set_inflated_columns({ $col => $val, $relname => $obj, ... });
737 =item Arguments: \%columndata
739 =item Returns: The Row object
743 Sets more than one column value at once. Any inflated values are
744 deflated and the raw values stored.
746 Any related values passed as Row objects, using the relation name as a
747 key, are reduced to the appropriate foreign key values and stored. If
748 instead of related row objects, a hashref of column, value data is
749 passed, will create the related object first then store.
751 Will even accept arrayrefs of data as a value to a
752 L<DBIx::Class::Relationship/has_many> key, and create the related
753 objects if necessary.
755 Be aware that the input hashref might be edited in place, so dont rely
756 on it being the same after a call to C<set_inflated_columns>. If you
757 need to preserve the hashref, it is sufficient to pass a shallow copy
758 to C<set_inflated_columns>, e.g. ( { %{ $href } } )
760 See also L<DBIx::Class::Relationship::Base/set_from_related>.
764 sub set_inflated_columns {
765 my ( $self, $upd ) = @_;
766 foreach my $key (keys %$upd) {
767 if (ref $upd->{$key}) {
768 my $info = $self->relationship_info($key);
769 if ($info && $info->{attrs}{accessor}
770 && $info->{attrs}{accessor} eq 'single')
772 my $rel = delete $upd->{$key};
773 $self->set_from_related($key => $rel);
774 $self->{_relationship_data}{$key} = $rel;
775 } elsif ($info && $info->{attrs}{accessor}
776 && $info->{attrs}{accessor} eq 'multi') {
777 $self->throw_exception(
778 "Recursive update is not supported over relationships of type multi ($key)"
781 elsif ($self->has_column($key)
782 && exists $self->column_info($key)->{_inflate_info})
784 $self->set_inflated_column($key, delete $upd->{$key});
788 $self->set_columns($upd);
793 my $copy = $orig->copy({ change => $to, ... });
797 =item Arguments: \%replacementdata
799 =item Returns: The Row object copy
803 Inserts a new row into the database, as a copy of the original
804 object. If a hashref of replacement data is supplied, these will take
805 precedence over data in the original.
807 If the row has related objects in a
808 L<DBIx::Class::Relationship/has_many> then those objects may be copied
809 too depending on the L<cascade_copy|DBIx::Class::Relationship>
810 relationship attribute.
815 my ($self, $changes) = @_;
817 my $col_data = { %{$self->{_column_data}} };
818 foreach my $col (keys %$col_data) {
819 delete $col_data->{$col}
820 if $self->result_source->column_info($col)->{is_auto_increment};
823 my $new = { _column_data => $col_data };
824 bless $new, ref $self;
826 $new->result_source($self->result_source);
827 $new->set_inflated_columns($changes);
830 # Its possible we'll have 2 relations to the same Source. We need to make
831 # sure we don't try to insert the same row twice esle we'll violate unique
833 my $rels_copied = {};
835 foreach my $rel ($self->result_source->relationships) {
836 my $rel_info = $self->result_source->relationship_info($rel);
838 next unless $rel_info->{attrs}{cascade_copy};
840 my $resolved = $self->result_source->resolve_condition(
841 $rel_info->{cond}, $rel, $new
844 my $copied = $rels_copied->{ $rel_info->{source} } ||= {};
845 foreach my $related ($self->search_related($rel)) {
846 my $id_str = join("\0", $related->id);
847 next if $copied->{$id_str};
848 $copied->{$id_str} = 1;
849 my $rel_copy = $related->copy($resolved);
858 $row->store_column($col => $val);
862 =item Arguments: $columnname, $value
864 =item Returns: The value sent to storage
868 Set a raw value for a column without marking it as changed. This
869 method is used internally by L</set_column> which you should probably
872 This is the lowest level at which data is set on a row object,
873 extend this method to catch all data setting methods.
878 my ($self, $column, $value) = @_;
879 $self->throw_exception( "No such column '${column}'" )
880 unless exists $self->{_column_data}{$column} || $self->has_column($column);
881 $self->throw_exception( "set_column called for ${column} without value" )
883 return $self->{_column_data}{$column} = $value;
886 =head2 inflate_result
888 Class->inflate_result($result_source, \%me, \%prefetch?)
892 =item Arguments: $result_source, \%columndata, \%prefetcheddata
894 =item Returns: A Row object
898 All L<DBIx::Class::ResultSet> methods that retrieve data from the
899 database and turn it into row objects call this method.
901 Extend this method in your Result classes to hook into this process,
902 for example to rebless the result into a different class.
904 Reblessing can also be done more easily by setting C<result_class> in
905 your Result class. See L<DBIx::Class::ResultSource/result_class>.
