Getting the DataManager

Each Workbook instance contains exactly one DataManager.

This instance is created internally when the Workbook is initialized.

To access it:

var dataManager = spread.dataManager();

The returned object is the central entry point for:

• Creating tables

• Managing relationships

• Defining structured data models

• Preparing data for component binding

All structured data operations within a Workbook must go through this DataManager instance.

Workbook-Owned DataManager

The DataManager retrieved from spread.dataManager() is owned by the Workbook.

SpreadJS components such as:

• TableSheet

• GanttSheet

• ReportSheet

• Data Chart

operate exclusively on the Workbook’s internal DataManager.

Because of this:

• You cannot replace the Workbook’s DataManager.

• You cannot inject an external DataManager into a Workbook.

This ensures that all structured components share a consistent data model within the same Workbook.

Next Step

With access to the DataManager, you can:

• Create tables using addTable

• Define schema and column behavior

• Establish relationships

• Create views for presentation

The following section explains how to create and configure tables.