Need help fixing an error populating a select box in the insert page but works in the editpage

Rails
1

Two Models Country and Bank. The below form is used for insert and edit
page works fine . f.collection_select works fine for edit page but
throws
error for insert page. I think error it is trying to populate the
selected
value in the combo box but country id is not available. Can you help me
fixing the issue? What is prompt used for?

Error

undefined method `map’ for nil:NilClass

Extracted source (around line #23):

20: <%= f.label :country_id %>

21:
22:
23: <%= f.collection_select :country_id, @countries, :id, :name,
:prompt => “Test” %>
24:
25:


26: <%= f.submit %>

class Bank < ActiveRecord::Base
attr_accessible :name,:country_id
belongs_to :country
validates :name, :presence => true

validates_presence_of :country

end

class Country < ActiveRecord::Base
attr_accessible :name
end

Form

<%= form_for(@bank) do |f| %>
<% if @bank.errors.any? %>


<%= pluralize(@bank.errors.count, “error”) %> prohibited this
bank from being saved:

  <ul>
  <% @bank.errors.full_messages.each do |msg| %>
    <li><%= msg %></li>
  <% end %>
  </ul>
</div>

<% end %>

<%= f.label :name %>
<%= f.text_field :name %>
<%= f.label :country_id %>
 <%= f.collection_select :country_id, @countries, :id, :name,

:prompt
=> “Test” %>

<%= f.submit %>
<% end %>
2

On 17 November 2012 17:26, Ruby R. [email protected] wrote:

undefined method `map’ for nil:NilClass

Extracted source (around line #23):

20: <%= f.label :country_id %>

21:
22:
23: <%= f.collection_select :country_id, @countries, :id, :name,
:prompt => “Test” %>

My guess is that @countries is nil (the clue is in the error
message). Are you setting that up in the controller action for
insert?

Colin

3

Yes I am setting it up. i got it to work. :slight_smile: Thanks

4

Thanks I have it working now.