# Rails4 log prefix
LOGLEVELSINGLE %{WORD}
PROCESSNUM %{NUMBER}
RAILS4PREFIX %{LOGLEVELSINGLE}, \[%{TIMESTAMP_ISO8601} #%{PROCESSNUM}]  %{LOGLEVEL} -- : 

# This will often be the only line:
URIPATHPARAM2 %{URIPATH:uripath}(?:%{URIPARAM})?
RAILS4HEAD (?m)%{RAILS4PREFIX}Started %{WORD:verb} "%{URIPATHPARAM2:request}" for %{IPORHOST:clientip} at (?<timestamp>%{YEAR}-%{MONTHNUM}-%{MONTHDAY} %{HOUR}:%{MINUTE}:%{SECOND} %{ISO8601_TIMEZONE})

# Output schema migration info right after started
RAILS4SCHEMAMIGRATION \W*%{RAILS4PREFIX}ActiveRecord::SchemaMigration Load \(%{NUMBER:schemams}ms\)  SELECT "schema_migrations".* FROM "schema_migrations"
# For some strange reason, params are stripped of {} - not sure that's a good idea.
RAILS4PARAMETERS \W*%{RAILS4PREFIX}  Parameters: {%{DATA:params}}
RAILS4RPROCESSING (?:%{RAILS4SCHEMAMIGRATION})?\W*%{RAILS4PREFIX}Processing by %{RCONTROLLER} as (?<format>\S+)(?:%{RAILS4PARAMETERS})?

RAILS4PROFILE (?:\(Views: %{NUMBER:viewms:float}ms \| ActiveRecord: %{NUMBER:activerecordms:float}ms|\(ActiveRecord: %{NUMBER:activerecordms:float}ms)?
RAILS4FOOT %{RAILS4PREFIX}Completed %{NUMBER:response} %{DATA} in %{NUMBER:totalms:int}ms %{RAILS4PROFILE}%{GREEDYDATA}

# Put it all together
RAILS4 %{RAILS4HEAD}(?:%{RAILS4RPROCESSING})?(?<context>(?:%{DATA}\n)*)(?:%{RAILS4FOOT})?