--- displayed_sidebar: customerReference --- import { TypeList } from "docs-ui" # CustomerGroupDTO The customer group details. `","description":"Holds custom data in key-value pairs.","optional":true,"defaultValue":"","expandable":false,"children":[]}]},{"name":"phone","type":"`null` \\| `string`","description":"The phone of the customer.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"groups","type":"`object`[]","description":"The groups of the customer.","optional":false,"defaultValue":"","expandable":false,"children":[{"name":"id","type":"`string`","description":"The ID of the group.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"name","type":"`string`","description":"The name of the group.","optional":false,"defaultValue":"","expandable":false,"children":[]}]},{"name":"metadata","type":"`Record`","description":"Holds custom data in key-value pairs.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"created_by","type":"`null` \\| `string`","description":"Who created the customer.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"deleted_at","type":"`null` \\| `string` \\| `Date`","description":"The deletion date of the customer.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"created_at","type":"`string` \\| `Date`","description":"The creation date of the customer.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"updated_at","type":"`string` \\| `Date`","description":"The update date of the customer.","optional":false,"defaultValue":"","expandable":false,"children":[]}]},{"name":"metadata","type":"`Record`","description":"Holds custom data in key-value pairs.","optional":true,"defaultValue":"","expandable":false,"children":[]},{"name":"created_by","type":"`null` \\| `string`","description":"Who created the customer group.","optional":true,"defaultValue":"","expandable":false,"children":[]},{"name":"deleted_at","type":"`null` \\| `string` \\| `Date`","description":"The deletion date of the customer group.","optional":true,"defaultValue":"","expandable":false,"children":[]},{"name":"created_at","type":"`string` \\| `Date`","description":"The creation date of the customer group.","optional":true,"defaultValue":"","expandable":false,"children":[]},{"name":"updated_at","type":"`string` \\| `Date`","description":"The update date of the customer group.","optional":true,"defaultValue":"","expandable":false,"children":[]}]} expandUrl="https://docs.medusajs.com/learn/fundamentals/data-models/manage-relationships#retrieve-records-of-relation" sectionTitle="CustomerGroupDTO"/>