Question

In select_tag, using options_from_collection_for_select , how to set selected element in select box element in ruby on rails

 select_tag "server", options_from_collection_for_select(@server, "id", "name")

like selected=”selected” set for an option

Answer 1

In select_tag, when you use options_from_collection_for_select use fourth parameter of options_from_collection_for_select that is value(id in your example) to be selected

<%= select_tag "people", options_from_collection_for_select(@people, "id", "name",2)%>

In the above example, 2 is selected id, you can put id of which option you wish to select in select_tag

For more information ref link below

http://apidock.com/rails/ActionView/Helpers/FormOptionsHelper/options_from_collection_for_select

Cheers!