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Modify Fields in Your Compass Entity-Relationship Diagram

You can modify your existing entity-relationship diagram in Compass to plan changes to your data model without affecting your actual data.

About this Task

In the Data Modeling tab, you can:

Add or remove fields
Change field data types
Rename fields

Note

Any changes you make to your entity-relationship diagram won't affect your actual database.

Before You Begin

You must have an existing diagram in Compass to modify the fields. To create a new diagram, see Generate an Entity-Relationship Diagram in Compass.

Steps

Add a New Field

To add a new field to a collection in your entity-relationship diagram:

Open the Data Modeling tab

In the left sidebar, click Data Modeling.

Open your entity-relationship diagram

From the Data Modeling tab, open your diagram.

Add a new field

To add a new field, click the icon in the upper-right corner of one of your collection nodes. A new field appears in the collection node.

Once you add a field, you can edit the field's properties, including:

Renaming the field.
Changing the field's data type.
Adding relationships.

Rename a Field

To rename a field in your entity-relationship diagram:

Open the Data Modeling tab

In the left sidebar, click Data Modeling.

Open your entity-relationship diagram

From the Data Modeling tab, open your diagram.

Open the Field Properties side panel

Click one of your fields in the diagram. The field side panel opens on the right side of the screen.

Change a Field's Data Type

To change the data type of a field in your entity-relationship diagram:

Open the Data Modeling tab

In the left sidebar, click Data Modeling.

Open your entity-relationship diagram

From the Data Modeling tab, open your diagram.

Open the Field Properties side panel

Click one of your fields in the diagram. The field side panel opens on the right side of the screen.

Select a new data type

In the Datatype drop-down menu, select the datatypes that you want to assign to the field. Because data in MongoDB has a flexible schema model, you can specify multiple data types for a field. If a field contains multiple data types, Compass labels the field as (mixed) in the diagram.

Remove a Field

To delete a field from your diagram:

Open the Data Modeling tab

In the left sidebar, click Data Modeling.

Open your entity-relationship diagram

From the Data Modeling tab, open your diagram.

Open the Field Properties side panel

Click one of your fields in the diagram. The field side panel opens on the right side of the screen.

Delete the field

In the side panel, click the icon.

Next Steps

Learn More

Back

Modify Collections

Manage Relationships