Wrong number of arguments?

Question

I\'m following Michael Hartl\'s tutorial here and am trying to create an index of users.

My code:

  class UsersController < ApplicationController         


        

Answer 1

According to the tutorial, the gravatar_for method is defined as

def gravatar_for(user)
  gravatar_id = Digest::MD5::hexdigest(user.email.downcase)
  gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}"
  image_tag(gravatar_url, alt: user.name, class: "gravatar")
end

Notice that it only accepts one parameter: the user. Later in chapter 7, after the exercises, the tutorial describes how to add a size parameter:

# Returns the Gravatar (http://gravatar.com/) for the given user.
def gravatar_for(user, options = { size: 50 })
  gravatar_id = Digest::MD5::hexdigest(user.email.downcase)
  size = options[:size]
  gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}?s=#{size}"
  image_tag(gravatar_url, alt: user.name, class: "gravatar")
end

Judging by your error message, you haven't updated the method to use the optional size parameter.