How about something like this? Don't try to rescue exception, instead avoid
it by checking if valid? before attempting save.
class Song < Sequel::Model
plugin :validation_helpers
def validate
super
validates_presence [:title, :length, :released_on, :lyrics]
end
end
get '/new' do
@song = Song.new
slim :new_song
end
post '/' do
@song = Song.new(params[:song])
if @song.valid?
@song.save
flash[:notice] = "Song successfully added #{@song}"
redirect to("/#{@song}")
else
flash[:notice] = @song.errors.full_messages.join("\n")
redirect to("/new")
end
end
FYI, there's actually a better way than redirecting to "/new", and that is
just rendering out the "new_song" template again if saving fails. That
preserves error messages which you can then output beside each input (if
you wanted to). Likely something to work towards since I believe you're
following a book? and no point in complicating things too much.
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