use warnings;
use base qw/DBIx::Class/;
-use Carp::Clan qw/^DBIx::Class/;
+
+use DBIx::Class::Exception;
use Scalar::Util ();
-use Scope::Guard;
###
### Internal method
For a more involved explanation, see L<DBIx::Class::ResultSet/create>.
+Please note that if a value is not passed to new, no value will be sent
+in the SQL INSERT call, and the column will therefore assume whatever
+default value was specified in your database. While DBIC will retrieve the
+value of autoincrement columns, it will never make an explicit database
+trip to retrieve default values assigned by the RDBMS. You can explicitly
+request that all values be fetched back from the database by calling
+L</discard_changes>, or you can supply an explicit C<undef> to columns
+with NULL as the default, and save yourself a SELECT.
+
+ CAVEAT:
+
+ The behavior described above will backfire if you use a foreign key column
+ with a database-defined default. If you call the relationship accessor on
+ an object that doesn't have a set value for the FK column, DBIC will throw
+ an exception, as it has no way of knowing the PK of the related object (if
+ there is one).
+
=cut
## 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().
->resultset
->new_result($data);
}
- if ($self->result_source->pk_depends_on($relname, $data)) {
+ if ($self->result_source->_pk_depends_on($relname, $data)) {
MULTICREATE_DEBUG and warn "MC $self constructing $relname via find_or_new";
return $self->result_source
->related_source($relname)
foreach my $key (keys %$reverse) {
# if their primary key depends on us, then we have to
# just create a result and we'll fill it out afterwards
- return 1 if $rel_source->pk_depends_on($key, $us);
+ return 1 if $rel_source->_pk_depends_on($key, $us);
}
return 0;
}
$new->result_source($source);
}
- if (my $related = delete $attrs->{-from_resultset}) {
+ if (my $related = delete $attrs->{-cols_from_relations}) {
@{$new->{_ignore_at_insert}={}}{@$related} = ();
}
if ($attrs) {
$new->throw_exception("attrs must be a hashref")
unless ref($attrs) eq 'HASH';
-
+
my ($related,$inflated);
- ## Pretend all the rels are actual objects, unset below if not, for insert() to fix
- $new->{_rel_in_storage} = 1;
foreach my $key (keys %$attrs) {
if (ref $attrs->{$key}) {
## Can we extract this lot to use with update(_or .. ) ?
- confess "Can't do multi-create without result source" unless $source;
+ $new->throw_exception("Can't do multi-create without result source")
+ unless $source;
my $info = $source->relationship_info($key);
- if ($info && $info->{attrs}{accessor}
- && $info->{attrs}{accessor} eq 'single')
- {
+ my $acc_type = $info->{attrs}{accessor} || '';
+ if ($acc_type eq 'single') {
my $rel_obj = delete $attrs->{$key};
if(!Scalar::Util::blessed($rel_obj)) {
$rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
}
if ($rel_obj->in_storage) {
+ $new->{_rel_in_storage}{$key} = 1;
$new->set_from_related($key, $rel_obj);
} else {
- $new->{_rel_in_storage} = 0;
MULTICREATE_DEBUG and warn "MC $new uninserted $key $rel_obj\n";
}
$related->{$key} = $rel_obj;
next;
- } elsif ($info && $info->{attrs}{accessor}
- && $info->{attrs}{accessor} eq 'multi'
- && ref $attrs->{$key} eq 'ARRAY') {
+ }
+ elsif ($acc_type eq 'multi' && ref $attrs->{$key} eq 'ARRAY' ) {
my $others = delete $attrs->{$key};
my $total = @$others;
my @objects;
}
if ($rel_obj->in_storage) {
- $new->set_from_related($key, $rel_obj);
+ $rel_obj->throw_exception ('A multi relationship can not be pre-existing when doing multicreate. Something went wrong');
} else {
- $new->{_rel_in_storage} = 0;
MULTICREATE_DEBUG and
warn "MC $new uninserted $key $rel_obj (${\($idx+1)} of $total)\n";
}
- $new->set_from_related($key, $rel_obj) if $rel_obj->in_storage;
push(@objects, $rel_obj);
}
$related->{$key} = \@objects;
next;
- } elsif ($info && $info->{attrs}{accessor}
- && $info->{attrs}{accessor} eq 'filter')
