Parse default value in Service Dialog

When serializing the dialog, it should return an array of values rather than a string if force_multi_value is true

app/models/dialog_field_serializer.rb

@@ -16,6 +16,10 @@ def serialize(dialog_field, all_attributes = false)
       "dialog_field_responders" => dialog_field.dialog_field_responders.map(&:name)
     }
 
+    if dialog_field.try(:force_multi_value) && dialog_field.default_value.present?
+      extra_attributes["default_value"] = dialog_field.default_value.split(",")
+    end
+
     if dialog_field.dynamic?
       dynamic_values = dialog_field.trigger_automate_value_updates
       extra_attributes["values"] = dynamic_values

spec/models/dialog_field_serializer_spec.rb

@@ -138,7 +138,10 @@
         allow(dialog_field).to receive(:values).and_return("values")
       end
 
-      it "serializes the category name and description" do
+      it "serializes the category name, description and default value" do
+        default_values = "one,two"
+        dialog_field.update_attributes(:default_value => default_values)
+
         expect(dialog_field_serializer.serialize(dialog_field))
           .to eq(expected_serialized_values.merge(
                    "resource_action"         => "serialized resource action",
@@ -147,7 +150,8 @@
                      :category_id          => "123",
                      :category_name        => "best category ever",
                      :category_description => "best category ever"
-                   }
+                   },
+                   "default_value"           => %w(one two)
           ))
       end
     end