Ransack: return nothing when form submitted and no search values entered

Question

I have the search form and the results of the search posted on the same page.

As I understand it: the default for ransack is that if a form is submitted with no values inputted into the search fields, then all records of that particular resource are returned.

How can I change it so that if a user does a search where they enter no values into the search fields, then none of the records are returned?

Ransack Documentation

This doesn't work:

if params["q"].values.present? # Always returns true because an array of empty strings returns true from method call: present?
  # do this
else
  # do that
end

Neither does this:

if params["q"].values.empty? # Always returns true because an array of empty strings returns true from method call: empty?
  # do this
else
  # do that
end

Checking for params["q"].present? does not work either because every time a form is submitted, whether there are values entered or not, this is what gets passed through to the server:

# showing with pry
[1] pry> params[:q] 
  => {"namesearch_start"=>"",
      "city_cont"=>"",
     }
[2] pry> params[:q].present?
  => true # always returns true

So params["q"] will always be present, whether there are values entered or not.

Answer 1

What you can do is reject any values that are blank.

if params[:q].reject { |_, v| v.blank? }.any? # .none? for inverted
  # Handle search
else
  # Handle no query scenario
end

Or

if params[:q].values.reject(&:blank?).any? # .none? for inverted
  # Handle search
else
  # Handle no query scenario
end