MySQL에서는 작동하지만 Postgres SQL에서는 작동하지 않습니다

Question

이 루비를 레일스 쿼리에 포스트 쓰 데이터베이스로 쓰는 방법을 알고 싶습니다. 그것은 MySQL을 통해 작동하지만, 포스트 그레스에 오류 반환 :

루비 레일 쿼리

response_array = Vote. 
       by_leaderboard_date_range. 
       joins(:user). 
       joins(:event_poll_relationship). 
       select('users.*, sum(points_earned) as total'). 
       group('user_id'). 
       order('total DESC'). 
       limit(20) 

ERROR

2013-07-31T13:02:43.430333+00:00 app[web.3]: ActiveRecord::StatementInvalid (PG::Error: ERROR: argument of JOIN/ON must be type boolean, not type integer 
2013-07-31T13:02:43.430333+00:00 app[web.3]: LINE 1: ...ers"."id" = "votes"."user_id" LEFT JOIN events on events.esp... 
2013-07-31T13:02:43.430333+00:00 app[web.3]:               ^
2013-07-31T13:02:43.430333+00:00 app[web.3]: : SELECT users.*, sum(points_earned) as total FROM "votes" INNER JOIN "event_poll_relationships" ON "event_poll_relationships"."id" = "votes"."event_poll_relationship_id" INNER JOIN "users" ON "users"."id" = "votes"."user_id" LEFT JOIN events on events.espn_event_id WHERE (events.espn_event_id = event_poll_relationships.espn_event_id AND events.start_date_time >= '2013-07-28 00:00:00' AND events.start_date_time <= '2013-12-31 00:00:00') GROUP BY user_id ORDER BY total DESC LIMIT 20): 

투표의 모델

class Vote < ActiveRecord::Base 

    scope :by_espn_event_id, lambda {|espn_event_id| joins(:event_poll_relationship).joins('LEFT JOIN events on events.espn_event_id').where('event_poll_relationships.espn_event_id = ? AND events.espn_event_id = event_poll_relationships.espn_event_id', espn_event_id) } 
    scope :by_leaderboard_date_range, joins(:event_poll_relationship).joins('LEFT JOIN events on events.espn_event_id').where('events.espn_event_id = event_poll_relationships.espn_event_id AND events.start_date_time >= ? AND events.start_date_time <= ?',LeaderBoardRange.find(1).start_date.to_datetime,LeaderBoardRange.find(1).end_date.to_datetime) 

을 691,363,210

RAW는 SQL

SELECT users.*, sum(points_earned) as total FROM "votes" INNER JOIN "event_poll_relationships" ON "event_poll_relationships"."id" = "votes"."event_poll_relationship_id" INNER JOIN "users" ON "users"."id" = "votes"."user_id" LEFT JOIN events on events.espn_event_id WHERE (events.espn_event_id = event_poll_relationships.espn_event_id AND events.start_date_time >= '2013-07-28 00:00:00' AND events.start_date_time <= '2013-12-31 00:00:00') GROUP BY user_id ORDER BY total DESC LIMIT 20) 

감사

Answer 1

솔루션

문제가 범위에 ON 가입했다가 생성됩니다. 해결책을 다음과 같은 사항에 대해

scope :by_espn_event_id, lambda {|espn_event_id| joins(:event_poll_relationship).joins('LEFT JOIN events ON (events.espn_event_id = event_poll_relationships.espn_event_id)').where('event_poll_relationships.espn_event_id = ?', espn_event_id) } 
    scope :by_leaderboard_date_range, joins(:event_poll_relationship).joins('LEFT JOIN events ON (events.espn_event_id = event_poll_relationships.espn_event_id)').where('events.start_date_time >= ? AND events.start_date_time <= ?',LeaderBoardRange.find(1).start_date.to_datetime,LeaderBoardRange.find(1).end_date.to_datetime) 

루비 레일 QUERY MySQL과 포스트 그레스

# calculate leaderboard by date range 
    response_array = Vote. 
     by_leaderboard_date_range. 
     joins(:user). 
     joins(:event_poll_relationship). 
     select('users.*, sum(points_earned) as total'). 
     group('users.id, user_id'). 
     order('total DESC'). 
     limit(20)