- {
+ }
+ elsif ($acc_type eq 'filter') {
## 'filter' should disappear and get merged in with 'single' above!
my $rel_obj = delete $attrs->{$key};
if(!Scalar::Util::blessed($rel_obj)) {
$rel_obj = $new->__new_related_find_or_new_helper($key, $rel_obj);
}
- unless ($rel_obj->in_storage) {
- $new->{_rel_in_storage} = 0;
+ if ($rel_obj->in_storage) {
+ $new->{_rel_in_storage}{$key} = 1;
+ }
+ else {
MULTICREATE_DEBUG and warn "MC $new uninserted $key $rel_obj";
}
$inflated->{$key} = $rel_obj;
}
$new->throw_exception("No such column $key on $class")
unless $class->has_column($key);
- $new->store_column($key => $attrs->{$key});
+ $new->store_column($key => $attrs->{$key});
}
$new->{_relationship_data} = $related if $related;
my $rollback_guard;
# Check if we stored uninserted relobjs here in new()
- my %related_stuff = (%{$self->{_relationship_data} || {}},
+ my %related_stuff = (%{$self->{_relationship_data} || {}},
%{$self->{_inflated_column} || {}});
- if(!$self->{_rel_in_storage}) {
-
- # The guard will save us if we blow out of this scope via die
- $rollback_guard = $source->storage->txn_scope_guard;
-
- ## Should all be in relationship_data, but we need to get rid of the
- ## 'filter' reltype..
- ## These are the FK rels, need their IDs for the insert.
-
- my @pri = $self->primary_columns;
+ # insert what needs to be inserted before us
+ my %pre_insert;
+ for my $relname (keys %related_stuff) {
+ my $rel_obj = $related_stuff{$relname};
- REL: foreach my $relname (keys %related_stuff) {
+ if (! $self->{_rel_in_storage}{$relname}) {
+ next unless (Scalar::Util::blessed($rel_obj)
+ && $rel_obj->isa('DBIx::Class::Row'));
- my $rel_obj = $related_stuff{$relname};
+ next unless $source->_pk_depends_on(
+ $relname, { $rel_obj->get_columns }
+ );
- next REL unless (Scalar::Util::blessed($rel_obj)
- && $rel_obj->isa('DBIx::Class::Row'));
-
- next REL unless $source->pk_depends_on(
- $relname, { $rel_obj->get_columns }
- );
+ # The guard will save us if we blow out of this scope via die
+ $rollback_guard ||= $source->storage->txn_scope_guard;
MULTICREATE_DEBUG and warn "MC $self pre-reconstructing $relname $rel_obj\n";
->related_source($relname)
->resultset
->find_or_create($them);
+
%{$rel_obj} = %{$re};
- $self->set_from_related($relname, $rel_obj);
- delete $related_stuff{$relname};
+ $self->{_rel_in_storage}{$relname} = 1;
}
+
+ $self->set_from_related($relname, $rel_obj);
+ delete $related_stuff{$relname};
+ }
+
+ # start a transaction here if not started yet and there is more stuff
+ # to insert after us
+ if (keys %related_stuff) {
+ $rollback_guard ||= $source->storage->txn_scope_guard
}
MULTICREATE_DEBUG and do {
## PK::Auto
my @auto_pri = grep {
- !defined $self->get_column($_) ||
- ref($self->get_column($_)) eq 'SCALAR'
+ (not defined $self->get_column($_))
+ ||
+ (ref($self->get_column($_)) eq 'SCALAR')
} $self->primary_columns;
if (@auto_pri) {
- #$self->throw_exception( "More than one possible key found for auto-inc on ".ref $self )
- # if defined $too_many;
MULTICREATE_DEBUG and warn "MC $self fetching missing PKs ".join(', ', @auto_pri)."\n";
my $storage = $self->result_source->storage;
$self->throw_exception( "Missing primary key but Storage doesn't support last_insert_id" )
$self->throw_exception( "Can't get last insert id" )
unless (@ids == @auto_pri);
$self->store_column($auto_pri[$_] => $ids[$_]) for 0 .. $#ids;
-#use Data::Dumper; warn Dumper($self);
}
$self->{_dirty_columns} = {};
$self->{related_resultsets} = {};
- if(!$self->{_rel_in_storage}) {
- ## Now do the relationships that need our ID (has_many etc.)
