All Rails http verbs are UPPERCASE

Rails supports many http verbs, and in the rails source code they're handily organized by ietf rfc.

    RFC2616 = %w(OPTIONS GET HEAD POST PUT DELETE TRACE CONNECT)
    RFC2518 = %w(PROPFIND PROPPATCH MKCOL COPY MOVE LOCK UNLOCK)
    RFC3253 = %w(VERSION-CONTROL REPORT CHECKOUT CHECKIN UNCHECKOUT MKWORKSPACE UPDATE LABEL MERGE BASELINE-CONTROL MKACTIVITY)
    RFC3648 = %w(ORDERPATCH)
    RFC3744 = %w(ACL)
    RFC5323 = %w(SEARCH)
    RFC4791 = %w(MKCALENDAR)
    RFC5789 = %w(PATCH)

source

Notice though that they're all upper case, so if you try to make an http request with lowercase patch, then you'll get a crazy UnknownHttpMethod error.