Kendo DataSource:如何在不发送两个 httprequest 的情况下在获取之前设置过滤器

问题描述

环境:

• 剑道版本:2013.1.319

• 数据源:

• kendo version: 2013.1.319

• dataSource:

productsDataSource = new kendo.data.DataSource({
    type: "odata",
    transport: {
        read: "http://www.mydomain.com/odata.svc/products",
        dataType: "json",
        contentType: "application/json"
    }
    schema: {
        type: "json",
        data: function(data){
            return data.value;
        },
        total: function(data){
            return data['odata.count'];
        },
        model: product
    },
    pageSize: 50,
    serverPaging: true,
    serverFiltering: true,
    serverSorting: true
});

获取数据:

Get data:

productsDataSource.filter([{ field: "Id", operator: "eq", value: 5 }]);//这将发送一个http请求

productsDataSource.filter([{ field: "Id", operator: "eq", value: 5 }]); //this will send an httprequest

productsDataSource.fetch(function (e) {tempDataStorage = e.items;//处理数据的更多逻辑；});

productsDataSource.fetch(function (e) { tempDataStorage = e.items; //more logic to dealing with the data;});

问题:

1. 需要使用dataSource的fetch方法进行数据处理(widgets初始化、数据绑定等)；
2. 在获取之前设置过滤器时避免发送两个http请求；
3. 需要在运行时更改过滤条件.

推荐答案

productsDataSource._filter = { logic: 'and', filters: [
{ field: "Id", operator: "eq", value: 5 }]};

我发现这行得通.将内部属性设置为完整的过滤器对象.然后您可以在之后调用 fetch.但是，我还没有找到一种在不触发提取的情况下更改页面大小的方法.

I've found this to work. Set the internal property to a full filter object. You can then call fetch afterwards. I've not yet found a way to change the page size without triggering a fetch however.

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