=cut
sub search_related {
- my ($self, $rel, @rest) = @_;
- my $rel_obj = $self->result_source->relationship_info($rel);
- $self->throw_exception(
- "No such relationship ${rel} in search_related")
- unless $rel_obj;
- my $rs = $self->search(undef, { join => $rel });
- my $alias = ($rs->{attrs}{seen_join}{$rel} > 1
- ? join('_', $rel, $rs->{attrs}{seen_join}{$rel})
- : $rel);
- return $self->result_source->schema->resultset($rel_obj->{class}
- )->search( undef,
- { %{$rs->{attrs}},
- alias => $alias,
- select => undef(),
- as => undef() }
- )->search(@rest);
+ return shift->related_resultset(shift)->search(@_);
}
=head2 cursor
sub next {
my ($self) = @_;
+ my $cache = $self->get_cache;
+ if( @$cache ) {
+ $self->{all_cache_position} ||= 0;
+ my $obj = $cache->[$self->{all_cache_position}];
+ $self->{all_cache_position}++;
+ return $obj;
+ }
my @row = $self->cursor->next;
# warn Dumper(\@row); use Data::Dumper;
return unless (@row);
sub _construct_object {
my ($self, @row) = @_;
+ my @row_orig = @row; # copy @row for key comparison later, because @row will change
my @as = @{ $self->{attrs}{as} };
#warn "@cols -> @row";
my $info = [ {}, {} ];
foreach my $as (@as) {
+ my $rs = $self;
my $target = $info;
my @parts = split(/\./, $as);
my $col = pop(@parts);
foreach my $p (@parts) {
$target = $target->[1]->{$p} ||= [];
+
+ # if cache is enabled, fetch inflated objs for prefetch
+ if( $rs->{attrs}->{cache} ) {
+ my $rel_info = $rs->result_source->relationship_info($p);
+ my $cond = $rel_info->{cond};
+ my $parent_rs = $rs;
+ $rs = $rs->related_resultset($p);
+ $rs->{attrs}->{cache} = 1;
+ my @objs = ();
+
+ # populate related resultset's cache if empty
+ if( !@{ $rs->get_cache } ) {
+ $rs->all;
+ }
+
+ # get ordinals for pk columns in $row, so values can be compared
+ my $map = {};
+ keys %$cond;
+ my $re = qr/^\w+\./;
+ while( my( $rel_key, $pk ) = ( each %$cond ) ) {
+ $rel_key =~ s/$re//;
+ $pk =~ s/$re//;
+ $map->{$rel_key} = $pk;
+ } #die Dumper $map;
+
+ keys %$map;
+ while( my( $rel_key, $pk ) = each( %$map ) ) {
+ my $i = 0;
+ foreach my $col ( $parent_rs->result_source->columns ) {
+ if( $col eq $pk ) {
+ $map->{$rel_key} = $i;
+ }
+ $i++;
+ }
+ } #die Dumper $map;
+
+ $rs->reset(); # reset cursor/cache position
+
+ # get matching objects for inflation
+ OBJ: while( my $rel_obj = $rs->next ) {
+ keys %$map;
+ KEYS: while( my( $rel_key, $ordinal ) = each %$map ) {
+ # use get_column to avoid auto inflation (want scalar value)
+ if( $rel_obj->get_column($rel_key) ne $row_orig[$ordinal] ) {
+ next OBJ;
+ }
+ push @objs, $rel_obj;
+ }
+ }
+ $target->[0] = \@objs;
+ }
}
- $target->[0]->{$col} = shift @row;
+ $target->[0]->{$col} = shift @row
+ if ref($target->[0]) ne 'ARRAY'; # arrayref is pre-inflated objects, do not overwrite
}
#use Data::Dumper; warn Dumper(\@as, $info);
my $new = $self->result_source->result_class->inflate_result(
my $self = shift;
return $self->search(@_)->count if @_ && defined $_[0];
unless (defined $self->{count}) {
+ return scalar @{ $self->get_cache }
+ if @{ $self->get_cache };
my $group_by;
my $select = { 'count' => '*' };
if( $group_by = delete $self->{attrs}{group_by} ) {
sub all {
my ($self) = @_;
+ return @{ $self->get_cache }
+ if @{ $self->get_cache };
+ if( $self->{attrs}->{cache} ) {
+ my @obj = map { $self->_construct_object(@$_); }
+ $self->cursor->all;
+ $self->set_cache( \@obj );
+ return @{ $self->get_cache };
+ }
return map { $self->_construct_object(@$_); }
$self->cursor->all;
}
sub reset {
my ($self) = @_;
+ $self->{all_cache_position} = 0;
$self->cursor->reset;
return $self;
}
return $row;
}
+=head2 get_cache
+
+Gets the contents of the cache for the resultset.
+
+=cut
+
+sub get_cache {
+ my $self = shift;
+ return $self->{all_cache} || [];
+}
+
+=head2 set_cache
+
+Sets the contents of the cache for the resultset. Expects an arrayref of objects of the same class as those produced by the resultset.
+
+=cut
+
+sub set_cache {
+ my ( $self, $data ) = @_;
+ $self->throw_exception("set_cache requires an arrayref")
+ if ref $data ne 'ARRAY';
+ my $result_class = $self->result_source->result_class;
+ foreach( @$data ) {
+ $self->throw_exception("cannot cache object of type '$_', expected '$result_class'")
+ if ref $_ ne $result_class;
+ }
+ $self->{all_cache} = $data;
+}
+
+=head2 clear_cache
+
+Clears the cache for the resultset.
+
+=cut
+
+sub clear_cache {
+ my $self = shift;
+ $self->set_cache([]);
+}
+
+=head2 related_resultset
+
+Returns a related resultset for the supplied relationship name.
+
+ $rs = $rs->related_resultset('foo');
+
+=cut
+
+sub related_resultset {
+ my ( $self, $rel, @rest ) = @_;
+ $self->{related_resultsets} ||= {};
+ my $resultsets = $self->{related_resultsets};
+ if( !exists $resultsets->{$rel} ) {
+ #warn "fetching related resultset for rel '$rel'";
+ my $rel_obj = $self->result_source->relationship_info($rel);
+ $self->throw_exception(
+ "search_related: result source '" . $self->result_source->name .
+ "' has no such relationship ${rel}")
+ unless $rel_obj; #die Dumper $self->{attrs};
+ my $rs;
+ if( $self->{attrs}->{cache} ) {
+ $rs = $self->search(undef);
+ }
+ else {
+ $rs = $self->search(undef, { join => $rel });
+ }
+ #use Data::Dumper; die Dumper $rs->{attrs};#$rs = $self->search( undef );
+ #use Data::Dumper; warn Dumper $self->{attrs}, Dumper $rs->{attrs};
+ my $alias = (defined $rs->{attrs}{seen_join}{$rel}
+ && $rs->{attrs}{seen_join}{$rel} > 1
+ ? join('_', $rel, $rs->{attrs}{seen_join}{$rel})
+ : $rel);
+ $resultsets->{$rel} =
+ $self->result_source->schema->resultset($rel_obj->{class}
+ )->search( undef,
+ { %{$rs->{attrs}},
+ alias => $alias,
+ select => undef(),
+ as => undef() }
+ )->search(@rest);
+ }
+ return $resultsets->{$rel};
+}
+
=head2 throw_exception
See Schema's throw_exception
projects / dbsrgits/DBIx-Class.git / blobdiff