> For the complete documentation index, see [llms.txt](https://docs.fortifiedid.se/pipes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fortifiedid.se/pipes/valves/item/item-property-copy.md).

# Item Property Copy

Valve for copying item properties. The operation is performed on one item at a time and does not support copying between items.<br>

Use `item_include_expr` to control which items are processed (see [Item](/pipes/valves/item.md)).

## Configuration

{% hint style="info" %}
**Valve name:**  `ItemPropertyCopy`
{% endhint %}

{% tabs %}
{% tab title="Properties" %}

<table><thead><tr><th width="133">Name</th><th width="282">Description</th><th width="152">Default value</th><th width="128" data-type="checkbox">Mandatory</th><th width="119" data-type="checkbox">Expanded</th></tr></thead><tbody><tr><td><code>src</code></td><td>Property to copy from.</td><td></td><td>true</td><td>true</td></tr><tr><td><code>dest</code></td><td>Property to copy to.</td><td></td><td>false</td><td>true</td></tr><tr><td><code>replace</code></td><td>Replace destination. If true existing value of dest will be replaced with new values (overwritten), otherwise new values will be added.</td><td><code>false</code></td><td>false</td><td>false</td></tr><tr><td><code>filter</code></td><td>Include value predicate. Expression controlling if a value should be copied or not. If not specified, all values are copied. For more information see below.</td><td></td><td>false</td><td>true</td></tr></tbody></table>
{% endtab %}

{% tab title="Example" %}

```json
{
    "name":"ItemPropertyCopy",
    "config":{
        "item_include_expr": "item.id.startsWith('tmp_')",
        "src": "from",
        "dest": "to",
        "replace": false,
        "filter": "value !== ''"
    }
}
```

{% endtab %}
{% endtabs %}

### Include value predicate

Predicate expression that determines whether a value should be copied. The expression is written in JavaScript and must return `true` (to copy the value) or `false` (to skip it).

#### Scopes

The following scopes are available:

<table><thead><tr><th width="145">Name</th><th>Description</th><th>Example</th></tr></thead><tbody><tr><td>value</td><td>The current value</td><td><code>"value.startsWith('__')"</code></td></tr><tr><td>item</td><td>The current item</td><td><code>"item.id === 'tmp'"</code></td></tr><tr><td>session</td><td>The current session</td><td><code>"session.addProp === true"</code></td></tr><tr><td>state</td><td>The current pipe state</td><td><code>"state.itemComplete === false"</code></td></tr><tr><td>request</td><td>The current pipe (NOT HTTP) request. Contains all parameters sent to the pipe.</td><td><code>"request.username != null"</code></td></tr><tr><td>items</td><td>The current set of items</td><td><code>"items.size > 1"</code></td></tr><tr><td>exports</td><td>The current exported (from authenticators or other valves) properties</td><td><code>"!exports.done"</code></td></tr></tbody></table>

{% hint style="info" %}
Since item properties are multi valued, values must be indexed (`item.value[0]`) in expressions or use functions from the mv extension library (`mv.contains(item.value, 'value')`).
{% endhint %}


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