Ability to call an imported macro dynamicly

[chasen]

I am attempting to use a variable to call a specific macro name.

I have a macros file that is being imported

{% import 'form-elements.html.twig' as forms %}

Now in that file there are all the form element macros: text, textarea, select, radio etc.

I have an array variable that gets passed in that has an elements in it:

$elements = array(
array(
'type'=>'text,
'value'=>'some value',
'atts'=>null,
),
array(
'type'=>'text,
'value'=>'some other value',
'atts'=>null,
),
);

{{ elements }}

what im trying to do is generate those elements from the macros. they work just fine when called by name:

{{ forms'text' }}

However what i want to do is something like this:

{% for element in elements %}
{{ formselement.type }}
{% endfor %}

This unfortunately throws the following error:

Fatal error: Uncaught exception 'LogicException' with message 'Attribute "value" does not exist for Node "Twig_Node_Expression_GetAttr".' in Twig\Environment.php on line 541

Any help or advice on a solution or a better schema to use would be very helpful.

[fabpot]

This is indeed something that is not supported: calling a macro with a dynamic name (I have added a proper exception to be clearer about the issue).

If you really want to do that, you can do so with the following code:

{{ attribute(forms, element.type, [element.name,element.value,element.atts]) }}

[chasen]

Thanks for your quick reply, and your help in pointing me in the right direction.

[dueddel]

It's not necessary to "hack" your way to dynamically call macros or anything like that. There's a pretty simple workaround described at Stack Overflow.

You basically have to (dynamically) include templates which (statically) call the macros.
See https://stackoverflow.com/a/55970814/3773017 for details.