- foreach my $relname (keys %related_stuff) {
- my $rel_obj = $related_stuff{$relname};
- my @cands;
- if (Scalar::Util::blessed($rel_obj)
- && $rel_obj->isa('DBIx::Class::Row')) {
- @cands = ($rel_obj);
- } elsif (ref $rel_obj eq 'ARRAY') {
- @cands = @$rel_obj;
- }
- if (@cands) {
- my $reverse = $source->reverse_relationship_info($relname);
- foreach my $obj (@cands) {
- $obj->set_from_related($_, $self) for keys %$reverse;
- my $them = { %{$obj->{_relationship_data} || {} }, $obj->get_inflated_columns };
- if ($self->__their_pk_needs_us($relname, $them)) {
- if (exists $self->{_ignore_at_insert}{$relname}) {
- MULTICREATE_DEBUG and warn "MC $self skipping post-insert on $relname";
- } else {
- MULTICREATE_DEBUG and warn "MC $self re-creating $relname $obj";
- my $re = $self->result_source
- ->related_source($relname)
- ->resultset
- ->find_or_create($them);
- %{$obj} = %{$re};
- MULTICREATE_DEBUG and warn "MC $self new $relname $obj";
- }
+ foreach my $relname (keys %related_stuff) {
+ next unless $source->has_relationship ($relname);
+
+ my @cands = ref $related_stuff{$relname} eq 'ARRAY'
+ ? @{$related_stuff{$relname}}
+ : $related_stuff{$relname}
+ ;
+
+ if (@cands
+ && Scalar::Util::blessed($cands[0])
+ && $cands[0]->isa('DBIx::Class::Row')
+ ) {
+ my $reverse = $source->reverse_relationship_info($relname);
+ foreach my $obj (@cands) {
+ $obj->set_from_related($_, $self) for keys %$reverse;
+ my $them = { %{$obj->{_relationship_data} || {} }, $obj->get_inflated_columns };
+ if ($self->__their_pk_needs_us($relname, $them)) {
+ if (exists $self->{_ignore_at_insert}{$relname}) {
+ MULTICREATE_DEBUG and warn "MC $self skipping post-insert on $relname";
} else {
- MULTICREATE_DEBUG and warn "MC $self post-inserting $obj";
- $obj->insert();
+ MULTICREATE_DEBUG and warn "MC $self re-creating $relname $obj";
+ my $re = $self->result_source
+ ->related_source($relname)
+ ->resultset
+ ->create($them);
+ %{$obj} = %{$re};
+ MULTICREATE_DEBUG and warn "MC $self new $relname $obj";
}
+ } else {
+ MULTICREATE_DEBUG and warn "MC $self post-inserting $obj";
+ $obj->insert();
}
}
}
- delete $self->{_ignore_at_insert};
- $rollback_guard->commit;
}
$self->in_storage(1);
- undef $self->{_orig_ident};
+ delete $self->{_orig_ident};
+ delete $self->{_ignore_at_insert};
+ $rollback_guard->commit if $rollback_guard;
+
return $self;
}
Indicates whether the object exists as a row in the database or
not. This is set to true when L<DBIx::Class::ResultSet/find>,
L<DBIx::Class::ResultSet/create> or L<DBIx::Class::ResultSet/insert>
-are used.
