> For the complete documentation index, see [llms.txt](https://docs.fieldsraven.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fieldsraven.app/code-examples/create-a-list.product_reference-metafield.md).

# Create a list.product\_reference metafield

{% hint style="warning" %}
The type of the metafield you're going to create depends on the Raven carrying the message.\
If the value you're sending doesn't match the value type expected, the request will result in an error.
{% endhint %}

{% hint style="info" %}
List metafields enable you to store multiple values in a single metafield. The maximum number of values that can be stored in a metafield list is 128. The value must be provided as a JSON array.
{% endhint %}

<figure><img src="/files/hJ4VDSDtZVGjDkBfdY6Y" alt=""><figcaption></figcaption></figure>

{% tabs %}
{% tab title="Vanilla JS" %}

```html
<!-- JavaScript + Liquid -->
<script type="text/javascript">
  fieldsRavenSubmit = (value) => {
    const ravenObj = {%- render 'raven-mac-gen', resource_id: customer.id, raven_id: 'TBD' -%}
    const valueObj = { value: value };
    const requestParams = { raven: Object.assign({}, ravenObj, valueObj) };
    const response = fetch('/apps/raven/create_metafield', {
      method: 'PUT',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(requestParamsOne)
    })

    response
      .then(res => res.json())
      .then(resJson => console.log('resJson: ', resJson))
  }
</script>

<!-- HTML -->
<button id="fieldsraven-demo" onclick="ravenSubmit('[product_1_id, product_2_id]')">Send the Raven!</button>

```

{% endtab %}

{% tab title="FieldsRaven Fetch wrapper (aka Storefront JS Kit)" %}

```html
<!-- JavaScript + Liquid -->
<script type="text/javascript">
  fieldsRavenSubmit = (value) => {
    const ravenObj = {%- render 'raven-mac-gen', resource_id: customer.id, raven_id: 'TBD' -%}
    const valueObj = { value: value };
    const requestParams = Object.assign({}, ravenObj, valueObj);
    const response = FieldsRaven.send(requestParams);
    response.then(res => {
      if (res.status === 200) {
        console.log('🎉', res.json)
      } else {
        console.error('😞', res)
      }
    })
    .catch(e => console.error(e));
  }
</script>

<!-- HTML -->
<button id="fieldsraven-demo" onclick="ravenSubmit('[product_1_id, product_2_id]')">Send the Raven!</button>

```

{% endtab %}
{% endtabs %}


---

# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.fieldsraven.app/code-examples/create-a-list.product_reference-metafield.md?ask=<question>&goal=<endgoal>
```

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