Is there a difference between the notation not something is defined vs something is not defined. To me it looks like the same behavior but maybe I miss something here.
No, the compiled result is the same. Guess it's just a preference
Snippet
{% if not something is defined %}
{% endif %}
-----------------------------------------
{% if something is not defined %}
{% endif %}
Compiled result
protected function doDisplay(array $context, array $blocks = [])
{
$macros = $this->macros;
// line 1
if ( !array_key_exists("something", $context)) {
// line 2
echo "
";
}
// line 4
echo "
-----------------------------------------
";
// line 7
if ( !array_key_exists("something", $context)) {
// line 8
echo "
";
}
}
demo
Related
I have the following variables in twig:( I can see them with kint)
data.po_user_setting.us_highlight_color1 = '#008080'
data.po_user_setting.us_highlight_color2 = '#00FFFF'
data.po_user_setting.us_highlight_color3 = '#FFFF00'
data.po_user_setting.us_highlight_color4 = '#FF0000'
data.po_user_setting.us_highlight_color5 = '#FF00FF'
and
verse.po_verse_highlight.hl_rating = Returns [1-5]
How can I show the dynamic variable like this? Neither of these lines work:
{{_context['data.po_user_setting.us_highlight_color' ~ verse.po_verse_highlight.hl_rating]}}
{{attribute(_context, 'data.po_user_setting.us_highlight_color' ~ verse.po_verse_highlight.hl_rating)}}
The problem you are facing is the variable you want to access is actually an array.
With your current code, twig is looking for a variable called e.g., data.po_user_setting.us_highlight_color.foo, translated to $_context['data.po_user_setting.us_highlight_color.foo']
To actually access the variable you want, you would need to treat the variable like an array:
{{ {{ _context['data']['po_user_setting']['us_highlight_color'~ verse.po_verse_highlight.hl_rating] }} }}
This is quite long to type every time, so to reduce the typing you could use a macro or extend twig
macro
{% macro get_array_value(context, key) %}
{% set value = null %}
{% for key in key|split('.') %}
{% set value = loop.first ? context[key]|default : value[key]|default %}
{% endfor %}
{{ value }}
{% endmacro %}
As macro's don't have access to the special variable _context you would to pass this every time when you want to call the macro, e.g.
{% import _self as macros %}
{{ macros.get_array_value(_context, 'data.po_user_setting.us_highlight_color' ~ verse.po_verse_highlight.hl_rating) }}
extending twig
<?php
$twig->addFunction(new \Twig\TwigFunction('get_array_value', function ($context, $variable) {
$keys = explode('.', $variable);
if (empty($keys)) return;
$value = $context[array_shift($keys)] ?? [];
foreach($keys as $key) {
$value = $value[$key] ?? [];
}
return !empty($value) ? $value : null;
}, ['needs_context' => true,]));
Then you can call this function like the following in twig
{{ get_array_value('data.po_user_setting.us_highlight_color' ~ verse.po_verse_highlight.hl_rating) }}
can you see whats wrong with this :
{% if 'information_id=10' in url %}
Im trying to use an if statement when the url contains that string, but its not working, have i done something wrong?
Many thanks!
If you want to do something in a special information page, edit catalog\controller\information\information.php, find:
if ($information_info) {
Add after it:
if ($information_id == 10) {
$data['target_page'] = true;
} else {
$data['target_page'] = false;
}
Now in catalog\view\theme\your-theme\template\information\information.twig file, use it:
{% if target_page %}
This is target page.
{% endif %}
You may need to refresh modifications and clear theme cache.
Edit:
or you can pass $information_id from controller:
$data['information_id'] = $information_id;
And in view file:
{% if information_id == 10 %}
...
{% endif %}
I have modified my Twig Template Engine to use different brackets.
From:
{% if a < b %}
{% endif %}
To:
{ if a < b }
{ endif }
How do I change PHPStorm to recognize this syntax and auto complete?
I've already a solution, but just for JavaScript. Unfortunately while-loops do not exist in Twig.
