how to check all available variable that have been passed form controller to twig template

问题

how to check all variable exist

Exp in Controller return this to pass to twig template :

return $this->render('index/index.html.twig', [ 'department'=>$departments,'URILink'=>$URILink,'departmentDetail'=>$departmentDetails, 'contentCell'=>$this->mContentCell ]);

then twig template can reuse those variable by doin this

index.html.twig:

</div> {{ include ('department_list.html.twig',{'departments':department,'URILink':URILink}) }}</div>

for Comparison in smarty template we can use this:

get_template_vars() — returns assigned variable value(s)

how to do that with same analogy in twig template? in case i want to make sure all variable have been passed correctly

回答1:

after read this How to retrieve all Variables from a Twig Template?

i found out just simple

{%dump%}

will look all variables passed on a template

回答2:

You can include a template like this per http://symfony.com/doc/current/book/templating.html#including-other-templates

{{ include('YourBundle:ControllerName:yourAction.html.twig', {'variableName': yourData}) }}

Or like this per http://twig.sensiolabs.org/doc/tags/include.html

{% include 'template.html' with {'foo': 'bar'} %}

If you want to check variable use function in dev mod:

{{ dump(yourVariable) }}

回答3:

Instead of verifying that each variable exists when you pass it, it's better practice, imho, to utilize the filter default in this case

<div>
    {{ include ('department_list.html.twig',  'departments':department|default(null),'URILink':URILink|default(null) }}
</div

来源：https://stackoverflow.com/questions/45528452/how-to-check-all-available-variable-that-have-been-passed-form-controller-to-twi