Link To Current Page With Params

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• Source code for this episode

For additional security, you should whitelist the params that you want to allow in the links.

# app/helpers/search_helper.rb
module SearchHelper
  def current_page_params
    # Modify this list to whitelist url params for linking to the current page
    request.params.slice("query", "filter", "sort")
  end
end

<%= link_to "with foo", current_page_params.merge(foo: true) %>
```erb