Support SimpleForm/Formtastic forms without object.

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### enhancements
 
 ### bug fix
+  Fix issue with SimpleForm/Formtastic forms without object. (by [@nashby](https://github.com/nashby))
 
 ## 2.2.0 (February 13, 2018)
 

lib/enumerize/hooks/formtastic.rb

@@ -5,7 +5,7 @@ module Hooks
     module FormtasticFormBuilderExtension
 
       def input(method, options={})
-        klass = object.to_model.class
+        klass = object && object.to_model.class
 
         if klass.respond_to?(:enumerized_attributes) && (attr = klass.enumerized_attributes[method])
           options[:collection] ||= attr.options

lib/enumerize/hooks/simple_form.rb

@@ -17,7 +17,7 @@ def input_field(attribute_name, options={})
       private
 
       def add_input_options_for_enumerized_attribute(attribute_name, options)
-        klass = object.to_model.class
+        klass = object && object.to_model.class
 
         if klass.respond_to?(:enumerized_attributes) && (attr = klass.enumerized_attributes[attribute_name])
           options[:collection] ||= attr.options

test/formtastic_test.rb

@@ -124,4 +124,12 @@ def persisted?
 
     assert_select 'input[type=text]'
   end
+
+  it 'does not affect forms without object' do
+    concat(semantic_form_for('') do |f|
+      f.input(:name)
+    end)
+
+    assert_select 'input[type=text]'
+  end
 end

test/simple_form_test.rb

@@ -128,4 +128,12 @@ def persisted?
 
     assert_select 'input.string'
   end
+
+  it 'does not affect forms without object' do
+    concat(simple_form_for('') do |f|
+      f.input(:name)
+    end)
+
+    assert_select 'input.string'
+  end
 end