+are used.
Creating a row object using L<DBIx::Class::ResultSet/new>, or calling
L</delete> on one, sets it to false.
sub in_storage {
my ($self, $val) = @_;
$self->{_in_storage} = $val if @_ > 1;
- return $self->{_in_storage};
+ return $self->{_in_storage} ? 1 : 0;
}
=head2 update
to C<update>, e.g. ( { %{ $href } } )
If the values passed or any of the column values set on the object
-contain scalar references, eg:
+contain scalar references, e.g.:
$row->last_modified(\'NOW()');
# OR
The object is still perfectly usable, but L</in_storage> will
now return 0 and the object must be reinserted using L</insert>
-before it can be used to L</update> the row again.
+before it can be used to L</update> the row again.
If you delete an object in a class with a C<has_many> relationship, an
attempt is made to delete all the related objects as well. To turn
this behaviour off, pass C<< cascade_delete => 0 >> in the C<$attr>
hashref of the relationship, see L<DBIx::Class::Relationship>. Any
database-level cascade or restrict will take precedence over a
-DBIx-Class-based cascading delete.
+DBIx-Class-based cascading delete, since DBIx-Class B<deletes the
+main row first> and only then attempts to delete any remaining related
+rows.
If you delete an object within a txn_do() (see L<DBIx::Class::Storage/txn_do>)
and the transaction subsequently fails, the row object will remain marked as
return $self->{_column_data}{$column} if exists $self->{_column_data}{$column};
if (exists $self->{_inflated_column}{$column}) {
return $self->store_column($column,
- $self->_deflated_column($column, $self->{_inflated_column}{$column}));
+ $self->_deflated_column($column, $self->{_inflated_column}{$column}));
}
$self->throw_exception( "No such column '${column}'" ) unless $self->has_column($column);
return undef;
Returns all loaded column data as a hash, containing raw values. To
get just one value for a particular column, use L</get_column>.
+See L</get_inflated_columns> to get the inflated values.
+
=cut
sub get_columns {
Throws an exception if the column does not exist.
Marks a column as having been changed regardless of whether it has
-really changed.
+really changed.
=cut
sub make_column_dirty {
$self->throw_exception( "No such column '${column}'" )
unless exists $self->{_column_data}{$column} || $self->has_column($column);
+
+ # the entire clean/dirty code relies on exists, not on true/false
+ return 1 if exists $self->{_dirty_columns}{$column};
+
$self->{_dirty_columns}{$column} = 1;
+
+ # if we are just now making the column dirty, and if there is an inflated
+ # value, force it over the deflated one
+ if (exists $self->{_inflated_column}{$column}) {
+ $self->store_column($column,
+ $self->_deflated_column(
+ $column, $self->{_inflated_column}{$column}
+ )
+ );
+ }
}
=head2 get_inflated_columns
sub get_inflated_columns {
my $self = shift;
- return map {
- my $accessor = $self->column_info($_)->{'accessor'} || $_;
- ($_ => $self->$accessor);
- } grep $self->has_column_loaded($_), $self->columns;
+
+ my %loaded_colinfo = (map
+ { $_ => $self->column_info($_) }
+ (grep { $self->has_column_loaded($_) } $self->columns)
+ );
+
+ my %inflated;
+ for my $col (keys %loaded_colinfo) {
+ if (exists $loaded_colinfo{$col}{accessor}) {
+ my $acc = $loaded_colinfo{$col}{accessor};
+ $inflated{$col} = $self->$acc if defined $acc;
+ }
+ else {
+ $inflated{$col} = $self->$col;
+ }
+ }
+
+ # return all loaded columns with the inflations overlayed on top
