#57 Create Model Through Text Field

最新推荐文章于 2025-08-05 17:05:13 发布

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本文介绍了一种在产品管理中高效设置类别的方法：通过下拉菜单选择现有类别或直接输入新类别名称进行创建。这种方式提高了用户体验并简化了管理工作流程。

Let's say you provide a select menu for setting which category a given product belongs to, but you also want the option of creating a new category by typing the name in a text field. See a great way to do that in this episode.

<!-- views/products/_form.rhtml -->
<p>
  <label for="product_category_id">Category:</label><br />
  <%= f.collection_select :category_id, Category.find(:all), :id, :name, :prompt => "Select a Category" %>
  or create one:
  <%= f.text_field :new_category_name %>
</p>
# models/product.rb
belongs_to :category
attr_accessor :new_category_name
before_save :create_category_from_name

def create_category_from_name
  create_category(:name => new_category_name) unless new_category_name.blank?
end