[ERROR] wrong number of arguments (given 1, expected 0)

[dcangulo]

I have an issue using this gem.

Steps to reproduce:

1. Terminal: rails new trialapp
2. Terminal: cd trialapp
3. Terminal: rails g model User
4. In db/migrate/xxxxx_create_users.rb add the following:

...
t.string :username
t.string :country_code
...

5. Terminal: rake db:migrate
6. Terminal: rails g controller users
7. In config/routes.rb add the following:

...
resources :users
root 'users#new'
...

8. In Gemfile add the following:

...
gem 'country_select'
...

9. Terminal: bundle install
10. In app/views/users create a new file new.html.erb
11. In app/views/users/new.html.erb add the following:

<%= form_for User.new, url: root_url do |f| %>
  <%= f.country_select :country_code %>
<% end %>

12. Terminal: rails s
13. Open browser and enter localhost:3000 in the address bar.

Expected Output:

A form with a simple select dropdown containing countries.

Actual Output:

ActionView::Template::Error (wrong number of arguments (given 1, expected 0)):
    1: <%= form_for User.new, url: root_url do |f| %>
    2:   <%= f.country_select :country_code %>
    3: <% end %>

Test Environment:

Laptop: MacBook Pro (Retina, 13-inch, Mid 2014)
OS: macOS High Sierra
OS Version: Version 10.13.4 (17E199)
Ruby Version: ruby 2.3.5p376 (2017-09-14 revision 59905) [x86_64-darwin17]
Rails Version: Rails 5.2.1
Browser: Google Chrome
Browser Version: Version 68.0.3440.106 (Official Build) (64-bit)

[jtFrancisco]

I just installed the gem in a new rails 5.2 app, and got the same error.
I asked this as a question on Stackoverflow

[dcangulo]

Okay, I managed to make it work.

In Step 13 it will throw an error stated above.

Solution:

Adding these steps solved the problem in my case.

14. Terminal: bundle update
15. Restart the rails server

Question:

This isn't supposed to be the proper way to handle this right?

[dcangulo]

UPDATE:

It seems like putting gem 'country_select' in the Gemfile and running bundle install will install versioncountry_select (2.5.2).

This version is the version that throws an error stated above.

Then running the Steps 14 and 15 will solve the problem as this updates the gem to version country_select (3.1.1).

Then to solve the problem. We need to explicitly put gem 'country_select', '3.1.1' to let the bundler know that we need the latest version than the old one.

[scudco]

This is definitely strange. I did some searching, and it looks like bundler doesn't guarantee it will grab the latest version of a gem if you leave the version unspecified. That was not my understanding or expectation of how bundler works. I think I'll update the README in the short term.

Thanks for looking into this.