PG ::语法错误：错误：语法错误或接近 “AS” 错误的Rails 4.1

Question

我刚刚升级导轨4.1和正在此错误：

PG::SyntaxError: ERROR: syntax error at or near "AS" 
LINE 1: SELECT COUNT(count_column) FROM (SELECT * AS count_column F... 
              ^
: SELECT COUNT(count_column) FROM (SELECT * AS count_column FROM (SELECT thread_id,  max(id) as id FROM "messages" WHERE 1=0 AND (thread_id IS NOT NULL) GROUP BY thread_id) last JOIN messages ON messages.id = last.id LIMIT 5 OFFSET 0) subquery_for_count 

这里是方法：

- as_myself do 
    %li#messages-open.icon-btn.email 
     - message_count = inbox_messages.count.is_a?(Hash) ? inbox_messages.count.values.first : inbox_messages.count 
     - if(message_count.present? && message_count > 0) 
     %span= message_count 

Answer 1

rails 4.1中的新语法是count(:all)解决了我的问题。