---
title: Using Expressions as Filters on a Form
slug: neurons-for-itsm/admin-user-help/enu/latest/using-expressions-as-filters-on-a-form
createdAt: 2026-07-14T19:16:38.514Z
---

- [Using Hidden Expressions on a Form](docId\:m3aktJinwGBd112fBjbLO)
- [About Using Expressions as Filters on a Form](docId\:m3aktJinwGBd112fBjbLO)
- [Example: Adding an Expression Filter to the Customer Field for Incidents](docId\:m3aktJinwGBd112fBjbLO)

### Using Hidden Expressions on a Form

1. From the Configuration console, click **Build > Business Objects**.
2. Open a business object.
3. Click the **Forms** tab.
4. Open a form.
5. Highlight a field and click the **Control Properties** tab.
6. Click the **Visible Expression** field and click the **expression** button. The application displays the Expression Editor.
7. Enter an expression such as **$(if Status == "Logged" then true else false)**.
8. Click **Save**.
9. Save the form.

### About Using Expressions as Filters on a Form

Each link field on a form displays a specific business object that you select in the **Display Field** field under the **Control Properties** tab. Any business object supports a selection of fields by which you can filter instances of the business object. In some cases, however, the business object does not support the field that you need.

For example, when you create a new incident, you click the **search** icon :inlineImage[]{src="https://api.archbee.com/api/optimize/parib0MC3hVoUNdfQdnac/iC9g16N4f04yC8YLXFG1l_searchmag.png" alt caption size="10" width="14" height="13"} on the **Customer** field to view a list of customers (or users). By default, all customers appear in this list whether their status is set to *active* or otherwise. If you only want to see active customers, you need a way to filter the list. You do that by adding an expression to the **Customer** field.

### Example: Adding an Expression Filter to the Customer Field for Incidents

To add an expression filter to the **Customer** field of an **Incident** form, do the following:

1. From the Configuration console, click **Build > Business Objects**.
2. Open the **Incident** business object.
3. Click the **Forms** tab.
4. Open the **Incident.CustomerOwnershipForm** form.
5. Highlight the **Customer** field and click the **Control Properties** tab.
6. Click the** Filter Expression** field and enter **$(\[OtherObject]Status == "Active")**.
7. Click **Save**.
8. From the application, click **Refresh** on the **Incident** workspace to refresh the **Incident** workspace.

:::Paragraph{indent="1"}
Now, when you search for a customer name in a new incident, only the names of active customers appear in the list.
:::

:::hint{type="info" indent="1"}
In the expression editor you can use any case to define expression. For example, writing \`ToString\` or \`tostring\` expression perform the same action.
:::