How to create “Upcoming birthdays” module in Rails?

Question

I have a table \"users\" with a column \"date_of_birth\" (DATE format with day, month, year). In frontend I need to list 5 upcoming birthdays.

Spent ages trying to w

Answer 1

If your database is mysql, the following is probably faster:

scope :birthday_next_week, (lambda {
  where('DayOfYear(date_of_birth) >= 7
     And DayOfYear(date_of_birth) - DayOfYear(curdate()) Between 0 and 6) Or
   (MOD(YEAR(curDate()),4) = 0) And MOD(YEAR(curDate()),100) != 0
    And (DayOfYear(date_of_birth) + 366 - DayOfYear(curdate())) % 366 < 7) Or
     (DayOfYear(date_of_birth) + 365 - DayOfYear(curdate())) % 365 < 7').
    order('DATE_FORMAT( date_of_birth, "%m-%d" ) ASC')
})

Edit: changed to make it work in the week before new years eve / leap years.