ruby-on-rails - Rails 语法错误

Question

我看不到它的错误在哪里：

news = News.find(:all, :conditions => [":simulation_id => session[:sim_id] AND :created_at > session[:last_login]"])

Answer 1

试试这个：

news = News.find(:all, :conditions => ["simulation_id = ? AND created_at > ?", session[:sim_id], session[:last_login]])

Answer 2

您的条件字符串不会按预期进行评估：

[":simulation_id => session[:sim_id] AND :created_at > session[:last_login]"]

将其更改为

["simulation_id = ? AND created_at > ?", session[:sim_id], session[:last_login]]

Answer 3

您也可以调用Model.all，而不是Model.find(:all)看起来像这样：

news = News.all(:conditions => ["simulation_id = ? AND created_at > ?", session[:sim_id], session[:last_login]])