Generate an Entity-Relationship Diagram in Compass

Open the Data Modeling tab

In the left sidebar, click Data Modeling.

Click Generate diagram

If you have existing diagrams saved in the Data Modeling tab, you can create a new diagram by clicking Generate new diagram in the upper-right corner of the screen.

Name your diagram

Select your MongoDB connection

Use the drop-down menu to select which MongoDB connection to use to generate your diagram. The Active label appears under any currently active connection name.

Select your database

Use the drop-down menu to select which database to use for your data model diagram.

Select collections

Use the checkboxes to select which collections to include in your data model diagram.

(Optional) Toggle automatically inferred relationships

In the :guilabel:` Select collections` modal, you can choose to Automatically infer relationships between collections. When enabled, Compass analyzes the selected collections and adds relationships based on indexed fields that contain references to other collections.

You can also manually add and edit relationships after you generate your diagram.

Click Generate

Compass generates an entity-relationship diagram with the selected collections and displays it in the current tab.

After you generate a diagram, Compass displays the existing diagrams in the Data Modeling tab.