Fix translated_inputs not properly setting up user block capture (#4)

Author: tkalliom

README.md

@@ -37,9 +37,6 @@ end
 ```
 ## In your Active Admin resource definition
 
-**Important note:** I'm working on a fix for #4 because after AA deprecated and then removed [#form_buffers](https://github.com/activeadmin/activeadmin/pull/3486) the
-syntax shown below for form declaration doesn't work as is. See comments in code and [discussion](#4) to fix it until I found a solution.
-
 ```ruby
 
 # For usage with strong parameters you'll need to permit them
@@ -54,7 +51,6 @@ index do
   actions
 end
 
-# This was the original syntax proposed in this gem, however currently it doesn't work
 form do |f|
   # ...
   f.translated_inputs "Translated fields", switch_locale: false do |t|
@@ -64,19 +60,6 @@ form do |f|
   # ...
 end
 
-# Instead you have to nest the block inside an #inputs block and the title
-# should be passed to the inputs method
-form do |f|
-  # ...
-  f.inputs "Translated fields" do
-    f.translated_inputs 'ignored title', switch_locale: false do |t|
-      t.input :title
-      t.input :description
-    end
-  end
-  # ...
-end
-
 # You can also set locales to show in tabs
 # For example we want to show English translation fields without tab, and want to show other languages within tabs
 form do |f|

lib/active_admin/globalize/form_builder_extension.rb

@@ -8,6 +8,10 @@ def translated_inputs(name = "Translations", options = {}, &block)
         available_locales = options.fetch(:available_locales, I18n.available_locales)
         switch_locale = options.fetch(:switch_locale, false)
         default_locale = options.fetch(:default_locale, I18n.default_locale)
+        if block_given?
+          # If this translated_inputs is nested inside an inputs, AA has already set this
+          template.assigns[:has_many_block] = true
+        end
         template.content_tag(:div, class: "activeadmin-translations") do
           template.content_tag(:ul, class: "available-locales") do
             available_locales.map do |locale|