Question

I have a model User which goes like this

class User

  ROLES = {
            "Admin" => 1,
            "Manager" => 2,
            "Officer" => 3
          }

  def admin?
    role == 1
  end

  def manager?
    role == 2
  end

  def officer?
    role == 3
  end

end

where role is a column in users table and I was wondering whether I can use a common method to build the 3 role checking methods from the ROLES hash?

Edit

so this seems to be the answer

class User

  ROLES = {
            "Admin" => 1,
            "Manager" => 2,
            "Officer" => 3
          }

  # methods used to identify whether a user is a specific role
  ROLES.each { |k, v| define_method("#{k.downcase}?") { role == v } }

end

Answer 1

I am not fully sure of your intention, but maybe like this?

class User
  %w[admin manager officer].each_with_index{|m, i| define_method("#{m}?"){role == i+1}}
end

or, using ROLES,

class User
  ROLES.each{|m, i| define_method("#{m.downcase}?"){role == i}}
end