Skip items loop

[rludgero]

Hello everyone,

I'm trying to filter the loop, through the value of the property, but from what I see in nunjucks this option does not exist, or so I think.

As in nunjucks it is not possible to use break or continue in a loop, how i can filter the sequence during iteration, skipping the items?

Is possible to do it, if so, how can I implement it?

Is there a filter?

This is the sample code:

"data": [
    {
        "products_data": [
            {
                "retailer": "Super Offer",
                "description": "Description 1"
            },
            {
                "retailer": "Mega Offer",
                "description": "Description 2"
            },
            {
                "retailer": "Super Offer",
                "description": "Description 3"
            },
            {
                "retailer": "Offer",
                "description": "Description 4"
            }
        ]
    }
]

{% set retailer_title = 'Super Offer' %}

{% for items in data.products_data if items.retailer == retailer_title %}
    <h3>{{ items.retailer }}</h3>
    <p>{{ items.description }}</p>
{% else %}
    There is no offer of {{ retailer_title }} available.
{% endfor %}

Thanks in advance.

[lasithds]

As I understood you want to loop through the loop and print data if a condition is met. If not matches found print another text. It can be done with a proper logic with the available functions.

{% set retailer_title = 'Super Offer' %}
{% set no_matches = true %}
{% for item in data.products_data %}
    {% if item.retailer == retailer_title %}
        {% set no_matches = false %}
        <h3>{{ item.retailer }}</h3>
        <p>{{ item.description }}</p>
   {% endif %}
{% endfor %}
{% if no_matches %}
    There is no offer of {{ retailer_title }} available.
{% endif %}

[fdintino]

@rludgero This is not yet possible with the syntax you provided. The ticket to add loop filtering is #261 and the tracking ticket for nunjucks v4 (which would include this feature) is #1059.

Unfortunately, you'll need to use the workaround @lasithds provided above. I am actively working on adding this feature though.

Closing as a duplicate. I am waiting on feedback to #1059 (comment), if you have any thoughts on it that would be very helpful.

[rludgero]

Hi @lasithds , this is what I wanted 😉 , it has worked great, thank you very much 👏 .