---
id: gk-gravityboard-card-writable-fields
title: "Filter - gk/gravityboard/card/writable-fields"
sidebar_label: "gk/gravityboard/card/writable-fields"
tags:
  - "1.4.6"
---

# Filter: gk/gravityboard/card/writable-fields

Filter the mapped card fields a create or update may write.

Removing a key here leaves the mapping in place but stops the card API reading that key from the request, so a value the editor never showed cannot be overwritten by one it never held.

## Parameters

| Name | Type | Description |
|------|------|-------------|
| $mapped_fields | `array<string,string>` | Card field key =&gt; mapped field ID. |
| $feed | `array` | The feed data. |

### Since

- 1.4.6

### Source

Defined in `src/Card.php` at line 707