Documentation Index
Fetch the complete documentation index at: https://filla.io/docs/llms.txt
Use this file to discover all available pages before exploring further.
What computed fields are
Computed fields are Airtable field types that calculate their values automatically. You cannot edit them directly in Airtable or in Filla. On forms, they can be displayed to respondents for reference, but respondents cannot change their values.Supported computed field types
| Airtable field type | What it shows |
|---|---|
| Auto Number | Sequential record number automatically assigned by Airtable |
| Formula | Result of an Airtable formula |
| Rollup | Aggregated value from linked records |
| Count | Count of linked records |
| Lookup (Multiple Lookup Values) | Values looked up from linked records |
| Created Time | When the record was created |
| Last Modified Time | When the record was last modified |
| Created By | Who created the record |
| Last Modified By | Who last modified the record |
| Button | Airtable button field (displayed as read-only) |
| External Sync Source | Source identifier for externally synced records |
| AI Text | AI-generated text value |
| Manual Sort | Internal sort position |
Why display computed fields?
Displaying computed fields on a form is useful when respondents need context from calculated values before making decisions. For example:- Show a Rollup field that totals previous order amounts so a respondent knows how much they’ve spent
- Show a Formula result like “Approval Status” so the respondent knows the current state of a record before editing it
- Show a Count of linked records so the respondent knows how many items are already attached
How they work in the editor
Add a computed field to your form the same way you’d add any other field. Drag it from the field palette or click to add it. In the canvas, it shows a “Read-only” tag to indicate it cannot be edited. The settings panel for computed fields shows a simplified set of options:- Title and Description: the field title and optional help text
- Conditional visibility: visibility rules still apply to computed fields
Lookup fields on forms
Lookup fields pull a value from a linked record. Filla resolves these values live on the form — respondents don’t need to submit or reload to see them update.- On a new submission form, a lookup field is empty until the respondent picks a linked record. As soon as they pick one, the looked-up value appears below.
- If the respondent changes or removes the linked record, the lookup value updates immediately to match.
- On an edit mode form, lookup fields show the current values from whatever records are linked to the record being edited.
- If multiple linked records are selected, the lookup shows all of their values (flattened into a single list).
Lookup fields are display-only. Respondents can’t edit the looked-up values directly. To change a lookup value, update the source record in Airtable, or update the underlying linked record that the lookup is pulling from.
Common questions
Can computed fields be used in conditional logic?
Can computed fields be used in conditional logic?
Yes. You can reference computed field values in show/hide conditions and other filter rules, the same as editable fields.
What if a formula field returns no value?
What if a formula field returns no value?
The field will show as blank on the form. No error is shown. It displays nothing until the formula produces a result.
Can I use a formula field value in variable text?
Can I use a formula field value in variable text?
Yes. Computed fields can be referenced with
@ mentions in field labels, descriptions, text blocks, and email templates.