diff options
Diffstat (limited to 'guides')
| -rw-r--r-- | guides/source/upgrading_ruby_on_rails.md | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/guides/source/upgrading_ruby_on_rails.md b/guides/source/upgrading_ruby_on_rails.md index 77a09cd5f0..9581cb5c21 100644 --- a/guides/source/upgrading_ruby_on_rails.md +++ b/guides/source/upgrading_ruby_on_rails.md @@ -143,6 +143,8 @@ Also check your environment settings for `config.action_dispatch.best_standards_ * In Rails 4.0, a rescuable exception `ActionController::UnknownFormat` is raised when Rails doesn't know what to do with the request format, rather than responding with a head :not_acceptable (406). +* In Rails 4.0 a generic rescuable exception `ActionDispatch::ParamsParser::ParseError` is raised when `ParamsParser` fails parsing request params. You will want to rescue from this generic exception instead of `MultiJson::DecodeError`, for example. + * In Rails 4.0, `SCRIPT_NAME` is properly handled for mounted apps and engines. One caveat of the fix is that you should *not* set `default_url_options[:script_name]` explicitly if your server already passes correct `SCRIPT_NAME` to rack env. |