Mysql 迁移错误-错误：SQL语法中有错误；检查相应的手册

无法确定语法sql文件迁移的错误。请帮忙：

我运行rakedb:migrate

错误：

Mysql2:：Error：您的SQL语法有错误；请查看与MySQL服务器版本对应的手册，以了解第1行“更新照片集投票数”\u count=0，rating=0，其中id不在（）/home/user/myapp/appmame/db/migrate/20131110162613\u重新计算照片\u rating.rb:8:IN“up”

class RecalculatePhotosRating < ActiveRecord::Migration
  def up
    if Vote.where("subject_type='Photo' and rating > 1").count > 0
      ActiveRecord::Base.connection.execute "DELETE FROM votes WHERE subject_type='Photo' AND rating <= 5"
      ActiveRecord::Base.connection.execute "UPDATE votes SET rating=1 WHERE subject_type='Photo'"
    end
    pids = Vote.where(subject_type: 'Photo').pluck(:subject_id).uniq
    ActiveRecord::Base.connection.execute "UPDATE photos SET votes_count = 0, rating = 0 WHERE id NOT IN (#{pids.join(', ')})"
    ActiveRecord::Base.connection.execute "UPDATE photos SET rating=(SELECT COUNT(*) FROM votes WHERE votes.subject_type='Photo' AND subject_id=photos.id) WHERE id IN (#{pids.join(', ')})"
    ActiveRecord::Base.connection.execute "UPDATE photos SET votes_count=(SELECT COUNT(*) FROM votes WHERE votes.subject_type='Photo' AND subject_id=photos.id) WHERE id IN (#{pids.join(', ')})"
  end

  def down
  end
end

class RecreactEphotosRating1”）。计数>0
ActiveRecord:：Base.connection.execute“从投票中删除主题和评级您必须检查
pids
查询是否返回空结果：

class RecalculatePhotosRating < ActiveRecord::Migration
  def up
    if Vote.where("subject_type='Photo' and rating > 1").count > 0
      ActiveRecord::Base.connection.execute "DELETE FROM votes WHERE subject_type='Photo' AND rating <= 5"
      ActiveRecord::Base.connection.execute "UPDATE votes SET rating=1 WHERE subject_type='Photo'"
    end
    pids = Vote.where(subject_type: 'Photo').pluck(:subject_id).uniq
    unless pids.empty?
      ActiveRecord::Base.connection.execute "UPDATE photos SET votes_count = 0, rating = 0 WHERE id NOT IN (#{pids.join(', ')})"
      ActiveRecord::Base.connection.execute "UPDATE photos SET rating=(SELECT COUNT(*) FROM votes WHERE votes.subject_type='Photo' AND subject_id=photos.id) WHERE id IN (#{pids.join(', ')})"
      ActiveRecord::Base.connection.execute "UPDATE photos SET votes_count=(SELECT COUNT(*) FROM votes WHERE votes.subject_type='Photo' AND subject_id=photos.id) WHERE id IN (#{pids.join(', ')})"
    end
  end

  def down
  end
end

class RecreactEphotosRating1”）。计数>0
ActiveRecord:：Base.connection.execute“删除我插入的主题和评级的投票，除非pids.empty？”？同样的错误。