roles = Role.find_all_by_simulation_id(session[:sim_id])
forum_posts = Post.find(:all, :conditions => ["role_id = ? AND created_at > ?", roles.map(&:id), session[:last_login]])
错误:
SQLite3::SQLException: near ",": syntax error: SELECT * FROM "posts" WHERE (role_id = 1,2,3,4 AND created_at > '2009-05-21 11:54:52')
答案 0 :(得分:2)
改变这个:
forum_posts = Post.find(:all, :conditions => ["role_id = ? AND created_at > ?", roles.map(&:id), session[:last_login]])
到
forum_posts = Post.find(:all, :conditions => ["role_id IN (?) AND created_at > ?", roles.map(&:id), session[:last_login]])
答案 1 :(得分:1)
我认为Role_id中的逗号= 1,2,3,4。如果你想在整数上进行OR样式比较,我认为它必须是role_id ='1,2,3,4',如果它是一个字符串或role_id IN(1,2,3,4)。