X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FRelationship%2FBase.pm;h=8925121e32de6398c21a2e2b40e8200b0e2c0a5b;hb=64acc2bc801dcc1c982b16fe45434e9b82edcef6;hp=35f906725662ccda689d1216847f8d3a5f5505c3;hpb=87772e46b99bc03f36c5a82ec29282a3228c29c7;p=dbsrgits%2FDBIx-Class-Historic.git

diff --git a/lib/DBIx/Class/Relationship/Base.pm b/lib/DBIx/Class/Relationship/Base.pm
index 35f9067..8925121 100644
--- a/lib/DBIx/Class/Relationship/Base.pm
+++ b/lib/DBIx/Class/Relationship/Base.pm
@@ -51,7 +51,7 @@ command immediately before C<JOIN>.
 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:
 
@@ -69,94 +69,13 @@ created, which calls C<create_related> for the relationship.
 
 =back
 
-=cut
-
-sub add_relationship {
-  shift->result_source->add_relationship(@_);
-}
+=head2 register_relationship($relname, $rel_info)
 
-sub relationships {
-  shift->result_source->relationships(@_);
-}
-
-sub relationship_info {
-  shift->result_source->relationship_info(@_);
-}
+Registers a relationship on the class
 
-sub resolve_condition {
-  my ($self, $cond, $attrs) = @_;
-  if (ref $cond eq 'HASH') {
-    my %ret;
-    foreach my $key (keys %$cond) {
-      my $val = $cond->{$key};
-      if (ref $val) {
-        $self->throw("Can't handle this yet :(");
-      } else {
-        $ret{$self->_cond_key($attrs => $key)}
-          = $self->_cond_value($attrs => $key => $val);
-      }
-    }
-    return \%ret;
-  } else {
-   $self->throw("Can't handle this yet :(");
-  }
-}
-
-sub _cond_key {
-  my ($self, $attrs, $key, $alias) = @_;
-  my $action = $attrs->{_action} || '';
-  if ($action eq 'convert') {
-    unless ($key =~ s/^foreign\.//) {
-      $self->throw("Unable to convert relationship to WHERE clause: invalid key ${key}");
-    }
-    if (defined (my $alias = $attrs->{_aliases}{foreign})) {
-      return "${alias}.${key}";
-    } else {
-      return $key;
-    }
-  } elsif ($action eq 'join') {
-    return $key unless $key =~ /\./;
-    my ($type, $field) = split(/\./, $key);
-    if (my $alias = $attrs->{_aliases}{$type}) {
-      my $class = $attrs->{_classes}{$alias};
-      $self->throw("Unknown column $field on $class as $alias")
-        unless $class->has_column($field);
-      return join('.', $alias, $field);
-    } else {
-      $self->throw( "Unable to resolve type ${type}: only have aliases for ".
-            join(', ', keys %{$attrs->{_aliases} || {}}) );
-    }
-  }
-  return $self->next::method($attrs, $key);
-}
+=cut
 
-sub _cond_value {
-  my ($self, $attrs, $key, $value) = @_;
-  my $action = $attrs->{_action} || '';
-  if ($action eq 'convert') {
-    unless ($value =~ s/^self\.//) {
-      $self->throw( "Unable to convert relationship to WHERE clause: invalid value ${value}" );
-    }
-    unless ($self->has_column($value)) {
-      $self->throw( "Unable to convert relationship to WHERE clause: no such accessor ${value}" );
-    }
-    return $self->get_column($value);
-  } elsif ($action eq 'join') {
-    return $key unless $key =~ /\./;
-    my ($type, $field) = split(/\./, $value);
-    if (my $alias = $attrs->{_aliases}{$type}) {
-      my $class = $attrs->{_classes}{$alias};
-      $self->throw("Unknown column $field on $class as $alias")
-        unless $class->has_column($field);
-      return join('.', $alias, $field);
-    } else {
-      $self->throw( "Unable to resolve type ${type}: only have aliases for ".
-            join(', ', keys %{$attrs->{_aliases} || {}}) );
-    }
-  }
-      
-  return $self->next::method($attrs, $key, $value)
-}
+sub register_relationship { }
 
 =head2 search_related
 
@@ -167,31 +86,19 @@ sub _cond_value {
 sub search_related {
   my $self = shift;
   my $rel = shift;
-  my $attrs = { };
-  if (@_ > 1 && ref $_[$#_] eq 'HASH') {
-    $attrs = { %{ pop(@_) } };
+  my $rs = $self->related_resultset($rel);
+  if( @_ ) {
+    return $rs->search(@_);
+  }
+  else {
+    # search() returns a new resultset, so related_resultsets would be lost
+    return wantarray ? $rs->all : $rs;
   }
-  my $rel_obj = $self->relationship_info($rel);
-  $self->throw( "No such relationship ${rel}" ) unless $rel_obj;
-  $attrs = { %{$rel_obj->{attrs} || {}}, %{$attrs || {}} };
-
-  $self->throw( "Invalid query: @_" ) if (@_ > 1 && (@_ % 2 == 1));
-  my $query = ((@_ > 1) ? {@_} : shift);
-
-  $attrs->{_action} = 'convert'; # shouldn't we resolve the cond to something
-                                 # to merge into the AST really?
-  my ($cond) = $self->resolve_condition($rel_obj->{cond}, $attrs);
-  $query = ($query ? { '-and' => [ $cond, $query ] } : $cond);
-  #use Data::Dumper; warn Dumper($query);
-  #warn $rel_obj->{class}." $meth $cond ".join(', ', @{$attrs->{bind}||[]});
-  delete $attrs->{_action};
-  return $self->result_source->schema->resultset($rel_obj->{class}
-           )->search($query, $attrs);
 }
 
