ruby-on-rails - 在 rails admin 中，设置一个文本字段并给它一个最大长度

Question

我觉得这应该是显而易见的，但我在文档中找不到它。

我正在使用 rails_admin 构建一个简单的 CMS。

考虑一下:

 config.model Article do
    list do
      field :title
      field :created_at
      field :updated_at
    end
    edit do
      field :title
      field :description do
        required true #this line is pseudo code! What is the real thing?
        maxlength 600 #ditto this line
      end
    end
  end

如何将这两行伪代码转换为“required”和“maxlength”的真实标记？

Answer 1

要获得所需的输出，您的配置应如下所示:

config.model Article do
  list do
    field :title
    field :created_at
    field :updated_at
  end
  edit do
    field :title
    field :description, :string do  #use second parameter to set field type
      required true #this will just set a hints text
      #to set max length use:
      html_attributes do
       {:maxlength => 600} #dont use 600 as maxlength for a string field. It will break the UI
      end
    end
  end
end