Ruby on Rails full_messages for specific attribute

Question

In Rails I can do this to get the full error message (includes the name of the attribute)

book.errors.full_messages.each do |err|
  puts err
end

My question is, how can I do the same thing but for a specific attribute?

I can't do this:

book.errors[:title].full_messages

As for now this is what I'm doing

book.errors[:title].each do |err|
  puts " Title #{err}"
end

I'm looking forward if there's a better way

Answer 1

To get the full error message for a specific attribute use full_messages_for:

book.errors.full_messages_for(:title)