2

我正在使用插件 Kaminari 进行分页。我正在对我的应用程序进行 Ajaxifing，但遇到了问题。我有一个带有分页数据的表单以及用于过滤数据的表单（都通过 Ajax）。开始时分页效果很好，特定页面的 url 是'/admin/rooms?page=X'。在 ajax 过滤那些 '/admin/rooms/filter?page=X' 的 url 更改之后。我可以通过以下方式指定分页时要触发的操作：

<%= paginate @rooms, :params => {:controller => 'rooms', :action => 'index'}, :remote => true %>

但随后变量@rooms 在索引中被重置，我再次对未过滤的数据进行分页。

任何想法我该如何解决？

这是一些代码

  • 房间控制器.rb：

    class Admin::RoomsController < AdminController
def index
        @rooms = Room.all
        @rooms = Kaminari.paginate_array(@rooms).page(params[:page]).per(5)
        @filter_values = [['Room number', 'room_number'], ['Person count', 'person_count'], ['Room class', 'room_class']]
end

def filter
        case params[:filter_by]
        when 'room_number'
                @rooms = Room.find(:all, :conditions => ["CAST(room_number AS VARCHAR) LIKE ?", "#{params[:filter_value]}%"])
        when 'person_count'
                @rooms = Room.find(:all, :conditions => ["person_count LIKE ?", "#{params[:filter_value]}%"])
        else
                @rooms = Room.joins(:room_class).where("lower(class_name) LIKE '#{params[:filter_value]}%'")
        end

        @rooms = Kaminari.paginate_array(@rooms).page(params[:page]).per(5)
        respond_to do |format|
                format.html { redirect_to admin_rooms_path }
                format.js
        end
end

  • index.html.erb：

    <%= label_tag 'Filter:  ' %>
<%= form_tag(filter_admin_rooms_path, :remote => true) do %>
        <%= select_tag :filter_by, options_for_select(@filter_values) %>
        <%= text_field_tag :filter_value %>
        <%= submit_tag 'Filter', :disable_with => 'Filtering..' %>
<% end %>

...

<div id="rooms_list">
        <%= render 'admin/rooms/shared/rooms_list' %>
</div>

  • _rooms_list.html.erb：

    <div id="paginator">
        <%= paginate @rooms, :remote => true %>
</div>
<table class="table_listing" style="width: 60%">
        ...
</table>
4

1 回答 1

3

通过再次将参数传递给索引并强制分页路由到“rooms#index”而不是当前页面来解决问题（虽然不是 Ajax 的可见原因）。

  • _rooms_list.html.erb：

    <%= paginate @rooms, :params => {:controller => 'rooms', :action => 'index'}, :remote => true %>

参数通过 GET 从当前参数变量传递到索引。

  • 房间控制器.rb：

    def index
        if params[:filter_value].nil?
                @rooms = Room.all
        else
                @rooms = test_filter(params[:filter_value])
        end

        @rooms = Kaminari.paginate_array(@rooms).page(params[:page]).per(5)
        @errors = flash[:errors] || []
        @filter_values = [['Room number', 'room_number'], ['Person count', 'person_count'], ['Room class', 'room_class']]
end

def filter
        case params[:filter_by]
        when 'room_number'
                @rooms = Room.find(:all, :conditions => ["CAST(room_number AS VARCHAR) LIKE ?", "#{params[:filter_value]}%"])
        when 'person_count'
                @rooms = Room.find(:all, :conditions => ["person_count LIKE ?", "#{params[:filter_value]}%"])
        else
                @rooms = Room.joins(:room_class).where("lower(class_name) LIKE '#{params[:filter_value]}%'")
        end

        @rooms = Kaminari.paginate_array(@rooms).page(params[:page]).per(5)
        params[:authenticity_token] = nil
        params[:commit] = nil

        respond_to do |format|
                format.html { redirect_to admin_rooms_path }
                format.js
        end
end

def test_filter(val)
        rooms = Room.find(:all, :conditions => ["CAST(room_number AS VARCHAR) LIKE ?", "#{val}%"])
        rooms
end

test_filter 当然是删除/重命名。我将一些我认为不应该在分页时传递到下一页的参数归零。

于 2011-11-01T09:22:29.730 回答