cleanups

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / Storage / DBI / NoBindVars.pm

diff --git a/lib/DBIx/Class/Storage/DBI/NoBindVars.pm b/lib/DBIx/Class/Storage/DBI/NoBindVars.pm
index 2ab0799..637e411 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/NoBindVars.pm
+++ b/lib/DBIx/Class/Storage/DBI/NoBindVars.pm
@@ -4,6 +4,8 @@ use strict;
 use warnings;
 
 use base 'DBIx::Class::Storage::DBI';
+use Scalar::Util ();
+use Carp::Clan qw/^DBIx::Class/;
 
 =head1 NAME 
 
@@ -17,15 +19,17 @@ well, as is the case with L<DBD::Sybase>
 
 =head1 METHODS
 
-=head2 sth
+=head2 connect_info
 
-Uses C<prepare> instead of the usual C<prepare_cached>, seeing as we can't cache very effectively without bind variables.
+We can't cache very effectively without bind variables, so force the C<disable_sth_caching> setting to be turned on when the connect info is set.
 
 =cut
 
-sub _dbh_sth {
-  my ($self, $dbh, $sql) = @_;
-  $dbh->prepare($sql);
+sub connect_info {
+    my $self = shift;
+    my $retval = $self->next::method(@_);
+    $self->disable_sth_caching(1);
+    $retval;
 }
 
 =head2 _prep_for_execute
@@ -36,13 +40,65 @@ Manually subs in the values for the usual C<?> placeholders.
 
 sub _prep_for_execute {
   my $self = shift;
-  my ($sql, @bind) = $self->next::method(@_);
 
-  $sql =~ s/\?/$self->_dbh->quote($_)/e for (@bind);
+  my ($op, $extra_bind, $ident, $args) = @_;
 
-  return ($sql);
+  my ($sql, $bind) = $self->next::method(@_);
+
+  # stringify args, quote via $dbh, and manually insert
+
+  my @sql_part = split /\?/, $sql;
+  my $new_sql;
+
+  my $alias2src = $self->_resolve_ident_sources($ident);
+
+  foreach my $bound (@$bind) {
+    my $col = shift @$bound;
+
+    my $name_sep   = $self->_sql_maker_opts->{name_sep} || '.';
+    my $quote_char = $self->_sql_maker_opts->{quote_char} || '';
+    $quote_char    = join '', @$quote_char if ref $quote_char eq 'ARRAY';
+
+    $col =~ s/[\Q${quote_char}\E]//g if $quote_char;
+    $col =~ s/^([^\Q${name_sep}\E]*)\Q${name_sep}\E//;
+    my $alias = $1 || 'me';
+
+    my $rsrc = $alias2src->{$alias};
+
+    my $datatype = $rsrc && $rsrc->column_info($col)->{data_type};
+
+    foreach my $data (@$bound) {
+        $data = ''.$data if ref $data;
+
+        $data = $self->_dbh->quote($data) if $self->should_quote($datatype, $data);
+
+        $new_sql .= shift(@sql_part) . $data;
+    }
+  }
+  $new_sql .= join '', @sql_part;
+
+  return ($new_sql, []);
 }
 
+=head2 should_quote
+                                
+This method is called by L</_prep_for_execute> for every column in
+order to determine if its value should be quoted or not. The arguments
+are the current column data type and the actual bind value. The return
+value is interpreted as: true - do quote, false - do not quote. You should
+override this in you Storage::DBI::<database> subclass, if your RDBMS
+does not like quotes around certain datatypes (e.g. Sybase and integer
+columns). The default method always returns true (do quote).
+                                
+ WARNING!!!                     
+                                
+ Always validate that the bind-value is valid for the current datatype.
+ Otherwise you may very well open the door to SQL injection attacks.
+                                
+=cut                            
+                                
+sub should_quote { 1 }
+
 =head1 AUTHORS
 
 Brandon Black <blblack@gmail.com>