sub ut_foreign_key {
my( $self, $field, $table, $foreign ) = @_;
- return '' if $no_check_foreign;
+ return $self->ut_number($field) if $no_check_foreign;
qsearchs($table, { $foreign => $self->getfield($field) })
or return "Can't find ". $self->table. ".$field ". $self->getfield($field).
" in $table.$foreign";
$self->scalar_sql($sql, @_);
}
+=item row_exists [ WHERE [, PLACEHOLDER ...] ]
+
+Convenience method for the common case of "SELECT 1 FROM table ... LIMIT 1"
+with optional (but almost always needed) WHERE.
+
+=cut
+
+sub row_exists {
+ my($self, $where) = (shift, shift);
+ my $table = $self->table or die 'row_exists called on object of class '.ref($self);
+ my $sql = "SELECT 1 FROM $table";
+ $sql .= " WHERE $where" if $where;
+ $sql .= " LIMIT 1";
+ $self->scalar_sql($sql, @_);
+}
+
=back
=head1 SUBROUTINES