+ return ($self->get_columns, %inflated);
+}
+
+sub _is_column_numeric {
+ my ($self, $column) = @_;
+ my $colinfo = $self->column_info ($column);
+
+ # cache for speed (the object may *not* have a resultsource instance)
+ if (not defined $colinfo->{is_numeric} && $self->_source_handle) {
+ $colinfo->{is_numeric} =
+ $self->result_source->schema->storage->is_datatype_numeric ($colinfo->{data_type})
+ ? 1
+ : 0
+ ;
+ }
+
+ return $colinfo->{is_numeric};
}
=head2 set_column
$self->{_orig_ident} ||= $self->ident_condition;
my $old_value = $self->get_column($column);
- $self->store_column($column, $new_value);
- $self->{_dirty_columns}{$column} = 1
- if (defined $old_value xor defined $new_value) || (defined $old_value && $old_value ne $new_value);
+ $new_value = $self->store_column($column, $new_value);
+
+ my $dirty;
+ if (!$self->in_storage) { # no point tracking dirtyness on uninserted data
+ $dirty = 1;
+ }
+ elsif (defined $old_value xor defined $new_value) {
+ $dirty = 1;
+ }
+ elsif (not defined $old_value) { # both undef
+ $dirty = 0;
+ }
+ elsif ($old_value eq $new_value) {
+ $dirty = 0;
+ }
+ else { # do a numeric comparison if datatype allows it
+ if ($self->_is_column_numeric($column)) {
+ $dirty = $old_value != $new_value;
+ }
+ else {
+ $dirty = 1;
+ }
+ }
+
+ # sadly the update code just checks for keys, not for their value
+ $self->{_dirty_columns}{$column} = 1 if $dirty;
# XXX clear out the relation cache for this column
delete $self->{related_resultsets}{$column};
$row->set_columns({ $col => $val, ... });
-=over
+=over
=item Arguments: \%columndata
=back
Sets more than one column value at once. Any inflated values are
-deflated and the raw values stored.
+deflated and the raw values stored.
Any related values passed as Row objects, using the relation name as a
key, are reduced to the appropriate foreign key values and stored. If
L<DBIx::Class::Relationship/has_many> key, and create the related
objects if necessary.
-Be aware that the input hashref might be edited in place, so dont rely
+Be aware that the input hashref might be edited in place, so don't rely
on it being the same after a call to C<set_inflated_columns>. If you
need to preserve the hashref, it is sufficient to pass a shallow copy
to C<set_inflated_columns>, e.g. ( { %{ $href } } )
foreach my $key (keys %$upd) {
if (ref $upd->{$key}) {
my $info = $self->relationship_info($key);
- if ($info && $info->{attrs}{accessor}
- && $info->{attrs}{accessor} eq 'single')
- {
+ my $acc_type = $info->{attrs}{accessor} || '';
+ if ($acc_type eq 'single') {
my $rel = delete $upd->{$key};
$self->set_from_related($key => $rel);
$self->{_relationship_data}{$key} = $rel;
- } elsif ($info && $info->{attrs}{accessor}
- && $info->{attrs}{accessor} eq 'multi') {
- $self->throw_exception(
- "Recursive update is not supported over relationships of type multi ($key)"
- );
}
- elsif ($self->has_column($key)
- && exists $self->column_info($key)->{_inflate_info})
- {
+ elsif ($acc_type eq 'multi') {
+ $self->throw_exception(
+ "Recursive update is not supported over relationships of type '$acc_type' ($key)"
+ );
+ }
+ elsif ($self->has_column($key) && exists $self->column_info($key)->{_inflate_info}) {
$self->set_inflated_column($key, delete $upd->{$key});
}
}
}
- $self->set_columns($upd);
+ $self->set_columns($upd);
}
=head2 copy
Inserts a new row into the database, as a copy of the original
object. If a hashref of replacement data is supplied, these will take
-precedence over data in the original.
