method

time_zone_options_for_select

v5.1.7 - Show latest stable - 0 notes - Class: ActionView::Helpers::FormOptionsHelper

time_zone_options_for_select(selected = nil, priority_zones = nil, model = ::ActiveSupport::TimeZone) public

Returns a string of option tags for pretty much any time zone in the world. Supply an ActiveSupport::TimeZone name as selected to have it marked as the selected option tag. You can also supply an array of ActiveSupport::TimeZone objects as priority_zones, so that they will be listed above the rest of the (long) list. (You can use ActiveSupport::TimeZone.us_zones as a convenience for obtaining a list of the US time zones, or a Regexp to select the zones of your choice)

The selected parameter must be either nil, or a string that names an ActiveSupport::TimeZone.

By default, model is the ActiveSupport::TimeZone constant (which can be obtained in Active Record as a value object). The only requirement is that the model parameter be an object that responds to all, and returns an array of objects that represent time zones.

NOTE: Only the option tags are returned, you have to wrap this call in a regular HTML select tag.

Show source

# File actionview/lib/action_view/helpers/form_options_helper.rb, line 569
      def time_zone_options_for_select(selected = nil, priority_zones = nil, model = ::ActiveSupport::TimeZone)
        zone_options = "".html_safe

        zones = model.all
        convert_zones = lambda { |list| list.map { |z| [ z.to_s, z.name ] } }

        if priority_zones
          if priority_zones.is_a?(Regexp)
            priority_zones = zones.select { |z| z =~ priority_zones }
          end

          zone_options.safe_concat options_for_select(convert_zones[priority_zones], selected)
          zone_options.safe_concat content_tag("option".freeze, "-------------", value: "", disabled: true)
          zone_options.safe_concat "\n"

          zones = zones - priority_zones
        end

        zone_options.safe_concat options_for_select(convert_zones[zones], selected)
      end

time_zone_options_for_select

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