How to suppress an exception in twig?

Question

symfony

when in the template, when accessing the property, it turns out that it is undefined, an exception is thrown. first I made an error page. but now I want to just ignore in certain cases.
after all, the page as a whole is alive
so that if the exception in the template simply does not show anything, but the template continued to draw
, I can’t find how to do it

Answer 1

{% if foo.bar is defined %}
    ...
{% endif %}

{{ var.foo|default('foo item on var is not defined') }}