filter

Filters a list on the value of a property, either on presence or equality.

Testing presence

To filter a list of values:

{% print somelist|filter:`p` %}

Results in a list where all elements have the property p defined and where the property (after conversion to boolean) is true.

This can be used to filter a list of resource ids on the presence of a property. For example, to see all published elements in a list of resource ids:

{% print [1,2,3,4,5,6]|filter:`is_published` %}

To find all pages from page connection hasdocument that have an image:

{% print id.o.hasdocument|filter:`depiction` %}

Testing equality

A second argument can be added to test on equality:

{% print somelist|filter:`title`:"Untitled" %}

Shows all elements whose title property is “Untitled”.

See also

is_visible, is_a, exclude

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