Newbie stuck with fields_for and nested attributes in rails - ruby-on-rails

Question

Rails newbie here. I'm stuck on fields_for in Rails, and would be eternally grateful for anyone's help.
In Events#new, why am I getting NoMethodError?
Error message says undefined method `name'
In Events, why am I getting NameError?
Error message says undefined local variable or method 'event'.
I am trying to create and view a form where each event has 2 fields for each friend.
_form.html.erb:
<%= form_for(#event) do |f| %>
<div class="field">
Date: <%= f.text_field :date %></br>
Friends: <%= f.fields_for :friends do |friends_fields| %>
<%= friends_fields.text_field :name %>
<% end %>
<% end %>
index.html.erb:
<tbody>
<% #events.each do |event_form| %>
<tr>
<td><%= event_form.date %></td>
<td><%= event_form.friends.each do |friend| %>
<%= friend.name %>
<% end %>
</td>
<td><%= link_to 'Show', event %></td>
<td><%= link_to 'Edit', edit_event_path(event) %></td>
<td><%= link_to 'Destroy', event, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
event.rb:
class Event < ActiveRecord::Base
has_many :friends
accepts_nested_attributes_for :friends, allow_destroy: true
end
friend.rb:
class Friend < ActiveRecord::Base
belongs_to :event
end
events_controller.rb:
def new
#event = Event.new
2.times { #event.friends.build }
end

Answer 1

Event is not defined because events iterator uses event_form instead of event variable name in each iteration. Try changing to this:
<tbody>
<% #events.each do |event| %>
<tr>
<td><%= event.date %></td>
<td><%= event.friends.each do |friend| %>
<%= friend.name %>
<% end %>
</td>
<td><%= link_to 'Show', event %></td>
<td><%= link_to 'Edit', edit_event_path(event) %></td>
<td><%= link_to 'Destroy', event, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>