Activeadmin: Ruby 3.0.0 issue with formtastic, Actionview::Template::Error(Wrong number of arguments(given 2, expected 0..1))

Created on 6 Jan 2021 · 3Comments · Source: activeadmin/activeadmin

Running active admin 2.9.0, Rails 6.1 and ruby 3.0.0.
For the following code for active admin

ActiveAdmin.register User do
end

on loading the http://localhost:3000/admin/users page got the following error

ActionView::Template::Error (wrong number of arguments (given 2, expected 0..1)):
    1: insert_tag renderer_for(:index)

i18n (1.8.7) lib/i18n.rb:195:in `translate'
formtastic (3.1.5) lib/formtastic/i18n.rb:26:in `translate'

Same thing happens for edit as well.

Expected behavior

Users index page should load

Actual behavior

Exception 500

How to reproduce

Here is the bug template to reproduce the same:

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  **ruby '3.0.0'** 
  # Use local changes or ActiveAdmin master.
  if ENV["ACTIVE_ADMIN_PATH"]
    gem "activeadmin", path: ENV["ACTIVE_ADMIN_PATH"], require: false
  else
    gem "activeadmin", github: "activeadmin/activeadmin", require: false
  end

  # Change Rails version if necessary.
  gem "rails", "6.0.0"

  gem "sprockets", "3.7.2"
  gem "sassc-rails", "2.1.2"
  gem "sqlite3", "1.4.1", platform: :mri
  gem "activerecord-jdbcsqlite3-adapter", "60.0", platform: :jruby
  gem "jruby-openssl", "0.10.5", platform: :jruby
end

require "active_record"

ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :active_admin_comments, force: true do |_t|
  end

  create_table :users, force: true do |t|
    t.string :full_name
  end
end

require "action_controller/railtie"
require "action_view/railtie"
require "active_admin"

class TestApp < Rails::Application
  config.root = __dir__
  config.session_store :cookie_store, key: "cookie_store_key"
  secrets.secret_token = "secret_token"
  secrets.secret_key_base = "secret_key_base"

  config.eager_load = false
  config.logger = Logger.new($stdout)

  config.hosts = "www.example.com"
end

class ApplicationController < ActionController::Base
  include Rails.application.routes.url_helpers
end

class User < ActiveRecord::Base
end

ActiveAdmin.setup do |config|
  # Authentication disabled by default. Override if necessary.
  config.authentication_method = false
  config.current_user_method = false
end

Rails.application.initialize!

ActiveAdmin.register_page "Dashboard" do
  menu priority: 1, label: proc { I18n.t("active_admin.dashboard") }
  content do
    "Test Me"
  end
end

ActiveAdmin.register User do
end

Rails.application.routes.draw do
  ActiveAdmin.routes(self)
end

require "minitest/autorun"
require "rack/test"
require "rails/test_help"

# Replace this with the code necessary to make your test fail.
class BugTest < ActionDispatch::IntegrationTest

  def test_admin_root_success?
    get admin_root_url
    assert_match "Test Me", response.body # has content
    assert_match "Users", response.body # has 'Your Models' in menu
    assert_response :success
  end

  def test_admin_users
    User.create! full_name: "John Doe"
    get admin_users_url
    assert_match "John Doe", response.body # has created row
    assert_response :success
  end

  private

  def app
    Rails.application
  end
end

The issue seems to have been caused by incompatibility of formtastic with ruby 3.0.0
Issue reference Formtastic Issue 1325

Might need to update the dependency version of formtastic.

Source