CODEWITHSUNDEEP
ruby-on-rails
Eva
Eva

Reputation: 11

Ruby on rails errors undefined method `map' for nil:NilClass

Below is code extract from my file /home/divya/climb/project1/app/views/cities/new.html.erb where line #5 raised this error:

undefined method `map' for nil:NilClass

Extracted source (around line #5):

2: <%= form_for(@city) do |f| %>
3: <%= f.label :country_id %><br />
4: 
5: <%= collection_select(:city, :country_id, @countries, :id, :country_name, {:prompt => false}) %>
6: <%= render 'form' %>
7: 
8: <%= link_to 'Back', cities_path %>

Rails.root: /home/divya/climb/project

Upvotes: 1

Views: 4812

Answers (3)

user6158560
user6158560

Reputation: 1

only change this variable in your controller use a global variable $countries=Country.all and your view use this variable.

Upvotes: 0

Marek Lipka
Marek Lipka

Reputation: 51151

Apparently you didn't set your @countries instance variable in controller, so it is nil. map method is called on @countries internally by ActionView (to be strict, by options_from_collection_for_select method).

You should set @countries in controller, with:

@countries = Country.all

or call it directly in view:

<%= collection_select(:city, :country_id, Country.all, :id, :country_name, { :prompt => false }) %>

Upvotes: 7

Salil
Salil

Reputation: 47482

Change 

<%= collection_select(:city, :country_id, @countries, :id, :country_name, {:prompt => false}) %>

To

<%= collection_select(:city, :country_id, Country.all, :id, :country_name, {:prompt => false}) %>

Upvotes: 2

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