kendo UI 数据源和复杂的 JSON

Question

我想用从 web 服务返回的复杂 json 填充网格。 我的 json 包含两件事：

• 数据：包含将填充网格的记录的数组
• columns: 带有网格配置（布局）的数组

我已经通过指定schema.data 成功地用“数据”填充了网格。

我的问题是我如何从数据源中获取“列”（来自 JSON），这样我就可以在我的 gridOptions 中设置网格属性。 有办法吗？

这是我的 JSON

{
  "data": [
    {
      "id": 0,
      "firstname": "Dalton",
      "lastname": "Holden",
      "gender": "male",
      "email": "daltonholden@tellifly.com",
      "phone": "871-407-2973",
      "address": "22 National Drive, Brenton, Louisiana",
      "birthday": "21/04/1965",
      "currency": "GBP"
    },
    {
      "id": 1,
      "firstname": "Allyson",
      "lastname": "Odom",
      "gender": "female",
      "email": "allysonodom@tellifly.com",
      "phone": "922-548-2725",
      "address": "44 Quincy Street, Thynedale, Georgia",
      "birthday": "28/08/1961",
      "currency": "CHF"
    },
    {
      "id": 2,
      "firstname": "Sweet",
      "lastname": "Branch",
      "gender": "male",
      "email": "sweetbranch@tellifly.com",
      "phone": "880-593-2244",
      "address": "81 Fenimore Street, Veguita, Missouri",
      "birthday": "08/08/1953",
      "currency": "AUD"
    }
  ],

  "columns": [
    {
      "field": "firstname",
      "title": "Frist Name",
      "width": 200,
      "attributes": {
        "class": "",
        "style": "text-align: left;"
      },
      "headerAttributes": {
        "class": "table-header-cell",
        "style": "text-align: left;"
      }
    },
    {
      "field": "lastname",
      "title": "Last Name",
      "attributes": {
        "class": "",
        "style": "text-align: left;"
      },
      "headerAttributes": {
        "class": "table-header-cell",
        "style": "text-align: left;"
      }
    },
    {
      "field": "gender",
      "title": "Gender",
      "attributes": {
        "class": "",
        "style": "text-align: left;"
      },
      "headerAttributes": {
        "class": "table-header-cell",
        "style": "text-align: left;"
      }
    },
    {
      "field": "email",
      "title": "e-mail",
      "attributes": {
        "class": "",
        "style": "text-align: left;"
      },
      "headerAttributes": {
        "class": "table-header-cell",
        "style": "text-align: left;"
      }
    },
    {
      "field": "phone",
      "title": "Phone Number",
      "attributes": {
        "class": "",
        "style": "text-align: right;"
      },
      "headerAttributes": {
        "class": "table-header-cell",
        "style": "text-align: right;"
      }
    },
    {
      "field": "address",
      "title": "Address",
      "attributes": {
        "class": "",
        "style": "text-align: left;"
      },
      "headerAttributes": {
        "class": "table-header-cell",
        "style": "text-align: left;"
      }
    },
    {
      "field": "birthday",
      "title": "Birthday",
      "attributes": {
        "class": "",
        "style": "text-align: center;"
      },
      "headerAttributes": {
        "class": "table-header-cell",
        "style": "text-align: center;"
      }
    },
    {
      "field": "currency",
      "title": "Currency",
      "attributes": {
        "class": "",
        "style": "text-align: center;"
      },
      "headerAttributes": {
        "class": "table-header-cell",
        "style": "text-align: center;"
      }
    }
  ]
}

这是我的代码：

var customersSource = new kendo.data.DataSource({
        transport: {
            read: {
                url: "http://....",
                dataType: "json"
            }
        },
        schema: {
            data: "data"
        }
    });

$scope.mainGridOptions = {
        dataSource: customersSource,
        //columns: Here it should be something like --> customersSource.columns,
        height: 500,
        scrollable: true,
        selectable: true
    };

Answer 1

架构将只负责获取和解析您的数据源所需的数据，以便创建视图、过滤器、排序等。

没有内置方式来处理来自一个 Ajax 请求的“混合”内容。

不过，您可以找到一种解决方法。使用 requestEnd 事件，访问丢失的数据，并保存以供以后使用。

var customersSource = new kendo.data.DataSource({
    transport: {
        read: {
            url: "http://....",
            dataType: "json"
        }
    },
    schema: {
        data: "data"
    },
    requestEnd: function(e) {
        // According to the documentation, this gives you a reference to the datasource instance itself.
        this.whatever = e.response.columns;
    }
});

现在你可以在以后使用这个东西。

$scope.mainGridOptions = {
    dataSource: customersSource,
    columns: customersSource.whatever,
    height: 500,
    scrollable: true,
    selectable: true
};