[英]In Rails, how do you get a variable that holds a database field name into a condition?
以下控制器代碼不起作用。 有辦法嗎？
@m = "jan"
@teams = Team.find(:all, :conditions => ["@m = ?", true], :order => "name asc")
謝謝。
如果使用Rails 3.x
@teams = Team.where(@m => true).order("name asc").all
您需要插入字符串！
@m = "jan"
@teams = Team.find(:all, :conditions => ["#{@m} = ?", true], :order => "name asc")
順便說一下，檢查布爾值時的數據庫查詢應使用IS運算符
@m = "jan"
@teams = Team.find(:all, :conditions => ["#{@m} IS ?",true], :order => "name asc")
Rails如何將文本框的名稱而不是布爾值輸入數據庫？
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