X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FRow.pm;h=f59532a3f24113a6ccf99ae6a8290cf8afa58edf;hb=fc27a8673e1a18b155da3619c93e992bf9ec676f;hp=3d79dcaf5ddd4ff77863ac965dd93828d306e1c8;hpb=0dc792491a0296584ea02abe0071ab7bd7d4618a;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Row.pm b/lib/DBIx/Class/Row.pm
index 3d79dca..f59532a 100644
--- a/lib/DBIx/Class/Row.pm
+++ b/lib/DBIx/Class/Row.pm
@@ -4,6 +4,7 @@ use strict;
 use warnings;
 
 use base qw/DBIx::Class/;
+use Carp::Clan qw/^DBIx::Class/;
 
 __PACKAGE__->load_components(qw/AccessorGroup/);
 
@@ -18,7 +19,7 @@ DBIx::Class::Row - Basic row methods
 =head1 DESCRIPTION
 
 This class is responsible for defining and doing basic operations on rows
-derived from L<DBIx::Class::Table> objects.
+derived from L<DBIx::Class::ResultSource> objects.
 
 =head1 METHODS
 
@@ -35,9 +36,9 @@ sub new {
   $class = ref $class if ref $class;
   my $new = bless({ _column_data => { } }, $class);
   if ($attrs) {
-    $new->throw("attrs must be a hashref" ) unless ref($attrs) eq 'HASH';
+    $new->throw_exception("attrs must be a hashref" ) unless ref($attrs) eq 'HASH';
     while (my ($k, $v) = each %{$attrs}) {
-      die "No such column $k on $class" unless $class->has_column($k);
+      $new->throw_exception("No such column $k on $class") unless $class->has_column($k);
       $new->store_column($k => $v);
     }
   }
@@ -60,7 +61,7 @@ sub insert {
   $self->{result_source} ||= $self->result_source_instance
     if $self->can('result_source_instance');
   my $source = $self->{result_source};
-  die "No result_source set on this object; can't insert" unless $source;
+  $self->throw_exception("No result_source set on this object; can't insert") unless $source;
   #use Data::Dumper; warn Dumper($self);
   $source->storage->insert($source->from, { $self->get_columns });
   $self->in_storage(1);
@@ -94,15 +95,19 @@ UPDATE query to commit any changes to the object to the db if required.
 
 sub update {
   my ($self, $upd) = @_;
-  $self->throw( "Not in database" ) unless $self->in_storage;
+  $self->throw_exception( "Not in database" ) unless $self->in_storage;
+  $self->set_columns($upd) if $upd;
   my %to_update = $self->get_dirty_columns;
   return $self unless keys %to_update;
+  my $ident_cond = $self->ident_condition;
+  $self->throw_exception("Cannot safely update a row in a PK-less table")
+    if ! keys %$ident_cond;
   my $rows = $self->result_source->storage->update(
-               $self->result_source->from, \%to_update, $self->ident_condition);
+               $self->result_source->from, \%to_update, $ident_cond);
   if ($rows == 0) {
-    $self->throw( "Can't update ${self}: row not found" );
+    $self->throw_exception( "Can't update ${self}: row not found" );
   } elsif ($rows > 1) {
-    $self->throw("Can't update ${self}: updated more than one row");
+    $self->throw_exception("Can't update ${self}: updated more than one row");
   }
   $self->{_dirty_columns} = {};
   return $self;
@@ -121,12 +126,15 @@ be re ->insert'ed before it can be ->update'ed
 sub delete {
   my $self = shift;
   if (ref $self) {
-    $self->throw( "Not in database" ) unless $self->in_storage;
+    $self->throw_exception( "Not in database" ) unless $self->in_storage;
+    my $ident_cond = $self->ident_condition;
+    $self->throw_exception("Cannot safely delete a row in a PK-less table")
+      if ! keys %$ident_cond;
     $self->result_source->storage->delete(
-      $self->result_source->from, $self->ident_condition);
+      $self->result_source->from, $ident_cond);
     $self->in_storage(undef);
   } else {
-    die "Can't do class delete without a ResultSource instance"
+    $self->throw_exception("Can't do class delete without a ResultSource instance")
       unless $self->can('result_source_instance');
     my $attrs = { };
     if (@_ > 1 && ref $_[$#_] eq 'HASH') {
@@ -150,10 +158,10 @@ the database and stored in the object.
 
