Drop down with predefined values

• How will i add predefined values to a collection_select? Like...

  US

  UK

  开发者_如何学PythonAUS

  PAK

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The collection_select helper is used for when you want the options within the select element to come from a collection of ActiveRecord models. For your requirements you should use the select helper in combination with options_for_select:

<%= select(:country, :country_id,
  options_for_select([['US', 1], ['UK', 2], ['AUS', 3], ['PAK', 4]])) %>

• select API documentation