dhtmlxGrid in a Rails App

Here is my experience using dhtmlxGrid in ROR app.
In general, it is a nice component and comes with lots of sample code. Their support and knowledge is good. Their document list json as supported data type but json support is a subset of XML type. Even if you load the grind in JSON, when you serialize the grid, you get xml back and cell id is not sent back. In rails project, to generate xml, when you use xml builder, make sure, you don't indent. Grid dosn't load xml string with indentation.
Use Builder::XmlMarkup.new (no indent)