My Twig-target in JavaScript:
var x = 10; // this is an unknown number
var result = x;
while (100 % result !== 0) {
result++;
}
console.log(result);
Any ideas how I do this in Twig?
What's my target: (not important if you already understood)
I want to get the first number after my unknown number, that satisfy the following condition:
100 divided by (the first number) equals a whole number as result.
EDIT: I have no access to PHP nor Twig-core.
You can make a Twig extension like:
namespace Acme\DemoBundle\Twig\Extension;
class NumberExtension extends \Twig_Extension
{
public function nextNumber($x)
{
$result = $x;
while (100 % $result !== 0) {
$result++;
}
return $result;
}
public function getFunctions()
{
return array(
'nextNumber' => new \Twig_Function_Method($this, 'nextNumber'),
);
}
/**
* Returns the name of the extension.
*
* #return string The extension name
*/
public function getName()
{
return 'demo_number';
}
}
And define it in the service.xml of the bundle:
<service id="twig.extension.acme.demo" class="Acme\DemoBundle\Twig\Extension\NumberExtension" >
<tag name="twig.extension" />
</service>
Then use it in the template:
{{ nextNumber(10) }}
UPDATE
A (not so great) approach but that possibly satisfy your needed is to do something like this:
{% set number = 10 %}
{% set max = number+10000 %} {# if you can define a limit #}
{% set result = -1 %}
{% for i in number..max %}
{% if 100 % i == 0 and result < 0 %} {# the exit condition #}
{% set result = i %}
{% endif %}
{% endfor %}
<h1>{{ result }}</h1>
Hope this help
In my case - I had to output an object with similar subobjects - including a templete with predefined values and setting up a normal if-condition worked.
See http://twig.sensiolabs.org/doc/tags/include.html for more infomration.
Is it possible to check if given variable is string in Twig ?
Expected solution:
messages.en.yml:
hello:
stranger: Hello stranger !
known: Hello %name% !
Twig template:
{% set title='hello.stranger' %}
{% set title=['hello.known',{'%name%' : 'hsz'}] %}
{% if title is string %}
{{ title|trans }}
{% else %}
{{ title[0]|trans(title[1]) }}
{% endif %}
Is it possible to do it this way ? Or maybe you have better solution ?
Can be done with the test iterable, added in twig1.7, as Wouter J stated in the comment :
{# evaluates to true if the users variable is iterable #}
{% if users is iterable %}
{% for user in users %}
Hello {{ user }}!
{% endfor %}
{% else %}
{# users is probably a string #}
Hello {{ users }}!
{% endif %}
Reference : iterable
Ok, I did it with:
{% if title[0] is not defined %}
{{ title|trans }}
{% else %}
{{ title[0]|trans(title[1]) }}
{% endif %}
Ugly, but works.
I found iterable to not be good enough since other objects can also be iterable, and are clearly different than an array.
Therefore adding a new Twig_SimpleTest to check if an item is_array is much more explicit. You can add this to your app configuration / after twig is bootstrapped.
$isArray= new Twig_SimpleTest('array', function ($value) {
return is_array($value);
});
$twig->addTest($isArray);
Usage becomes very clean:
{% if value is array %}
<!-- handle array -->
{% else %}
<!-- handle non-array -->
{% endif % }
There is no way to check it correctly using code from the box.
It's better to create custom TwigExtension and add custom check (or use code from OptionResolver).
So, as the result, for Twig 3, it will be smth like this
class CoreExtension extends AbstractExtension
{
public function getTests(): array
{
return [
new TwigTest('instanceof', [$this, 'instanceof']),
];
}
public function instanceof($value, string $type): bool
{
return ('null' === $type && null === $value)
|| (\function_exists($func = 'is_'.$type) && $func($value))
|| $value instanceof $type;
}
}
Assuming you know for a fact that a value is always either a string or an array:
{% if value is iterable and value is not string %}
...
{% else %}
...
{% endif %}
This worked good enough for me in a project I was working on. I realize you may need another solution.