"Bye" and "repeat" loops in Twig

Question

Are there any good ways to use while and repeat loop in Twig? This is such a simple task, but without macros I cannot find anything pleasant and simple.

At least do an infinite loop and then fold it in a state?

EDIT:

I mean something like

do { // loop code } while (condition) 

or

 while (condition) { // loop code } 

Edit 2:

It seems that it is not supported initially by the branch, since it is not supported by any continue; statements continue; nor break; .

https://github.com/twigphp/Twig/issues/654

Answer 1

In a nutshell: no. This functionality implies advanced logic, which should be in your business logic, and not in the template. This is a prime example of separation of concerns in MVC.

Twig fully supports for -loops , which should be enough if you code correctly - these are complex conditional solutions by which the data for display is taken in the business logic where they belong, which then pass the resulting array “ready to render” to the templates. Twig then supports all the nice features that are only needed for rendering.

Answer 2

I managed to implement a simple loop in twig. So the following php statement:

 for ($x = 0; $x <= 10; $x++) { echo "The number is: $x <br>"; } 

when transferring to a branch:

 {% for i in 0..10 %} * {{ i }} {% endfor %} 

This is not a while loop, but a potential workaround. The best suggestion is to leave the business logic this way from the template layer.

Answer 3

You can emulate it with for ... in ... if using the maximum loop limit (10000?)

, but

PHP:

 $precondition = true; while ($precondition) { $precondition = false; } 

Twig:

 {% set precondition = true %} {% for i in 0..10000 if precondition %} {% set precondition = false %} {% endfor %} 

do while

PHP:

 do { $condition = false; } while ($condition) 

Twig:

 {% set condition = true %} {# you still need this to enter the loop#} {% for i in 0..10000 if condition %} {% set condition = false %} {% endfor %} 

Answer 4

It is possible, but a little more complicated.

You can use {% include ... %} to process nested arrays, which from the comments I read are what you need to do.

Consider the following code:

nested_array_display.html

 <ul> {% for key, val in arr %} <li> {{ key }}: {% if val is iterable %} {% include 'nested_array_display.html' %} {% else %} {{ val }} {% endif %} </li> {% endfor %} </ul>