From 1f41dd3b7d542d52ad96d062269b381786b023aa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafael=20Mendon=C3=A7a=20Fran=C3=A7a?=
 <rafaelmfranca@gmail.com>
Date: Wed, 2 Apr 2014 18:22:02 -0300
Subject: [PATCH] Warn users if Simple Form is not configured in the
 application

---
 lib/simple_form.rb         | 7 +++++++
 lib/simple_form/railtie.rb | 7 +++++++
 test/simple_form_test.rb   | 8 ++++++++
 3 files changed, 22 insertions(+)

diff --git a/lib/simple_form.rb b/lib/simple_form.rb
index ac8c3905..75c49be0 100644
--- a/lib/simple_form.rb
+++ b/lib/simple_form.rb
@@ -36,6 +36,12 @@ to
 See https://github.com/plataformatec/simple_form/pull/997 for more information.
   WARN
 
+  @@configured = false
+
+  def self.configured? #:nodoc:
+    @@configured
+  end
+
   ## CONFIGURATION OPTIONS
 
   # Method used to tidy up errors.
@@ -235,6 +241,7 @@ See https://github.com/plataformatec/simple_form/pull/997 for more information.
   # Default way to setup SimpleForm. Run rails generate simple_form:install
   # to create a fresh initializer with all configuration values.
   def self.setup
+    @@configured = true
     yield self
   end
 end
diff --git a/lib/simple_form/railtie.rb b/lib/simple_form/railtie.rb
index 35b722be..f4144964 100644
--- a/lib/simple_form/railtie.rb
+++ b/lib/simple_form/railtie.rb
@@ -3,5 +3,12 @@ require 'rails/railtie'
 module SimpleForm
   class Railtie < Rails::Railtie
     config.eager_load_namespaces << SimpleForm
+
+    config.after_initialize do
+      unless SimpleForm.configured?
+        warn '[Simple Form] Simple Form is not configured in the application and will use the default values.' +
+          ' Use `rails generate simple_form:install` to generate the Simple Form configuration.'
+      end
+    end
   end
 end
diff --git a/test/simple_form_test.rb b/test/simple_form_test.rb
index 662e13d9..351b1aae 100644
--- a/test/simple_form_test.rb
+++ b/test/simple_form_test.rb
@@ -6,4 +6,12 @@ class SimpleFormTest < ActiveSupport::TestCase
       assert_equal SimpleForm, config
     end
   end
+
+  test 'setup block configure Simple Form' do
+    SimpleForm.setup do |config|
+      assert_equal SimpleForm, config
+    end
+
+    assert_equal true, SimpleForm.configured?
+  end
 end