 sub get_column {
   my ($self, $column) = @_;
-  $self->throw( "Can't fetch data as class method" ) unless ref $self;
+  $self->throw_exception( "Can't fetch data as class method" ) unless ref $self;
   return $self->{_column_data}{$column}
     if exists $self->{_column_data}{$column};
-  $self->throw( "No such column '${column}'" ) unless $self->has_column($column);
+  $self->throw_exception( "No such column '${column}'" ) unless $self->has_column($column);
   return undef;
 }
 
@@ -167,7 +175,7 @@ Does C<get_column>, for all column values at once.
 
 sub get_columns {
   my $self = shift;
-  return return %{$self->{_column_data}};
+  return %{$self->{_column_data}};
 }
 
 =head2 get_dirty_columns
@@ -244,9 +252,9 @@ Sets a column value without marking it as dirty.
 
 sub store_column {
   my ($self, $column, $value) = @_;
-  $self->throw( "No such column '${column}'" ) 
+  $self->throw_exception( "No such column '${column}'" ) 
     unless exists $self->{_column_data}{$column} || $self->has_column($column);
-  $self->throw( "set_column called for ${column} without value" ) 
+  $self->throw_exception( "set_column called for ${column} without value" ) 
     if @_ < 3;
   return $self->{_column_data}{$column} = $value;
 }
@@ -270,24 +278,23 @@ sub inflate_result {
   my $schema;
   PRE: foreach my $pre (keys %{$prefetch||{}}) {
     my $pre_source = $source->related_source($pre);
-    die "Can't prefetch non-existant relationship ${pre}" unless $pre_source;
-    my $fetched = $pre_source->result_class->inflate_result(
-                    $pre_source, @{$prefetch->{$pre}});
+    $class->throw_exception("Can't prefetch non-existant relationship ${pre}") unless $pre_source;
+    my $fetched;
+    unless ($pre_source->primary_columns == grep { exists $prefetch->{$pre}[0]{$_} 
+       and !defined $prefetch->{$pre}[0]{$_} } $pre_source->primary_columns)
+    {
+      $fetched = $pre_source->result_class->inflate_result(
+                      $pre_source, @{$prefetch->{$pre}});      
+    }
     my $accessor = $source->relationship_info($pre)->{attrs}{accessor};
-    $class->throw("No accessor for prefetched $pre")
+    $class->throw_exception("No accessor for prefetched $pre")
       unless defined $accessor;
-    PRIMARY: foreach my $pri ($pre_source->primary_columns) {
-      unless (defined $fetched->get_column($pri)) {
-        undef $fetched;
-        last PRIMARY;
-      }
-    }
     if ($accessor eq 'single') {
       $new->{_relationship_data}{$pre} = $fetched;
     } elsif ($accessor eq 'filter') {
       $new->{_inflated_column}{$pre} = $fetched;
     } else {
-      $class->throw("Don't know how to store prefetched $pre");
+      $class->throw_exception("Don't know how to store prefetched $pre");
     }
   }
   return $new;
@@ -320,8 +327,40 @@ sub is_changed {
 
   Accessor to the ResultSource this object was created from
 
+=head2 register_column($column, $column_info)
+
+  Registers a column on the class. If the column_info has an 'accessor' key,
+  creates an accessor named after the value if defined; if there is no such
+  key, creates an accessor with the same name as the column
+
+=cut
+
+sub register_column {
+  my ($class, $col, $info) = @_;
+  my $acc = $col;
+  if (exists $info->{accessor}) {
+    return unless defined $info->{accessor};
+    $acc = [ $info->{accessor}, $col ];
+  }
+  $class->mk_group_accessors('column' => $acc);
+}
+
+
+=head2 throw_exception
+
+See Schema's throw_exception.
+
 =cut
 
+sub throw_exception {
+  my $self=shift;
+  if (ref $self && ref $self->result_source) {
+    $self->result_source->schema->throw_exception(@_);
+  } else {
+    croak(@_);
+  }
+}
+
 1;
 
 =head1 AUTHORS