Question

I’m using the following view code in my Ruby (1.9.3) on Rails (3.1) application to edit who a task is owned by.

=simple_form_for task do |f|
  =f.input :owner, collection: task.list.collaborators

Which produces the following selection dropdown.

How do I tell it to display the first_name and last_name of the user?

Note:

Tasks belong to lists which belong to collaborations.

Answer 1

Apparently, task.list.collaborators needs to be in nested array form as [[key, value], [key, value]]. A simple way to do that:

task.list.collaborators.map{|user| [user.id, "#{user.first_name} #{user.last_name}"]}

Alternatively, you can do the following. Add a method to User as you would want it displayed:

class User
  def select_label
    "#{user.first_name} #{user.last_name}"
  end
end

Then use the :label_method and :value_method parameters:

f.input :owner, 
  collection: task.list.collaborators, 
  label_method: :select_label, 
  value_method: :id