use warnings;
use DBIx::Class::ResultSet;
+use Carp::Clan qw/^DBIx::Class/;
-use Carp qw/croak/;
+use Storable;
use base qw/DBIx::Class/;
__PACKAGE__->load_components(qw/AccessorGroup/);
$class = ref $class if ref $class;
my $new = bless({ %{$attrs || {}} }, $class);
$new->{resultset_class} ||= 'DBIx::Class::ResultSet';
- $new->{_ordered_columns} ||= [];
- $new->{_columns} ||= {};
- $new->{_relationships} ||= {};
+ $new->{_ordered_columns} = [ @{$new->{_ordered_columns}||[]}];
+ $new->{_columns} = { %{$new->{_columns}||{}} };
+ $new->{_relationships} = { %{$new->{_relationships}||{}} };
$new->{name} ||= "!!NAME NOT SET!!";
return $new;
}
sub column_info {
my ($self, $column) = @_;
- croak "No such column $column" unless exists $self->_columns->{$column};
+ $self->throw_exception("No such column $column")
+ unless exists $self->_columns->{$column};
if ( (! $self->_columns->{$column}->{data_type})
&& $self->schema && $self->storage() ){
my $info;
=cut
sub columns {
- croak "columns() is a read-only accessor, did you mean add_columns()?" if (@_ > 1);
- return @{shift->{_ordered_columns}||[]};
+ my $self=shift;
+ $self->throw_exception("columns() is a read-only accessor, did you mean add_columns()?") if (@_ > 1);
+ return @{$self->{_ordered_columns}||[]};
}
=head2 set_primary_key(@cols)
my ($self, @cols) = @_;
# check if primary key columns are valid columns
for (@cols) {
- $self->throw("No such column $_ on table ".$self->name)
+ $self->throw_exception("No such column $_ on table ".$self->name)
unless $self->has_column($_);
}
$self->_primaries(\@cols);
my ($self, $name, $cols) = @_;
for (@$cols) {
- $self->throw("No such column $_ on table ".$self->name)
+ $self->throw_exception("No such column $_ on table ".$self->name)
unless $self->has_column($_);
}
An arrayref containing a list of accessors in the foreign class to proxy in
the main class. If, for example, you do the following:
- __PACKAGE__->might_have(bar => 'Bar', undef, { proxy => qw[/ margle /] });
+ __PACKAGE__->might_have(bar => 'Bar', undef, { proxy => [ qw/margle/ ] });
Then, assuming Bar has an accessor named margle, you can do:
sub add_relationship {
my ($self, $rel, $f_source_name, $cond, $attrs) = @_;
- croak "Can't create relationship without join condition" unless $cond;
+ $self->throw_exception("Can't create relationship without join condition") unless $cond;
$attrs ||= {};
my %rels = %{ $self->_relationships };
if ($@) { # If the resolve failed, back out and re-throw the error
delete $rels{$rel}; #
$self->_relationships(\%rels);
- croak "Error creating relationship $rel: $@";
+ $self->throw_exception("Error creating relationship $rel: $@");
}
1;
}
$self->related_source($_)->resolve_join($join->{$_}, $_) }
keys %$join;
} elsif (ref $join) {
- croak ("No idea how to resolve join reftype ".ref $join);
+ $self->throw_exception("No idea how to resolve join reftype ".ref $join);
} else {
my $rel_info = $self->relationship_info($join);
- croak("No such relationship ${join}") unless $rel_info;
+ $self->throw_exception("No such relationship ${join}") unless $rel_info;
my $type = $rel_info->{attrs}{join_type} || '';
return [ { $join => $self->related_source($join)->from,
-join_type => $type },
my %ret;
while (my ($k, $v) = each %{$cond}) {
# XXX should probably check these are valid columns
- $k =~ s/^foreign\.// || croak "Invalid rel cond key ${k}";
- $v =~ s/^self\.// || croak "Invalid rel cond val ${v}";
+ $k =~ s/^foreign\.// || $self->throw_exception("Invalid rel cond key ${k}");
+ $v =~ s/^self\.// || $self->throw_exception("Invalid rel cond val ${v}");
if (ref $for) { # Object
#warn "$self $k $for $v";
$ret{$k} = $for->get_column($v);
}
}
+=head2 resolve_prefetch (hashref/arrayref/scalar)
+
+Accepts one or more relationships for the current source and returns an
+array of column names for each of those relationships. Column names are
+prefixed relative to the current source, in accordance with where they appear
+in the supplied relationships. Examples:
+
+ my $source = $schema->$resultset('Tag')->source;
+ @columns = $source->resolve_prefetch( { cd => 'artist' } );
+
+ # @columns =
+ #(
+ # 'cd.cdid',
+ # 'cd.artist',
+ # 'cd.title',
+ # 'cd.year',
+ # 'cd.artist.artistid',
+ # 'cd.artist.name'
+ #)
+
+ @columns = $source->resolve_prefetch( qw[/ cd /] );
+
+ # @columns =
+ #(
+ # 'cd.cdid',
+ # 'cd.artist',
+ # 'cd.title',
+ # 'cd.year'
+ #)
+
+ $source = $schema->resultset('CD')->source;
+ @columns = $source->resolve_prefetch( qw[/ artist producer /] );
+
+ # @columns =
+ #(
+ # 'artist.artistid',
+ # 'artist.name',
+ # 'producer.producerid',
+ # 'producer.name'
+ #)
+
+=cut
+
+sub resolve_prefetch {
+ my( $self, $pre, $alias ) = @_;
+ use Data::Dumper;
+ #$alias ||= $self->name;
+ #warn $alias, Dumper $pre;
+ if( ref $pre eq 'ARRAY' ) {
+ return map { $self->resolve_prefetch( $_, $alias ) } @$pre;
+ }
+ elsif( ref $pre eq 'HASH' ) {
+ my @ret =
+ map {
+ $self->resolve_prefetch($_, $alias),
+ $self->related_source($_)->resolve_prefetch( $pre->{$_}, $_ )
+ }
+ keys %$pre;
+ #die Dumper \@ret;
+ return @ret;
+ }
+ elsif( ref $pre ) {
+ $self->throw_exception( "don't know how to resolve prefetch reftype " . ref $pre);
+ }
+ else {
+ my $rel_info = $self->relationship_info( $pre );
+ $self->throw_exception( $self->name . " has no such relationship '$pre'" ) unless $rel_info;
+ my $prefix = $alias && $alias ne 'me' ? "$alias.$pre" : $pre;
+ my @ret = map { "$prefix.$_" } $self->related_source($pre)->columns;
+ #warn $alias, Dumper (\@ret);
+ return @ret;
+ }
+}
=head2 related_source($relname)
sub related_source {
my ($self, $rel) = @_;
if( !$self->has_relationship( $rel ) ) {
- croak "No such relationship '$rel'";
+ $self->throw_exception("No such relationship '$rel'");
}
return $self->schema->source($self->relationship_info($rel)->{source});
}
1;
+=head2 throw_exception
+
+See schema's throw_exception
+
+=cut
+
+sub throw_exception {
+ my $self = shift;
+ if (defined $self->schema) {
+ $self->schema->throw_exception(@_);
+ } else {
+ croak(@_);
+ }
+}
+
+
=head1 AUTHORS
Matt S. Trout <mst@shadowcatsystems.co.uk>