How to access a property in twig that begins with a hash

Question

I'm trying to get to the name of a media file in twig. The name is located at:

mediaitem[0]->#values[name][x-default]

in the rendered entity passed into the template with field_media_item|field_value.

Answer 1

You can access hash properties in Twig {{ foo['#bar'] }}, but not the internal (protected) '#values table of an entity. Look in the media entity for public methods starting with get.

In this case getName():

{{ media.getname }}

The question doesn't provide information about the context, but if it is for example a node then you can access media items like this:

{% for field_media_item in node.field_media %}
    {{ field_media_item.entity.getname }}
{% endfor %}

It's recommended to use a get method if the entity provides one, because they often contain extra logic. If you don't find a get method then access the field value directly:

{{ field_media_item.entity.name.value }}