* CMTD::Helpers->captcha_by_id

lib/CMTD/Helpers.pm

@@ -82,7 +82,7 @@ sub register {
   });
   $app->helper(captcha_by_id => sub {
     my ($c, $cid) = @_;
-    return $c->app->db->select('captcha', '*', {cid => $cid})->hash;
+    return $c->app->db->select('captcha', '*', {id => $cid})->hash;
   });
   $app->helper(captcha_solve => sub {
     my ($c, $id, $input) = @_;