# condition resolution may fail if an incomplete master-object prefetch
# is encountered - that is ok during prefetch construction (not yet in_storage)
-
- # if $rel_info->{cond} is a CODE, we might need to join from the
- # current resultsource instead of just querying the target
- # resultsource, in that case, the condition might provide an
- # additional condition in order to avoid an unecessary join if
- # that is at all possible.
- my ($cond, $extended_cond) = try {
+ my ($cond, $is_crosstable) = try {
$source->_resolve_condition( $rel_info->{cond}, $rel, $self, $rel )
}
catch {
$DBIx::Class::ResultSource::UNRESOLVABLE_CONDITION; # RV
};
- if ($cond eq $DBIx::Class::ResultSource::UNRESOLVABLE_CONDITION) {
- my $reverse = $source->reverse_relationship_info($rel);
- foreach my $rev_rel (keys %$reverse) {
- if ($reverse->{$rev_rel}{attrs}{accessor} && $reverse->{$rev_rel}{attrs}{accessor} eq 'multi') {
- $attrs->{related_objects}{$rev_rel} = [ $self ];
- weaken $attrs->{related_object}{$rev_rel}[0];
- } else {
- $attrs->{related_objects}{$rev_rel} = $self;
- weaken $attrs->{related_object}{$rev_rel};
- }
- }
+ # keep in mind that the following if() block is part of a do{} - no return()s!!!
+ if ($is_crosstable) {
+ $self->throw_exception (
+ "A cross-table relationship condition returned for statically declared '$rel'")
+ unless ref $rel_info->{cond} eq 'CODE';
+
+ # A WHOREIFFIC hack to reinvoke the entire condition resolution
+ # with the correct alias. Another way of doing this involves a
+ # lot of state passing around, and the @_ positions are already
+ # mapped out, making this crap a less icky option.
+ #
+ # The point of this exercise is to retain the spirit of the original
+ # $obj->search_related($rel) where the resulting rset will have the
+ # root alias as 'me', instead of $rel (as opposed to invoking
+ # $rs->search_related)
+
+
+ local $source->{_relationships}{me} = $source->{_relationships}{$rel}; # make the fake 'me' rel
+ my $obj_table_alias = lc($source->source_name) . '__row';
+
+ $source->resultset->search(
+ $self->ident_condition($obj_table_alias),
+ { alias => $obj_table_alias },
+ )->search_related('me', $query, $attrs)
}
-
- if (ref $rel_info->{cond} eq 'CODE' && !$extended_cond) {
- # since we don't have the extended condition, we need to step
- # back, get a resultset for the current row and do a
- # search_related there.
-
- my $row_srcname = $source->source_name;
- my $base_rs_class = $source->resultset_class;
- my $base_rs_attr = $source->resultset_attributes;
- my $base_rs = $base_rs_class->new
- ($source,
- {
- %$base_rs_attr,
- alias => $source->storage->relname_to_table_alias(lc($row_srcname).'__row',1)
- });
- my $alias = $base_rs->current_source_alias;
- my %identity = map { ( "${alias}.${_}" => $self->get_column($_) ) } $source->primary_columns;
- my $row_rs = $base_rs->search(\%identity);
- my $related = $row_rs->related_resultset($rel, { %$attrs, alias => 'me' });
- $related->search($query);
-
- } else {
- # when we have the extended condition or we have a simple
- # relationship declaration, it can optimize the JOIN away by
- # simply adding the identity in WHERE.
-
- if (ref $rel_info->{cond} eq 'CODE' && $extended_cond) {
- $cond = $extended_cond;
+ else {
+ # FIXME - this conditional doesn't seem correct - got to figure out
+ # at some point what it does. Also the entire UNRESOLVABLE_CONDITION
+ # business seems shady - we could simply not query *at all*
+ if ($cond eq $DBIx::Class::ResultSource::UNRESOLVABLE_CONDITION) {
+ my $reverse = $source->reverse_relationship_info($rel);
+ foreach my $rev_rel (keys %$reverse) {
+ if ($reverse->{$rev_rel}{attrs}{accessor} && $reverse->{$rev_rel}{attrs}{accessor} eq 'multi') {
+ $attrs->{related_objects}{$rev_rel} = [ $self ];
+ weaken $attrs->{related_object}{$rev_rel}[0];
+ } else {
+ $attrs->{related_objects}{$rev_rel} = $self;
+ weaken $attrs->{related_object}{$rev_rel};
+ }
+ }
}
-
- if (ref $cond eq 'ARRAY') {
+ elsif (ref $cond eq 'ARRAY') {
$cond = [ map {
if (ref $_ eq 'HASH') {
my $hash;
$_;
}
} @$cond ];
- } elsif (ref $cond eq 'HASH') {
- foreach my $key (grep { ! /\./ } keys %$cond) {
+ }
+ elsif (ref $cond eq 'HASH') {
+ foreach my $key (grep { ! /\./ } keys %$cond) {
$cond->{"me.$key"} = delete $cond->{$key};
}
}
$query = ($query ? { '-and' => [ $cond, $query ] } : $cond);
$self->result_source->related_source($rel)->resultset->search(
- $query, $attrs);
+ $query, $attrs
+ );
}
};
}
sub set_from_related {
my ($self, $rel, $f_obj) = @_;
- my $rel_info = $self->relationship_info($rel);
- $self->throw_exception( "No such relationship ${rel}" ) unless $rel_info;
- my $cond = $rel_info->{cond};
- $self->throw_exception(
- "set_from_related can only handle a hash condition; the ".
- "condition for $rel is of type ".
- (ref $cond ? ref $cond : 'plain scalar')
- ) unless ref $cond eq 'HASH';
+
+ my $rel_info = $self->relationship_info($rel)
+ or $self->throw_exception( "No such relationship ${rel}" );
+
if (defined $f_obj) {
my $f_class = $rel_info->{class};
$self->throw_exception( "Object $f_obj isn't a ".$f_class )
unless blessed $f_obj and $f_obj->isa($f_class);
}
- # _resolve_condition might return two hashrefs, specially in the
- # current case, since we know $f_object is an object.
- my ($condref1, $condref2) = $self->result_source->_resolve_condition
+ my ($cond, $crosstable) = $self->result_source->_resolve_condition
($rel_info->{cond}, $f_obj, $rel, $rel);
- # if we get two condrefs, we need to use the second, otherwise we
- # use the first.
- $self->set_columns($condref2 ? $condref2 : $condref1);
+ $self->throw_exception(
+ "Custom relationship '$rel' does not resolve to a join-free condition fragment"
+ ) if $crosstable;
+
+ $self->set_columns($cond);
return 1;
}
projects / dbsrgits/DBIx-Class.git / blobdiff