how to output all images in an entry's loop

Question

Unfortunately I'm still very new to Craft, but I have a question to which I haven't found an answer here or in the Docs or the ones I found don't seem to work in my case.

I want to output all the images for each entry in this loop and I don't understand how I get the "set image = entry.startbilder" to work that way?

I understand that ".one()" only outputs the first image but how do I change that to output all images? changing that to ".all()" results in an error.

{% for entry in craft.entries.section('projekte').all() %}  
    <a href="{{ entry.url }}">      
        {% set image = entry.startbilder.one() %}
        {% if image %}
            <img src="{{ image.getUrl('medium') }}" alt="{{ image.title }}" />
        {% endif %}
    </a>        
{% endfor %}

thanks in advance for any help!

Answer 1

You should use .all(), but that will give you an array of Assets. You can't call .getUrl() on an array, so you'd have to loop that array:

{% for entry in craft.entries.section('projekte').all() %}  
    <a href="{{ entry.url }}">      
        {% set images = entry.startbilder.all() %}

        {% if images |length %}
            {% for image in images %}
                <img src="{{ image.getUrl('medium') }}" alt="{{ image.title }}" />
            {% endfor %}
        {% endif %}
    </a>        
{% endfor %}

If you'd want to eager load the images, this is how you'd do it:

{% for entry in craft.entries.section('projekte').with(['startbilder']).all() %}  
    <a href="{{ entry.url }}">      
        {% if entry.startbilder |length %}
            {% for image in entry.startbilder %}
                <img src="{{ image.getUrl('medium') }}" alt="{{ image.title }}" />
            {% endfor %}
        {% endif %}
    </a>        
{% endfor %}