Custom ransacker predicates to query date range

index.html.erb

<%= search_form_for @q, url: production_status_changes_path, class: 'form-inline' do |f| %>
  <%=  f.label 'Create At' %>
  <%= f.search_field :created_at_end_of_day_lteq, class: 'form-control input-sm',  'datepicker' => true %>
<% end %>

ransack.rb

# config/initializers/ransack.rb
#
# Custom ransack predicate to simplify query for date range
#
# See lib/ransack.rb in ransack gem
# See wiki https://github.com/activerecord-hackery/ransack/wiki/Custom-Predicates

Ransack.configure do |config|
  config.add_predicate 'end_of_day_lteq',
    arel_predicate: 'lteq',
    formatter: proc { |v| v.end_of_day },
end