+precedence over data in the original. Also any columns which have
+the L<column info attribute|DBIx::Class::ResultSource/add_columns>
+C<< is_auto_increment => 1 >> are explicitly removed before the copy,
+so that the database can insert its own autoincremented values into
+the new object.
-If the row has related objects in a
-L<DBIx::Class::Relationship/has_many> then those objects may be copied
-too depending on the L<cascade_copy|DBIx::Class::Relationship>
-relationship attribute.
+Relationships will be followed by the copy procedure B<only> if the
+relationship specifies a true value for its
+L<cascade_copy|DBIx::Class::Relationship::Base> attribute. C<cascade_copy>
+is set by default on C<has_many> relationships and unset on all others.
=cut
$new->set_inflated_columns($changes);
$new->insert;
- # Its possible we'll have 2 relations to the same Source. We need to make
- # sure we don't try to insert the same row twice esle we'll violate unique
+ # Its possible we'll have 2 relations to the same Source. We need to make
+ # sure we don't try to insert the same row twice else we'll violate unique
# constraints
my $rels_copied = {};
my $rel_info = $self->result_source->relationship_info($rel);
next unless $rel_info->{attrs}{cascade_copy};
-
- my $resolved = $self->result_source->resolve_condition(
+
+ my $resolved = $self->result_source->_resolve_condition(
$rel_info->{cond}, $rel, $new
);
$copied->{$id_str} = 1;
my $rel_copy = $related->copy($resolved);
}
-
+
}
return $new;
}
Reblessing can also be done more easily by setting C<result_class> in
your Result class. See L<DBIx::Class::ResultSource/result_class>.
+Different types of results can also be created from a particular
+L<DBIx::Class::ResultSet>, see L<DBIx::Class::ResultSet/result_class>.
+
=cut
sub inflate_result {
my ($source_handle) = $source;
if ($source->isa('DBIx::Class::ResultSourceHandle')) {
- $source = $source_handle->resolve
- } else {
- $source_handle = $source->handle
+ $source = $source_handle->resolve
+ }
+ else {
+ $source_handle = $source->handle
}
my $new = {
_source_handle => $source_handle,
_column_data => $me,
- _in_storage => 1
};
bless $new, (ref $class || $class);
- my $schema;
foreach my $pre (keys %{$prefetch||{}}) {
- my $pre_val = $prefetch->{$pre};
- my $pre_source = $source->related_source($pre);
- $class->throw_exception("Can't prefetch non-existent relationship ${pre}")
- unless $pre_source;
- if (ref($pre_val->[0]) eq 'ARRAY') { # multi
- my @pre_objects;
- foreach my $pre_rec (@$pre_val) {
- unless ($pre_source->primary_columns == grep { exists $pre_rec->[0]{$_}
- and defined $pre_rec->[0]{$_} } $pre_source->primary_columns) {
- next;
+
+ my $pre_source = $source->related_source($pre)
+ or $class->throw_exception("Can't prefetch non-existent relationship ${pre}");
+
+ my $accessor = $source->relationship_info($pre)->{attrs}{accessor}
+ or $class->throw_exception("No accessor for prefetched $pre");
+
+ my @pre_vals;
+ if (ref $prefetch->{$pre}[0] eq 'ARRAY') {
+ @pre_vals = @{$prefetch->{$pre}};
+ }
+ elsif ($accessor eq 'multi') {
+ $class->throw_exception("Implicit prefetch (via select/columns) not supported with accessor 'multi'");
+ }
+ else {
+ @pre_vals = $prefetch->{$pre};
+ }
+
+ my @pre_objects;
+ for my $me_pref (@pre_vals) {
+
+ # FIXME - this should not be necessary
+ # the collapser currently *could* return bogus elements with all
+ # columns set to undef
+ my $has_def;
+ for (values %{$me_pref->[0]}) {
+ if (defined $_) {
+ $has_def++;
+ last;
+ }
}
