JavaScript DataSource Schema

In this blog entry, we review the ShieldUI DataSource schema definition.
Shield UI DataSource provides a series of schema settings that describe how the data is parsed and mapped into suitable JavaScript objects. The schema is a JavaScript object that is specified either through the schema setting during initilization, or using the schema property after the DataSource has been initialized:

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var ds = new shield.DataSource( {     schema: {         //specifies the path to the data array in the result object after read()         //can be a function accepting the result object and returning an array         data: "result.data",                   //specifies the path to the total item count in the result object after read()         //can be a function accepting the result object and returning a number         count: "result.count",                   //specifies field types and maps fields to other field names         fields: {             productId: {                 //map data from the "id" field to a new "productId" field                 path: "id",                 //convert data values to numbers                 type: "number"             },             productName: {                 path: "name"             },             launched: {                 path: "launchDate",                 type: "date"             },             discontinued: {                 type: "bool"             }         }     } }); ds.read().then(function () {     var dataView = ds.view;     //dataView is an array of objects, where each object has a field "productId"     //containing numeric values, "productName" containing strings, "launched"     //containing Date objects and "discontinued" containing Boolean values });