trying to type too long subtitle gives assert #829
Description
trying to type too long subtitle (in cfp edit page) gives the following assertion
An ActiveRecord::ValueTooLong occurred in events#update:
PG::StringDataRightTruncation: ERROR: value too long for type character varying(255)
: UPDATE "events" SET "title" = $1, "subtitle" = $2, "abstract" = $3, "updated_at" = $4 WHERE "events"."id" = $5
app/controllers/cfp/events_controller.rb:61:in `block in update'
The user only sees "something went wrong."