Code bellow represent store configured to use rest proxy.Everything works just fine when store has one dirty record.When store has multiple records to be updated it does not send them as batch. I have tried many options of JsonWriter properties but with no luck.Is RestProxy designed only for one Record???
 <ext:Store runat="server" AutoSync ="false"  ID ="storeCrud"   >
                                <ext:RestProxy Url="~/api/crud/getData" >
                                        <ext:JsonReader Root="data" TotalProperty="total"></ext:JsonReader>
                                        <ext:JsonWriter   WriteAllFields ="true"/>
                                        <ext:Parameter Name="Accept" Value="application/json"></ext:Parameter>
                                    <API Update="~/api/crud/saveData"></API>
                                    <API Create ="~/api/crud/createData"></API>
                                <ext:Model runat="server">
                                        <ext:ModelField Name="companyId" Type="Int" />
                                        <ext:ModelField Name="company" />
                                        <ext:ModelField Name="price" Type="Float" />
                                        <ext:ModelField Name="change" Type="Float" />
                                        <ext:ModelField Name="pctChange" Type="Float" />
                                        <ext:ModelField Name="lastChange" Type="Date" DateFormat="M/d hh:mmtt" />

                               <BeforeSync Handler ="console.log('before sync')" ></BeforeSync>
                               <Write Handler ="console.log('complete')"></Write>