RailsAdminDuration

RailsAdminDuration adds a duration field type to RailsAdmin. It stores durations in seconds (like Rails's Duration type) and can be used with integer columns.

Add the following to your Gemfile:

gem 'rails_admin_duration'

To use RailsAdminDuration with a field, manually specify the field's type:

rails_admin do
  field :time_active, :duration
end