Fix the determination about profile_completed_at

ruby/lib/jam_ruby/models/user.rb

@@ -422,7 +422,7 @@ module JamRuby
       end
 
       # check if the profile looks complete
-      if musician_instruments.length > 0 || genre_players.length > 0
+      if genre_players.length > 0 || has_set_an_instrument
         User.where(id: self.id).update_all(profile_completed_at: Time.now)
       end
 
@@ -506,6 +506,10 @@ module JamRuby
       end
     end
 
+    def has_set_an_instrument
+      musician_instruments.length > 1 || (musician_instruments.length == 1 && musician_instruments.first.instrument_id != 'other')
+    end
+
     def send_lesson_poke(first = false)
       if first && self.remind_take_lesson_times > 0
         return