命名范围 - 绑定变量的错误数量

Question

我有以下命名范围：

named_scope :report_search, lambda { |search|
  {
    :conditions => ["rep_name like ? or rep_id like ? or rep_symbol like ? or rep_issue like ?", search]
  }
}

当我运行它时，我收到错误消息：

wrong number of bind variables

如果有人能帮我弄清楚代码是错的，我将不胜感激。

非常感谢

Answer 1

如果您不想重复输入，可以使用命名绑定变量。

named_scope :report_search, lambda { |search|
  {
    :conditions => ["  rep_name   LIKE :search OR 
                       rep_id     LIKE :search OR 
                       rep_symbol LIKE :search OR 
                       rep_issue  LIKE :search", :search => search]
  }
}

Answer 2

绑定语句中的每个问号都需要一个变量。如果它们完全相同，则需要多次重复：

named_scope :report_search, lambda { |search|
  {
    :conditions => ["rep_name like ? or rep_id like ? or rep_symbol like ? or rep_issue like ?", search, search, search, search]
  }
}