Rails / Postgres: “must appear in the GROUP BY clause or be used in an aggregate function”

Question

I\'m using this method:

  def self.lines_price_report(n)
    Income.group(\'date(filled_at)\').having(\"date(filled_at) > ?\", Date.today - n).sum(:lines_         


        

Answer 1

I guess this is because you use date(filled_at) in GROUP BY but just filled at in ORDER. As I guess order is taken from default scope you need to overwrite it by reorder. I would suggest:

Income.sum(:lines_price).
    group('date(filled_at)').
    having("date(filled_at) > ?", Date.today - n).
    reorder("date(filled_at) ASC")