910 my ($class, $source, $me, $prefetch) = @_;
912 my ($source_handle) = $source;
914 if ($source->isa('DBIx::Class::ResultSourceHandle')) {
915 $source = $source_handle->resolve
917 $source_handle = $source->handle
921 _source_handle => $source_handle,
925 bless $new, (ref $class || $class);
928 foreach my $pre (keys %{$prefetch||{}}) {
929 my $pre_val = $prefetch->{$pre};
930 my $pre_source = $source->related_source($pre);
931 $class->throw_exception("Can't prefetch non-existent relationship ${pre}")
933 if (ref($pre_val->[0]) eq 'ARRAY') { # multi
935 foreach my $pre_rec (@$pre_val) {
936 unless ($pre_source->primary_columns == grep { exists $pre_rec->[0]{$_}
937 and defined $pre_rec->[0]{$_} } $pre_source->primary_columns) {
940 push(@pre_objects, $pre_source->result_class->inflate_result(
941 $pre_source, @{$pre_rec}));
943 $new->related_resultset($pre)->set_cache(\@pre_objects);
944 } elsif (defined $pre_val->[0]) {
946 unless ($pre_source->primary_columns == grep { exists $pre_val->[0]{$_}
947 and !defined $pre_val->[0]{$_} } $pre_source->primary_columns)
949 $fetched = $pre_source->result_class->inflate_result(
950 $pre_source, @{$pre_val});
952 $new->related_resultset($pre)->set_cache([ $fetched ]);
953 my $accessor = $source->relationship_info($pre)->{attrs}{accessor};
954 $class->throw_exception("No accessor for prefetched $pre")
955 unless defined $accessor;
956 if ($accessor eq 'single') {
957 $new->{_relationship_data}{$pre} = $fetched;
958 } elsif ($accessor eq 'filter') {
959 $new->{_inflated_column}{$pre} = $fetched;
961 $class->throw_exception("Prefetch not supported with accessor '$accessor'");
968 =head2 update_or_insert
970 $row->update_or_insert
974 =item Arguments: none
976 =item Returns: Result of update or insert operation
980 L</Update>s the object if it's already in the database, according to
981 L</in_storage>, else L</insert>s it.
983 =head2 insert_or_update
985 $obj->insert_or_update
987 Alias for L</update_or_insert>
991 sub insert_or_update { shift->update_or_insert(@_) }
993 sub update_or_insert {
995 return ($self->in_storage ? $self->update : $self->insert);
1000 my @changed_col_names = $row->is_changed();
1001 if ($row->is_changed()) { ... }
1005 =item Arguments: none
1007 =item Returns: 0|1 or @columnnames
1011 In list context returns a list of columns with uncommited changes, or
1012 in scalar context returns a true value if there are uncommitted
1018 return keys %{shift->{_dirty_columns} || {}};
1021 =head2 is_column_changed
1023 if ($row->is_column_changed('col')) { ... }
1027 =item Arguments: $columname
1033 Returns a true value if the column has uncommitted changes.
1037 sub is_column_changed {
1038 my( $self, $col ) = @_;
1039 return exists $self->{_dirty_columns}->{$col};
1042 =head2 result_source
1044 my $resultsource = $row->result_source;
1048 =item Arguments: none
1050 =item Returns: a ResultSource instance
1054 Accessor to the L<DBIx::Class::ResultSource> this object was created from.
1062 $self->_source_handle($_[0]->handle);
1064 $self->_source_handle->resolve;
1068 =head2 register_column
1070 $column_info = { .... };
1071 $class->register_column($column_name, $column_info);
1075 =item Arguments: $columnname, \%columninfo
1077 =item Returns: undefined
1081 Registers a column on the class. If the column_info has an 'accessor'
1082 key, creates an accessor named after the value if defined; if there is
1083 no such key, creates an accessor with the same name as the column
1085 The column_info attributes are described in
1086 L<DBIx::Class::ResultSource/add_columns>
1090 sub register_column {
1091 my ($class, $col, $info) = @_;
1093 if (exists $info->{accessor}) {
1094 return unless defined $info->{accessor};
1095 $acc = [ $info->{accessor}, $col ];
1097 $class->mk_group_accessors('column' => $acc);
1100 =head2 get_from_storage
1102 my $copy = $row->get_from_storage($attrs)
1106 =item Arguments: \%attrs
1108 =item Returns: A Row object
1112 Fetches a fresh copy of the Row object from the database and returns it.
1114 If passed the \%attrs argument, will first apply these attributes to
1115 the resultset used to find the row.
1117 This copy can then be used to compare to an existing row object, to
1118 determine if any changes have been made in the database since it was
1121 To just update your Row object with any latest changes from the
1122 database, use L</discard_changes> instead.
1124 The \%attrs argument should be compatible with
1125 L<DBIx::Class::ResultSet/ATTRIBUTES>.
1129 sub get_from_storage {
1130 my $self = shift @_;
1131 my $attrs = shift @_;
1132 my $resultset = $self->result_source->resultset;
1134 if(defined $attrs) {
1135 $resultset = $resultset->search(undef, $attrs);
1138 return $resultset->find($self->{_orig_ident} || $self->ident_condition);
1141 =head2 throw_exception
1143 See L<DBIx::Class::Schema/throw_exception>.
1147 sub throw_exception {
1149 if (ref $self && ref $self->result_source && $self->result_source->schema) {
1150 $self->result_source->schema->throw_exception(@_);
1162 =item Arguments: none
1164 =item Returns: A list of primary key values
1168 Returns the primary key(s) for a row. Can't be called as a class method.
1169 Actually implemented in L<DBIx::Class::PK>
1171 =head2 discard_changes
1173 $row->discard_changes
1177 =item Arguments: none
1179 =item Returns: nothing (updates object in-place)
1183 Retrieves and sets the row object data from the database, losing any
1186 This method can also be used to refresh from storage, retrieving any
1187 changes made since the row was last read from storage. Actually
1188 implemented in L<DBIx::Class::PK>
1196 Matt S. Trout <mst@shadowcatsystems.co.uk>
1200 You may distribute this code under the same terms as Perl itself.