Dojo 网格嵌套 json [英] Dojo grid nested json

问题描述

我想要一个连接到输出以下 json 的服务器 url 的 dojo 网格:{标识符:id"项目:[{id:1"，姓名:John"，大学:{姓名:XXX"，地址:YYY"}}].

I'd like to have a dojo grid which connects to a server url which outputs the following json : {identifier : "id" items : [ { id: "1", name: "John", university : { name: "XXX", address: "YYY" } }].

基本上我有一个嵌套的 json.我想将大学名称和大学地址表示为网格中的单独列.

Basically I have a nested json. I would like to represent the university name and University address as separate columns in the grid.

我尝试使用 dojox.grid.DataGrid 对象并创建网格布局，但不知道如何引用嵌套元素，并且 university.name 和 university.address 似乎不起作用.我正在使用 dojo 1.6.1.

I tried using the dojox.grid.DataGrid object and creating a gird layout, but do not know how to refer to the nested elments and university.name and university.address don't seem to work. I am using dojo 1.6.1.

有人指点吗?

这是我使用的js代码:

This is the js code I use :

    dojo.require("dojox.grid.DataGrid");
    dojo.require("dojo.data.ItemFileReadStore");

    dojo.addOnLoad(function(){
    // our test data store for this example:
    var jsonStore = new dojo.data.ItemFileReadStore({
        url: '/MainDeployer/ajax/users/get.json'
    });

    var layoutUsers = [
       [{
               field: "name",
               name: "Name",
               width: 10
           },
           {
               field: "university.name",
               name: "University Name",
               width: 10
           },
           {
               field: "university.address",
               name: "University Address",
               width: 'auto'
           }]];

    // create a new grid:
    var grid = new dojox.grid.DataGrid({
        query: {},
        store: jsonStore,
        clientSort: true,
        rowSelector: '20px',
        structure: layoutUsers
    },
    document.createElement('div'));

    dojo.byId("usersTable").appendChild(grid.domNode);

    grid.startup();
});

谢谢，克里斯蒂安

推荐答案

你用的是什么商店?看看 dojo.data.ItemFileReadStore 文档，有一个像你这样的例子:http://dojotoolkit.org/reference-guide/dojo/data/ItemFileReadStore.html#item-structure

What kind of store are you using? Have a look at the dojo.data.ItemFileReadStore documentation, there is an example with a situation like yours: http://dojotoolkit.org/reference-guide/dojo/data/ItemFileReadStore.html#item-structure

这将帮助您通过一次调用fetch"方法来获取所有项目.如果由于某些原因它由于不同的 json 结构而无法工作，您可以继续使用 ItemFileReadStore ，并创建一个循环遍历 json 中所有对象的函数，并使用 loadItem 方法以这种方式逐个添加项目(它不漂亮，但它有效):

This would help you fetching all the items with a single call to the method "fetch". If for some reasons it doesn't work due to the different json structure, you can continue using ItemFileReadStore , and create a function that loops over all the objects in your json and uses the loadItem method for adding items one by one in this way (it's not beautiful but it works):

var myData = {"items" : []};
var myStore = new dojo.data.ItemFileWriteStore({data: myData});
var myLayout = [{
    field: 'name',
    name: 'Name',
    width: '200px'
},
{
field: 'universityName',
name: 'University Name',
width: '100px'
},
{
field: 'universityAddress',
name: 'University Address',
width: '60px'
}];
var myGrid;

dojo.addOnLoad(function(){
    myGrid = new dojox.grid.DataGrid({
        store: myStore,
        structure: myLayout
    }, document.createElement('div'));
    dojo.byId("myGridContainer").appendChild(myGrid.domNode); 
    myGrid.startup();

    dojo.xhrGet({
        url: myURL,
        handleAs: "json",
        headers: {
            "Content-Type": "application/json; charset=uft-8", 
            "Accept" : "application/json"
        },
        load: function(responseObject, ioArgs) {
            myList = responseObject;
            dojo.forEach(myList.items, function(element) {     
                myStore.newItem({"name": element.name, 
                    "universityName": element.university.name,
                    "universityAddress": element.university.address});
            });
        })
    });
}

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