Question

我正在尝试构建一个可排序且可搜索的列表。

这两个函数都可以自行运行，但是当我搜索并尝试对结果进行排序时，我会再次获取所有元素，而不仅仅是搜索到的元素。

我的观点如下：

<%= form_tag(user_subnets_path, :method => "get", id: "search-form") do %>
  <%= text_field_tag :search, params[:search], placeholder: "Search Subnets" %>
  <%= submit_tag "Search" %>
<% end %>



<% if @subnets.blank? and params[:search]%>
  <h4>There are no subnets containing the term "<%= params[:search] %>".</h4>
<% else %>
  <table>
    <tr>
      <th><%= sortable "name" %></th>
      <th><%= sortable "CIDR", "CIDR" %></th>
    </tr>

    <% @subnets.each do |subnet| %>
      <tr>
        <td><%= subnet.name %></td>
        <td><%= subnet.CIDR %></td>
        <td><%= link_to 'Show', user_subnet_path(@user, subnet) %></td>
        <td><%= link_to 'Edit', edit_user_subnet_path(@user, subnet) %></td>
      </tr>
    <% end %>

  </table>
<% end %>

相应的控制器

...
def index
  #TODO: keep params after submit -> Search + order at once
  @user = User.find(params[:user_id])
  @subnets = @user.subnets.order(sort_column+ ' ' +sort_direction).search(params[:search])
  respond_to do |format|
    format.html
    format.csv { send_data Subnet.to_csv(@subnets) }
  end
end
...

private

def subnet_params
  params.require(:subnet).permit(:name, :CIDR)
end

def sort_column
  if params[:id]
    Device.column_names.include?(params[:sort]) ? params[:sort] : "IP"
  else
    Subnet.column_names.include?(params[:sort]) ? params[:sort] : "name"
  end
end

def sort_direction
  %w[asc desc].include?(params[:direction]) ? params[:direction] : "asc"
end

来自模型的search函数

def self.search(search)
  if search
    where("subnets.name LIKE ? OR subnets.CIDR LIKE ?",  "%#{search}%", "%#{search}%")
  else
    all
  end
end

application_helper

module ApplicationHelper
  def sortable(column, title = nil)
    title ||= column.titleize
    direction = (column == sort_column && sort_direction == "asc") ? "desc" : "asc"
    link_to title, :sort => column, :direction => direction
  end
end

有一种简单的方法吗？

我正在运行Rails 5.1.4

提前致谢！

Answer 1

似乎没关系，现在只需对应用程序助手sortable方法和最后一行进行少许更改

尝试以下

def sortable(column, title = nil)
    title ||= column.titleize
    direction = (column == sort_column && sort_direction == "asc") ? "desc" : "asc"
    link_to title, request.query_parameters.merge({sort: column, direction: direction})
end

希望有所帮助

在Ruby on Rails中排序后保留搜索结果

1 个答案: