<%= form.label :map_location, label %> <%= form.fields_for :map_location, map_location do |m_l_fields| %> <%= render_map(map_location, form: m_l_fields) %> <%= m_l_fields.hidden_field :latitude %> <%= m_l_fields.hidden_field :longitude %> <%= m_l_fields.hidden_field :zoom %> <% end %>