Helper primary_columns wrapper to throw if a PK is not defined

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / ResultSource.pm

diff --git a/lib/DBIx/Class/ResultSource.pm b/lib/DBIx/Class/ResultSource.pm
index 4dc8e31..26b01cd 100644 (file)
--- a/lib/DBIx/Class/ResultSource.pm
+++ b/lib/DBIx/Class/ResultSource.pm
@@ -503,6 +503,16 @@ sub primary_columns {
   return @{shift->_primaries||[]};
 }
 
+sub _pri_cols {
+  my $self = shift;
+  my @pcols = $self->primary_columns
+    or $self->throw_exception (sprintf(
+      'Operation requires a primary key to be declared on %s via set_primary_key',
+      ref $self,
+    ));
+  return @pcols;
+}
+
 =head2 add_unique_constraint
 
 =over 4
@@ -1205,7 +1215,7 @@ sub _resolve_join {
   $self->throw_exception ('You must supply a joinpath arrayref as the 4th argument to _resolve_join')
     unless ref $jpath eq 'ARRAY';
 
-  $jpath = [@$jpath];
+  $jpath = [@$jpath]; # copy
 
   if (not defined $join) {
     return ();
@@ -1228,12 +1238,14 @@ sub _resolve_join {
       $force_left ||= lc($rel_info->{attrs}{join_type}||'') eq 'left';
 
       # the actual seen value will be incremented by the recursion
-      my $as = ($seen->{$rel} ? join ('_', $rel, $seen->{$rel} + 1) : $rel);
+      my $as = $self->storage->relname_to_table_alias(
+        $rel, ($seen->{$rel} && $seen->{$rel} + 1)
+      );
 
       push @ret, (
         $self->_resolve_join($rel, $alias, $seen, [@$jpath], $force_left),
         $self->related_source($rel)->_resolve_join(
-          $join->{$rel}, $as, $seen, [@$jpath, $rel], $force_left
+          $join->{$rel}, $as, $seen, [@$jpath, { $rel => $as }], $force_left
         )
       );
     }
@@ -1245,7 +1257,9 @@ sub _resolve_join {
   }
   else {
     my $count = ++$seen->{$join};
-    my $as = ($count > 1 ? "${join}_${count}" : $join);
+    my $as = $self->storage->relname_to_table_alias(
+      $join, ($count > 1 && $count)
+    );
 
     my $rel_info = $self->relationship_info($join)
       or $self->throw_exception("No such relationship ${join}");
@@ -1257,7 +1271,8 @@ sub _resolve_join {
                   ? 'left'
                   : $rel_info->{attrs}{join_type}
                 ,
-               -join_path => [@$jpath, $join],
+               -join_path => [@$jpath, { $join => $as } ],
+               -is_single => (List::Util::first { $rel_info->{attrs}{accessor} eq $_ } (qw/single filter/) ),
                -alias => $as,
                -relation_chain_depth => $seen->{-relation_chain_depth} || 0,
              },
@@ -1334,13 +1349,13 @@ sub _resolve_condition {
         unless ($for->has_column_loaded($v)) {
           if ($for->in_storage) {
             $self->throw_exception(sprintf
-              "Unable to resolve relationship '%s' from '%s': column '%s' of object %s "
-            . 'not loaded from storage (or not passed to new() prior to insert()). '
-            . 'Maybe you forgot to call ->discard_changes to get defaults from the db.',
+              "Unable to resolve relationship '%s' from object %s: column '%s' not "
+            . 'loaded from storage (or not passed to new() prior to insert()). You '
+            . 'probably need to call ->discard_changes to get the server-side defaults '
+            . 'from the database.',
               $as,
-              $for->result_source->source_name,
-              $v,
               $for,
+              $v,
             );
           }
           return $UNRESOLVABLE_CONDITION;
@@ -1443,8 +1458,7 @@ sub resolve_prefetch {
 # 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. Needs an alias_map generated by
-# $rs->_joinpath_aliases
+# in the supplied relationships.
 
 sub _resolve_prefetch {
   my ($self, $pre, $alias, $alias_map, $order, $collapse, $pref_path) = @_;
@@ -1579,7 +1593,7 @@ L<DBIx::Class::ResultSourceHandle>.
 =cut
 
 sub handle {
-    return new DBIx::Class::ResultSourceHandle({
+    return DBIx::Class::ResultSourceHandle->new({
         schema         => $_[0]->schema,
         source_moniker => $_[0]->source_name
     });