How to Defer Commands

const session = documentStore.openSession();

// Define a patchRequest object for the PatchCommandData used in the 'defer' below
const patchRequest = new PatchRequest();
patchRequest.script = "this.Supplier = 'suppliers/2-A';";

// 'defer' is available in the session's advanced methods 
session.advanced.defer(

    // Define commands to be executed:
    // i.e. Put a new document
    new PutCommandDataBase("products/999-A", null, null, {
        "Name": "My Product",
        "Supplier": "suppliers/1-A"
        "@metadata": { "@collection": "Products" }
    }),
    
    // Patch document
    new PatchCommandData("products/999-A", null, patchRequest, null),

    // Force a revision to be created
    new ForceRevisionCommandData("products/999-A"),

    // Delete a document
    new DeleteCommandData("products/1-A", null)
);

// All deferred commands will be sent to the server upon calling SaveChanges
await session.saveChanges();

}

The following commands implement the ICommandData interface and can be deferred:

• PutCommandDataBase
• DeleteCommandData
• DeletePrefixedCommandData
• PatchCommandData
• BatchPatchCommandData
• PutAttachmentCommandData
• DeleteAttachmentCommandData
• CopyAttachmentCommandData
• MoveAttachmentCommandData
• CountersBatchCommandData
• PutCompareExchangeCommandData
• DeleteCompareExchangeCommandData
• CopyTimeSeriesCommandData
• TimeSeriesBatchCommandData
• ForceRevisionCommandData

session.advanced.defer(...commands);