How to add data attribute in Rails form select tag?
Try:
{class: "form-control selectpicker", "data-live-search" => "true" }
<%= f.select :food_id, options_for_select(Food.all.map{|c| [c.name, c.id]}, f.object.food_id), {}, {class: "form-control selectpicker", data: {"live-search": true}} %>
<%= f.select(:plan_id, {},{}, {'v-model'=>"plan_id",'@change'=>"onChange", class: "form-control"}) do %><% Plan.all.each do |plan| %> <%= content_tag(:option,"#{plan.name.upcase} #{plan.max_items} #{number_to_currency(plan.price)}", value:plan.id, :data => {items: plan.max_items, price: plan.price}) %><% end%><% end%>