Twig - print array without empty values

Question

I have array constructed like this

add_to_context('custom', [
  [
   'title' => 'My title',
   'link' => 'My link'
  ],
  [
    'title' => 'My title 1',
    'link' => 'My link 1'
  ]
]);

and in view I have simple loop

{% for item in custom %}
    <li>
        <h1>{{ item.title }}
        <img src="{{ item.link|e }}" target="_blank">

    </li>
{% endfor %}

And everything works fine. But I want to print elements which have both keys with value. For example, if I have

[
  'title' => '',
  'link' => 'mylink'
]

I don't want to print this. If link will be empty I don't want it too. If both are empty - the same. I want to print it only if both keys have values. So, how can I do this?

Twig can check if a value is empty. See here. All you need after that is a simple if. — Andrei
– Andrei, Commented Mar 8, 2019 at 8:16
So I need to check if my 'item' is empty inside for loop but before printing <li> element, right? — MMPL1
– MMPL1, Commented Mar 8, 2019 at 8:18
Your item will still have content in the example you showed us. It's the 'item.title' you want to check. — Fabian
– Fabian, Commented Mar 8, 2019 at 8:20
Yes, that's correct. Something along the lines of {% if item.title is not empty && item.link is not empty %} .... Ofc if you want more validation you can also check if defined, although it's not really necessary if you're absolutely sure that the values exist. — Andrei
– Andrei, Commented Mar 8, 2019 at 8:22
@DarkBee, Andrei ahhh, my mistake. I have typo error. Now it works like it should. Thanks again — MMPL1
– MMPL1, Commented Mar 8, 2019 at 8:40

Kyrre · Accepted Answer · 2019-03-08 08:39:03Z

6

You could do something like this, maybe.

Twig even has a little built in functionality for this:

<ul>
    {% for item in custom if item.title and item.link %}
        <li>{{ item.title }}</li>
    {% endfor %}
</ul>

I haven't tested it, but I assume the and in the if statement should work.

answered Mar 8, 2019 at 8:39

Kyrre

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1 Comment

reformed Over a year ago

This doesn't work. Twig error: Unexpected token "name" of value "if" ("end of statement block" expected).

Yassine CHABLI · Accepted Answer · 2019-03-08 08:42:21Z

0

You can just add a simple test in your template :

{% for item in custom %}
  {% if item.title|length %}
      <li>
          <h1>{{ item.title}}
          <img src="{{ item.link|e }}" target="_blank">

      </li>
   {% endif %}
{% endfor %}

Generally speaking , "0"|trim expression will evaluates to false.

answered Mar 8, 2019 at 8:42

Yassine CHABLI

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