How to call function in twig in Symfony2?

Question

In my model (Task) I have a function:

public function isTaskOverdue()
    {
        if ("now"|date('Y-m-d') > task.deadline|date('Y-m-d')){
            return false;

        } else{
            return true;
        }
    }

In twig (edit) I want to display form:

{% extends 'base.html.twig' %}

{% block title %}app:Resources:Task:edit{% endblock %}

{% block body %}

        {{ form(form) }}

{% endblock %}

I want to display form, if this function return true. How can I call this function in twig?

In php, you can compare 2 dates directly, no need to format them. It twig you need to apply the date filter to get the "now" date. — Alsatian
– Alsatian, Commented Jul 9, 2016 at 13:03

user3743958 · Accepted Answer · 2016-07-09 13:09:33Z

1

Pass the task entity to twig and call method from object task :

{% if task.isTaskOverdue %}
    {{ form(form) }}
{% endif %}

answered Jul 9, 2016 at 13:09

user3743958

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2 Comments

James Over a year ago

I changed my code to look like that, but some error appeared: Variable "task" does not exist in Task/edit.html.twig at line 7

user3743958 Over a year ago

You need to pass object Task from controller. to twig. Here an example: code return $this->render( 'main/main_wrapper.html.twig', ['task' => $task] ); code

Bouquet Lucy · Accepted Answer · 2016-07-09 11:05:34Z

0

I think it should be your controller that receives the function result and display the form or not depending on it.

Also you can write your function like so :

public function isTaskOverdue()
    {
        return ("now"|date('Y-m-d') > task.deadline|date('Y-m-d'));
    }

answered Jul 9, 2016 at 11:05

Bouquet Lucy

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Comments

Alsatian · Accepted Answer · 2016-07-09 13:11:29Z

0

Pass the task entity to twig and do :

{% extends 'base.html.twig' %}

{% block title %}app:Resources:Task:edit{% endblock %}

{% block body %}

    {% if "now"|date("Ymd") <= task.deadline|date("Ymd") %}

        {{ form(form) }}

     {% endif %}

{% endblock %}

But, caution :

If you just not display the form, there is a security issue, because if an attacker submit the form from an self rebuilded HTML page, your controller will receive the form data and apply it.

So I would do the check in the controller, and only create and pass the form to the twig template if the condition is true.

Then, in twig you can use :

{% if form is defined %}
    {{ form(form) }}
{% endif %}

edited Jul 9, 2016 at 13:11

answered Jul 9, 2016 at 13:06

Alsatian

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