- leondu
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rails集成extjs
原文见:http://extjs.com/tutorial/using-ext-grid-ruby-rails
E文好的就直接看吧。
- 下载extjs,将需要的文件放到对应的文件夹(具体需要的文件见第二步的列表)
- 在layout中加入javascript引用
java 代码 - <%= stylesheet_link_tag "../javascripts/ext/resources/css/ext-all.css" %>
- <%= javascript_include_tag "ext/adapter/prototype/prototype.js" %>
- <%= javascript_include_tag "ext/adapter/prototype/scriptaculous.js" %>
- <%= javascript_include_tag "ext/adapter/prototype/effects.js" %>
- <%= javascript_include_tag "ext/adapter/prototype/ext-prototype-adapter.js" %>
- <%= javascript_include_tag "ext/ext-all-debug.js" %>
- <%= yield %>
- 在view中增加显示grid的div
java 代码 - <%= javascript_include_tag "grid-paging.js" %>
- <div id="movies_grid" style="border:5px solid #99bbe8; overflow:hidden; width:650px;"></div>
4.使用javascript搭建一个grid
url: '/movie/grid_data' 指定了数据源
Ext.grid.Grid('movies_grid'... 则指定了grid出现在哪个div中。
java 代码 - var grid;
- var ds;
-
- Ext.onReady(function(){
- init_grid();
- });
-
- function init_grid() {
- ds = new Ext.data.Store({
- proxy: new Ext.data.HttpProxy({url: '/movie/grid_data'}),
-
- reader: new Ext.data.JsonReader({
- root: 'Movies',
- totalProperty: 'Total',
- id: 'id'
- }, [
- {name: 'title', mapping: 'title'},
- {name: 'plot', mapping: 'plot'},
- {name: 'release_year', mapping: 'date'},
- {name: 'genre', mapping: 'genre'},
- {name: 'mpaa', mapping: 'mpaa'},
- {name: 'directed_by', mapping: 'directed_by'}
- ]),
-
- remoteSort: true
- });
-
- var cm = new Ext.grid.ColumnModel
- ([{
- id: 'title',
- header: "Title",
- dataIndex: 'title',
- width: 250
- },{
- header: "Release Year",
- dataIndex: 'release_year',
- width: 75
- },{
- header: "MPAA Rating",
- dataIndex: 'mpaa',
- width: 75
- },{
- header: "Genre",
- dataIndex: 'genre',
- width: 100
- },{
- header: "Director",
- dataIndex: 'directed_by',
- width: 150
- }]);
-
- cm.defaultSortable = true;
-
- grid = new Ext.grid.Grid('movies_grid', {
- ds: ds,
- cm: cm,
- selModel: new Ext.grid.RowSelectionModel({singleSelect:true}),
- autoExpandColumn: 'title'
- });
-
- grid.render();
- ds.load({params:{start:0, limit:20}});
- }
5.实现服务器端
list方法只是为了显示list.rhtml,其实也可以不写,grid_data才是真正的幕后英雄,注意其中的render方法直接返回text,不使用layout 。
java 代码 - class MovieController < ApplicationController
-
- def list
- end
-
- # Called from the list page to get the movie list data to populate the grid.
- def grid_data
- start = (params[:start] || 1).to_i
- size = (params[:limit] || 20).to_i
- sort_col = (params[:sort] || 'id')
- sort_dir = (params[:dir] || 'ASC')
-
- page = ((start/size).to_i)+1
-
- @movie_pages = Paginator.new(self, Movie.count, size, page)
-
- @movies = Movie.find(:all,
- :select => "id, title, plot, date, genre, mpaa, directed_by",
- :limit=>@movie_pages.items_per_page,
- :offset=>@movie_pages.current.offset,
- :order=>sort_col+' '+sort_dir)
-
- return_data = Hash.new()
- return_data[:Total] = @movie_pages.item_count
- return_data[:Movies] = @movies.collect{|u| {:id=>u.id,
- :title=>u.title,
- :plot=>u.plot,
- :date=>u.date,
- :genre=>u.genre,
- :mpaa=>u.mpaa,
- :directed_by=>u.directed_by} }
- render :text=>return_data.to_json, :layout=>false
- end
- end
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