gistfile1.rb

# Get from form:
# params[:date]
# params[:categories]

def index
  quote_requests_in_context
end

private

def quote_requests_in_context
  base = QuoteRequest
  if params[:date]
    base = base.where(:date => params[:date])
  end

  if params[:categories]
    base = base.includes(:sub_categories).where(:sub_categories => SubCategory.find(params[:categories]))
  end

  base.all
end