batch

The batch filter «batches» items by returning a list of lists with the given number of items. A second parameter can be provided and used to fill in missing items:

{% set items = ['a', 'b', 'c', 'd'] %}

<table>
    {% for row in items|batch(3, 'No item') %}
        <tr>
            {% for column in row %}
                <td>{{ column }}</td>
            {% endfor %}
        </tr>
    {% endfor %}
</table>

The above example will be rendered as:

<table>
    <tr>
        <td>a</td>
        <td>b</td>
        <td>c</td>
    </tr>
    <tr>
        <td>d</td>
        <td>No item</td>
        <td>No item</td>
    </tr>
</table>

Arguments

• size: The size of the batch; fractional numbers will be rounded up

• fill: Used to fill in missing items

• preserve_keys: Whether to preserve keys or not