$attrs->{select} = [ map { m/\./ ? $_ : "${alias}.$_" } @cols ];
}
$attrs->{as} ||= [ map { m/^$alias\.(.*)$/ ? $1 : $_ } @{$attrs->{select}} ];
+ if (my $include = delete $attrs->{include_columns}) {
+ push(@{$attrs->{select}}, @$include);
+ push(@{$attrs->{as}}, map { m/([^\.]+)$/; $1; } @$include);
+ }
#use Data::Dumper; warn Dumper(@{$attrs}{qw/select as/});
$attrs->{from} ||= [ { $alias => $source->from } ];
+ $attrs->{seen_join} ||= {};
if (my $join = delete $attrs->{join}) {
foreach my $j (ref $join eq 'ARRAY'
? (@{$join}) : ($join)) {
$seen{$j} = 1;
}
}
- push(@{$attrs->{from}}, $source->resolve_join($join, $attrs->{alias}));
+ push(@{$attrs->{from}}, $source->resolve_join($join, $attrs->{alias}, $attrs->{seen_join}));
}
$attrs->{group_by} ||= $attrs->{select} if delete $attrs->{distinct};
push(@{$attrs->{from}}, $source->resolve_join($p, $attrs->{alias}))
unless $seen{$p};
}
- my @cols = ();
- push @cols, $source->resolve_prefetch($p, $attrs->{alias});
+ my @prefetch = $source->resolve_prefetch($p, $attrs->{alias});
#die Dumper \@cols;
- push(@{$attrs->{select}}, @cols);
- push(@{$attrs->{as}}, @cols);
+ push(@{$attrs->{select}}, map { $_->[0] } @prefetch);
+ push(@{$attrs->{as}}, map { $_->[1] } @prefetch);
}
}
my $query;
if (ref $vals[0] eq 'HASH') {
- $query = $vals[0];
+ $query = { %{$vals[0]} };
} elsif (@cols == @vals) {
$query = {};
@{$query}{@cols} = @vals;
} else {
$query = {@vals};
}
+ foreach (keys %$query) {
+ next if m/\./;
+ $query->{$self->{attrs}{alias}.'.'.$_} = delete $query->{$_};
+ }
#warn Dumper($query);
- return $self->search($query)->next;
+ return $self->search($query,$attrs)->next;
}
=head2 search_related
"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 => $rel,
+ alias => $alias,
select => undef(),
as => undef() }
)->search(@rest);
with to find the number of elements. If passed arguments, does a search
on the resultset and counts the results of that.
+Note: When using C<count> with C<group_by>, L<DBIX::Class> emulates C<GROUP BY>
+using C<COUNT( DISTINCT( columns ) )>. Some databases (notably SQLite) do
+not support C<DISTINCT> with multiple columns. If you are using such a
+database, you should only use columns from the main table in your C<group_by>
+clause.
+
=cut
sub count {
sub delete {
my ($self) = @_;
- $self->result_source->storage->delete($self->result_source->from, $self->{cond});
+ my $del = {};
+ $self->throw_exception("Can't delete on resultset with condition unless hash or array")
+ unless (ref($self->{cond}) eq 'HASH' || ref($self->{cond}) eq 'ARRAY');
+ if (ref $self->{cond} eq 'ARRAY') {
+ $del = [ map { my %hash;
+ foreach my $key (keys %{$_}) {
+ $key =~ /([^\.]+)$/;
+ $hash{$1} = $_->{$key};
+ }; \%hash; } @{$self->{cond}} ];
+ } elsif ((keys %{$self->{cond}})[0] eq '-and') {
+ $del->{-and} = [ map { my %hash;
+ foreach my $key (keys %{$_}) {
+ $key =~ /([^\.]+)$/;
+ $hash{$1} = $_->{$key};
+ }; \%hash; } @{$self->{cond}{-and}} ];
+ } else {
+ foreach my $key (keys %{$self->{cond}}) {
+ $key =~ /([^\.]+)$/;
+ $del->{$1} = $self->{cond}{$key};
+ }
+ }
+ $self->result_source->storage->delete($self->result_source->from, $del);
return 1;
}
C<me.> onto the start of any column without a C<.> in it and sets C<select>
from that, then auto-populates C<as> from C<select> as normal.
+=head2 include_columns (arrayref)
+
+Shortcut to include additional columns in the returned results - for example
+
+ { include_columns => ['foo.name'], join => ['foo'] }
+
+would add a 'name' column to the information passed to object inflation
+
=head2 select (arrayref)
Indicates which columns should be selected from the storage. You can use
}
);
-If you want to fetch columns from related tables as well, see C<prefetch>
+If the same join is supplied twice, it will be aliased to <rel>_2 (and
+similarly for a third time). For e.g.
+
+ my $rs = $schema->resultset('Artist')->search(
+ { 'cds.title' => 'Foo',
+ 'cds_2.title' => 'Bar' },
+ { join => [ qw/cds cds/ ] });
+
+will return a set of all artists that have both a cd with title Foo and a cd
+with title Bar.
+
+If you want to fetch related objects from other tables as well, see C<prefetch>
below.
=head2 prefetch arrayref/hashref
C<cd> or C<artist> relationships, which saves us two SQL statements in this
case.
-Any prefetched relationship will be joined automatically, so there is no need
-for a C<join> attribute in the above search.
+Simple prefetches will be joined automatically, so there is no need
+for a C<join> attribute in the above search. If you're prefetching to
+depth (e.g. { cd => { artist => 'label' } or similar), you'll need to
+specify the join as well.
C<prefetch> can be used with the following relationship types: C<belongs_to>,
-C<has_one>.
+C<has_one> (or if you're using C<add_relationship>, any relationship declared
+with an accessor type of 'single' or 'filter').
=head2 from (arrayref)
=head2 group_by (arrayref)
-A arrayref of columns to group by. Can include columns of joined tables. Note
-note that L</count> doesn't work on grouped resultsets.
+A arrayref of columns to group by. Can include columns of joined tables.
group_by => [qw/ column1 column2 ... /]