Make :create and :update map to :new and :edit.

lib/simple_form/components/base.rb

@@ -11,6 +11,12 @@ module SimpleForm
       delegate :template, :object, :object_name, :attribute, :column,
                :reflection, :input_type, :options, :to => :@builder
 
+      # When action is create or update, we still should use new and edit
+      ACTIONS = {
+        :create => :new,
+        :update => :edit
+      }
+
       def self.basename
         @basename ||= name.split("::").last.underscore.to_sym
       end
@@ -88,14 +94,19 @@ module SimpleForm
       #
       #  Take a look at our locale example file.
       def translate(default='')
-        action  = template.params[:action] if template.respond_to?(:params)
-        lookups =  []
-        lookups << :"#{object_name}.#{action}.#{reflecion_name_or_attribute}" if action.present?
+        lookups = []
+        lookups << :"#{object_name}.#{lookup_action}.#{reflecion_name_or_attribute}"
         lookups << :"#{object_name}.#{reflecion_name_or_attribute}"
         lookups << :"#{reflecion_name_or_attribute}"
         lookups << default
         I18n.t(lookups.shift, :scope => :"simple_form.#{basename.to_s.pluralize}", :default => lookups)
       end
+
+      # The action to be used in lookup.
+      def lookup_action
+        action = template.controller.action_name.to_sym
+        ACTIONS[action] || action
+      end
     end
   end
 end

test/components/label_test.rb

@@ -46,6 +46,18 @@ class LabelTest < ActionView::TestCase
   end
 
   test 'label should use i18n based on model, action, and attribute to lookup translation' do
+    @controller.action_name = "new"
+    store_translations(:en, :simple_form => { :labels => { :user => {
+      :new => { :description => 'Nova descrição' }
+    } } } ) do
+      params.merge!(:action => 'new')
+      with_label_for @user, :description, :text
+      assert_select 'label[for=user_description]', /Nova descrição/
+    end
+  end
+
+  test 'label should fallback to new when action is create' do
+    @controller.action_name = "create"
     store_translations(:en, :simple_form => { :labels => { :user => {
       :new => { :description => 'Nova descrição' }
     } } } ) do

test/support/mock_controller.rb

@@ -1,4 +1,9 @@
 class MockController
+  attr_accessor :action_name
+
+  def action_name
+    @action_name || "edit"
+  end
 
   def url_for(*args)
     "http://example.com"