Fix nested params

Author: platbr

lib/activeadmin/resource_dsl.rb

@@ -15,6 +15,25 @@ def json_editor
           end
           object.attributes = { key => data }
         end
+        object.nested_attributes_options.keys.each {|_nested_key|
+          nested_attributes_with_index = params[resource_request_name]["#{_nested_key}_attributes"]
+          next if nested_attributes_with_index.nil?
+          nested_klass = _nested_key.to_s.singularize.camelize.constantize
+          nested_klass.columns_hash.select { |_key, attr| attr.type.in? [:json, :jsonb] }.keys.each do |key|
+            nested_attributes_with_index.each {|_index, nested_attributes|
+              next unless nested_attributes.key? key
+              json_data = nested_attributes[key]
+              data = if json_data == 'null' || json_data.blank?
+                       {}
+                     else
+                       JSON.parse(json_data)
+              end
+              object.send(_nested_key).each {|nested_object|
+                nested_object.attributes = { key => data }
+              }
+            }
+          end
+        }
       end
     end
   end