 =head2 count_related
 
-  My::Table->count_related('relname', $cond, $attrs);
+  $obj->count_related('relname', $cond, $attrs);
 
 =cut
 
@@ -207,9 +114,11 @@ sub count_related {
 =cut
 
 sub create_related {
-  my $class = shift;
+  my $self = shift;
   my $rel = shift;
-  return $class->search_related($rel)->create(@_);
+  my $obj = $self->search_related($rel)->create(@_);
+  delete $self->{related_resultsets}->{$rel};
+  return $obj;
 }
 
 =head2 new_related
@@ -255,23 +164,17 @@ sub find_or_create_related {
 sub set_from_related {
   my ($self, $rel, $f_obj) = @_;
   my $rel_obj = $self->relationship_info($rel);
-  $self->throw( "No such relationship ${rel}" ) unless $rel_obj;
+  $self->throw_exception( "No such relationship ${rel}" ) unless $rel_obj;
   my $cond = $rel_obj->{cond};
-  $self->throw( "set_from_related can only handle a hash condition; the "
+  $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 $f_class = $self->result_source->schema->class($rel_obj->{class});
-  $self->throw( "Object $f_obj isn't a ".$f_class )
+  $self->throw_exception( "Object $f_obj isn't a ".$f_class )
     unless $f_obj->isa($f_class);
-  foreach my $key (keys %$cond) {
-    next if ref $cond->{$key}; # Skip literals and complex conditions
-    $self->throw("set_from_related can't handle $key as key")
-      unless $key =~ m/^foreign\.([^\.]+)$/;
-    my $val = $f_obj->get_column($1);
-    $self->throw("set_from_related can't handle ".$cond->{$key}." as value")
-      unless $cond->{$key} =~ m/^self\.([^\.]+)$/;
-    $self->set_column($1 => $val);
-  }
+  $self->set_columns(
+    $self->result_source->resolve_condition(
+       $rel_obj->{cond}, $f_obj, $rel));
   return 1;
 }
 
@@ -295,11 +198,72 @@ sub update_from_related {
 
 sub delete_related {
   my $self = shift;
-  return $self->search_related(@_)->delete;
+  my $obj = $self->search_related(@_)->delete;
+  delete $self->{related_resultsets}->{$_[0]};
+  return $obj;
 }
 
 1;
 
+=head2 related_resultset($name)
+
+Returns a L<DBIx::Class::ResultSet> for the relationship named $name.
+
+  $rs = My::Table->related_resultset('related_table');
+
+=cut
+
+sub related_resultset {
+  my $self = shift;
+  $self->throw_exception("Can't call *_related as class methods") unless ref $self;
+  my $rel = shift;
+  $self->{related_resultsets} ||= {};
+  #use Data::Dumper; warn "related_resultsets: ", Dumper $self->{related_resultsets};
+  my $resultsets = $self->{related_resultsets};
+  if( !exists $resultsets->{$rel} ) {
+
+    #warn "creating related resultset for relation '$rel'", \$self;
+    my $source = $self->result_source;
+    # if relation exists but resultset doesn't, create the resultset
+
+    my $attrs = { };
+    if (@_ > 1 && ref $_[$#_] eq 'HASH') {
+      $attrs = { %{ pop(@_) } };
+    }
+  
+    my $rel_obj = $self->relationship_info($rel);
+    $self->throw_exception( "No such relationship ${rel}" ) unless $rel_obj;
+    $attrs = { %{$rel_obj->{attrs} || {}}, %{$attrs || {}} };
+
+    $self->throw_exception( "Invalid query: @_" ) if (@_ > 1 && (@_ % 2 == 1));
+    my $query = ((@_ > 1) ? {@_} : shift);
+
+    my ($cond) = $self->result_source->resolve_condition($rel_obj->{cond}, $rel, $self);
+    if (ref $cond eq 'ARRAY') {
+      $cond = [ map { my %hash;
+        foreach my $key (keys %{$_}) {
+          unless ($key =~ m/\./) {
+            $hash{"me.$key"} = $_->{$key};
+          } else {
+           $hash{$key} = $_->{$key};
+          }
+        }; \%hash; } @$cond ];
+      } else {
+      foreach my $key (keys %$cond) {
+        unless ($key =~ m/\./) {
+          $cond->{"me.$key"} = delete $cond->{$key};
+        }
+      }
+    }
+    $query = ($query ? { '-and' => [ $cond, $query ] } : $cond);
+    #use Data::Dumper; warn Dumper($cond);
+    #warn $rel_obj->{class}." $meth $cond ".join(', ', @{$attrs->{bind}||[]});
+    $resultsets->{$rel} = 
+      $self->result_source->related_source($rel)->resultset->search($query, $attrs);
+  }
+  return $resultsets->{$rel};
+}
+
 =head1 AUTHORS
 
 Matt S. Trout <mst@shadowcatsystems.co.uk>