---
title: Post Object field mapping
slug: content-marketing-platform/docs/post-object-field-mapping
docTags: 
createdAt: 2026-07-22T20:21:11.854Z
---

Optimizely Content Marketing Platform (CMP) supports mapping the ACF `Post Object` field to the structured content `Wordpress Taxonomy` type field.

:::hint{type="info"}
**📘 Note**
You must select which `Channel` you want to link with the `Post Object Field`.
:::

**JSON example**

```javascript
{
  "core": {
    "key": "acf_post_object_field",
    "name": "ACF Post Object Field",
    "is_list": false,
    "is_required": false,
    "need_internationalization": false,
    "min_list_length": 1,
    "max_list_length": -1,
    "field_type": "json",
    "source_id": null,
    "source_metadata": "{\"is_custom_post_type_field\": true}",  // It is important to identify source_metadata as custom field
    "order_index": 0,
    "help_text": null,
    "editor_metadata": {
      "editorGuid": "<remote_field_editor_guid>",  // You need to get the editor GUID from UI
      "editorConfig": {
        "taxonomy": "post_type:<custom_post_type>",
        "isMultiSelect": null,
        "integrationInstanceId": "<integration_guid>"  // You need to get the editor GUID from UI. Note, This is not the channel GUID
      }
    }
  },
  "base_type": "json",
  "default_values": null
}
```