Normally the table for abstract class won't be existed, so we should not trying to call `#column_names` on it.

Previously the runtime was reset implicitly when #cleanup_view_runtime was called at the end of most requests. However, this doesn't happen when the request redirects, or send_file is called.  Consequently, the ActiveRecord runtime recorded in the logs included the time taken for both the current request and the previous redirect.  Explicitly resetting at the start of each request ensures that this can't happen, no matter what occurs previously.

Get around weird missing constant error caused by AS instead of simply raising NameError, closes #477.

Fix previous commit by allowing a proc to be given as response_body. This is deprecated and is going to be removed in future releases.

`lookup_context#formats=` being too restrictive, "Accept: text/javascript, */*"
resulted in [:js, "*/*"] formats instead of [:js, :html].
Signed-off-by: NJosé Valim <jose.valim@gmail.com>

requested by josevalim.

raise an error if the old router draw method is used, along with a message advising them to either upgrade their routes or add rails_legacy_mapper to their Gemfile

I have to keep in mind that 1.8.7 does *not* preserve the hash order.

Guys, let's move to use 1.9.2 in production!

This will allow us to do a rootless JSON/XML request to server.