- push(@pre_objects, $pre_source->result_class->inflate_result(
- $pre_source, @{$pre_rec}));
- }
- $new->related_resultset($pre)->set_cache(\@pre_objects);
- } elsif (defined $pre_val->[0]) {
- my $fetched;
- unless ($pre_source->primary_columns == grep { exists $pre_val->[0]{$_}
- and !defined $pre_val->[0]{$_} } $pre_source->primary_columns)
- {
- $fetched = $pre_source->result_class->inflate_result(
- $pre_source, @{$pre_val});
- }
- $new->related_resultset($pre)->set_cache([ $fetched ]);
- my $accessor = $source->relationship_info($pre)->{attrs}{accessor};
- $class->throw_exception("No accessor for prefetched $pre")
- unless defined $accessor;
- if ($accessor eq 'single') {
- $new->{_relationship_data}{$pre} = $fetched;
- } elsif ($accessor eq 'filter') {
- $new->{_inflated_column}{$pre} = $fetched;
- } else {
- $class->throw_exception("Prefetch not supported with accessor '$accessor'");
- }
+ next unless $has_def;
+
+ push @pre_objects, $pre_source->result_class->inflate_result(
+ $pre_source, @$me_pref
+ );
+ }
+
+ if ($accessor eq 'single') {
+ $new->{_relationship_data}{$pre} = $pre_objects[0];
}
+ elsif ($accessor eq 'filter') {
+ $new->{_inflated_column}{$pre} = $pre_objects[0];
+ }
+
+ $new->related_resultset($pre)->set_cache(\@pre_objects);
}
+
+ $new->in_storage (1);
return $new;
}
my $self = shift @_;
my $attrs = shift @_;
my $resultset = $self->result_source->resultset;
-
+
if(defined $attrs) {
- $resultset = $resultset->search(undef, $attrs);
+ $resultset = $resultset->search(undef, $attrs);
}
-
+
return $resultset->find($self->{_orig_ident} || $self->ident_condition);
}
+=head2 discard_changes ($attrs)
+
+Re-selects the row from the database, losing any changes that had
+been made.
+
+This method can also be used to refresh from storage, retrieving any
+changes made since the row was last read from storage.
+
+$attrs is expected to be a hashref of attributes suitable for passing as the
+second argument to $resultset->search($cond, $attrs);
+
+=cut
+
+sub discard_changes {
+ my ($self, $attrs) = @_;
+ delete $self->{_dirty_columns};
+ return unless $self->in_storage; # Don't reload if we aren't real!
+
+ # add a replication default to read from the master only
+ $attrs = { force_pool => 'master', %{$attrs||{}} };
+
+ if( my $current_storage = $self->get_from_storage($attrs)) {
+
+ # Set $self to the current.
+ %$self = %$current_storage;
+
+ # Avoid a possible infinite loop with
+ # sub DESTROY { $_[0]->discard_changes }
+ bless $current_storage, 'Do::Not::Exist';
+
+ return $self;
+ }
+ else {
+ $self->in_storage(0);
+ return $self;
+ }
+}
+
+
=head2 throw_exception
See L<DBIx::Class::Schema/throw_exception>.
sub throw_exception {
my $self=shift;
+
if (ref $self && ref $self->result_source && $self->result_source->schema) {
- $self->result_source->schema->throw_exception(@_);
- } else {
- croak(@_);
+ $self->result_source->schema->throw_exception(@_)
+ }
+ else {
+ DBIx::Class::Exception->throw(@_);
}
}
changes made since the row was last read from storage. Actually
implemented in L<DBIx::Class::PK>
+Note: If you are using L<DBIx::Class::Storage::DBI::Replicated> as your
+storage, please kept in mind that if you L</discard_changes> on a row that you
+just updated or created, you should wrap the entire bit inside a transaction.
+Otherwise you run the risk that you insert or update to the master database
+but read from a replicant database that has not yet been updated from the
+master. This will result in unexpected results.
+
=cut
1;
projects / dbsrgits/DBIx-Class.git / blobdiff