Remove NameError rescue in page base (#920)

lib/administrate/page/base.rb

@@ -33,8 +33,6 @@ def attribute_field(dashboard, resource, attribute_name, page)
 
       def get_attribute_value(resource, attribute_name)
         resource.public_send(attribute_name)
-      rescue NameError
-        nil
       end
 
       attr_reader :dashboard, :options

spec/example_app/db/migrate/20170702033920_add_timestamp_to_payments.rb

@@ -0,0 +1,5 @@
+class AddTimestampToPayments < ActiveRecord::Migration[5.1]
+  def change
+    change_table(:payments, &:timestamps)
+  end
+end

spec/example_app/db/schema.rb

@@ -79,6 +79,8 @@
 
   create_table "payments", id: :serial, force: :cascade do |t|
     t.integer "order_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
     t.index ["order_id"], name: "index_payments_on_order_id"
   end