transport.update: only add changed fields in the request body

[Cory]

Hi,

transport: {
    read: {
        url: serviceURL + entity.ClassName
    },
    update: {
        url: function (data) {
            var key = "(" + data.ID + "," + data.NetworkID + "," + data.From + "," + data.To + ")";

            return serviceURL + entity.ClassName + key;
        },
        type: "PATCH",
        data: function (data) {

        var row = $("#elementGrid").data("kendoGrid").dataSource.get(data.ID);

        var updateData = {};

        $.each(row.dirtyFields, function (key, value) {
            updateData[key] = row[key];
        });

        return updateData;
    }
  }
}

[Cory]

I forgot to mention that I've also tried setting up the read and update as functions, but then I ran into issues with the odata expressions not being applied automatically to the read url ($skip/$top/etc).

I tried getting them from the options parameter, which actually worked pretty well until I got to the filter property. Is there an easy way to convert the field/operator/value objects into qualified odata $filter strings without having to manually build them? It wouldn't be the end of the world having to go that route, but I was hoping not to have to deal with deciding whether or not to quote the value.

[Angel Petrov]

Hello,

In order to remove the unneeded properties one can use the parameterMap function. Here is an example that removes the UnitPrice field from the object that represents the grid row modified data.

transport: {
                               .....
                                parameterMap: function(options, operation) {
                                    if (operation !== "read") {
                                        delete options.UnitPrice;

                                        return options;
                                    }
                                }
                            },
                            pageSize: 20,
                            schema: {
                                model: {
                                    id: "ProductID",
                                    fields: {
                                        ProductID: { editable: false, nullable: true },
                                        ProductName: { validation: { required: true } },
                                        UnitPrice: { type: "number", validation: { required: true, min: 1} },
                                        Discontinued: { type: "boolean" },
                                        UnitsInStock: { type: "number", validation: { min: 0, required: true } }
                                    }
                                }
                            }

As for converting a filter to an OData filter you can use the OData parameterMap public function. Here is an example.

kendo.data.transports["odata"].parameterMap({ filter: { filters: [ {field: "ProductName", operator: "eq", value: "test"} ] } }, "read")

Regards,
Angel Petrov
Progress Telerik