Question

Rails 4.x / ruby 2.x

我正在使用复选框选择记录以进行其他处理。我想在使用sort或paginate时使复选框变粘。

<% @documents.each do |document| %>
  <tr>

    <td><%= check_box_tag "document_ids[]", document.id %></td>
    <td><%= document.id %></td>
    <td><%= link_to document.document_title, document %></td>
     <removed irrelevent code>
<% end %>
<%= paginate @documents %>

  Send Checked Documents as an attachment :  <%= submit_tag "Next" %>

以下是我的控制器的两个defs。如果用户只选中了复选框，没有排序或分页（kaminari），并单击下一个按钮，则index.multiple def / view将显示已检查的文档。

但是，如果我选中一个框然后尝试排序或转到下一页，我会丢失已检查的框，它们将被取消选中。

def index
    #----------------------------------------------------------------
    # index is the method for the main documents listing. We need to pass parameters for sorting (sortable in application_helper) and
    # kaminari's paginate
    #-----------------------------------------------------------------
    @documents = Document.all
    if params[:direction] && params[:sort] then    # missing sort and direction params cause error. This filters for missing and provide a default view
      @documents = Document.order(params[:sort] + ' ' + params[:direction]).page params[:page]
    else
      @documents = Document.order(:id).page params[:page]
    end
  end

  # ------------------------------------------------- index multiple ------------------------------------

  def index_multiple
    #-------------------------------------------------------------------------
    # index multiple is for the page after the index. The user has checked checkboxes and those
    # items will be displayed.
    # ---------------------------------------------------------------------------------
    $doc_ids = params[:document_ids]     # get the parameters from the checkboxes. send_message converted the params to integers


   if params[:document_ids] then

        @documents = Document.find(params[:document_ids])
     else
       redirect_to  documents_path, :notice => "****************  You must select at least one item **************"
   end

  end

使复选框变粘的最佳方法是什么？

Answer 1

根据rails docs，您可以使用第三个参数将复选框设置为选中/取消选中：http://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html#method-i-check_box_tag

将您的代码修改为以下内容并查看其是否有效：

<%= check_box_tag "document_ids[]", document.id, params[:document_ids].include?(document.id) %>

如何在rails中粘贴checkbox_tag？

1 个答案: