Currently I'm using this:
{% if locale == 'pt' %}
<html lang="pt-BR">
{% elseif locale == 'en' %}
<html lang="en-US">
{% endif %}
It's decent, but makes the whole <html> tag repeat in the source code. What do you think?
In PHP templates I often use this:
<html lang="<?php
if ($locale === 'pt') {
echo 'pt-BR';
} elseif ($locale === 'en') {
echo 'en-US';
}
?>">
I was wondering if there's a way to produce a similar result with Twig. This is the best I got so far, but it looks a bit odd to me:
<html lang="{%
if locale == 'en'
%}en-US{%
elseif locale == 'pt'
%}pt-BR{%
endif %}"></html>
Is there a neater way to do this?
https://twigfiddle.com/4lwsjb
You could create an array/hash to shorten your code:
{% set localization = {
'pt': 'pt-BR',
'en': 'en-US',
} %}
<html lang="{{ localization[locale]|default('en-US') }}">
demo
I would even suggest to just create the localization array in your controller and pass it to the view or register it as a global variable
The default filter I've just added to provide a fallback if the locale is unknown in the array
Related
Environment: Python 3.6, Flask 1.02, Jinja2
Objective:
Create a dynamic menu in layout.html (which is extended by content.html)
yet the url_for of the dynamic element is frequently requires a parameter to be passed
Issue statement:
How can I pass the parameters for url_for in Jinja template when rendering the template?
I feel like I would need the syntax of str().format in Jinja..
I tried to:
1. pass each part as a separate value:
menus = [{'url': 'func_name', 'menu_title': 'title', 'param': 'param_name', 'param_val': 'param_value'}]
return render_template('content1.html', menus=menus]
in jinja I tried to call it like: (I also tried it without the plus and double-quotes)
{{ url_for(func_name), param_name+ "=" + param_val }}
During rendering it gives error of
url_for() takes 1 positional argument but 2 were given
2. tried to use the {% set var_name: passed_variable %}
Built on 1st version of menus defined on server side, I tried to set the variables within Jinja, but also failed.
menus = [{'url': 'func_name', 'menu_title': 'title', 'param': 'param_name', 'param_val': 'param_value'}]
return render_template('content1.html', menus=menus]
Jinja
{% for menu in menus %}
{% set url = menu.get('url') %}
{% set param = menu.get('param') %}
{% set value = menu.get('param_val') %}
{% url_for(url, param + "=" + value %}
Yet it also didn't work.
It feels like if I give a param for the url_for syntax (not a hard-wired string) I cannot add the parameters.
3. tried to pass whole content of url_for as a string:
menus={'url_string': " 'func_name', param_name=param_value"}
yet it fails again as url_for syntacs put the whole between apostrophes, which I wouldn't need at the end.
Some references I scanned through.
Flask context-processor
It could work if I would create another template of each nav-bar for each content page - yet with that move i could simply move the navbar into the content page. However that seems dull. Stack Overflow topic
Thus question:
How can I pass the
param_id=paramval['id']
for the url_for syntax during rendering
{{ url_for('edit_question', param_id=paramval['id']) }}
The code/structure stg like below:
layout.html
<html>
<body>
{% for menu in menus %}
{% for key, value in menu.items() %}
<a href="{{ url_for(value) }}" >
{{ key }}
</a>
{% endfor %}
{% endfor %}
{% block content %}
{% endblock %}
</body>
</html>
content1.html
{% extends 'layout.html' %}
{% block content %}
content
{% endblock %}
content2.html
{% extends 'layout.html' %}
{% block content %}
content
{% endblock %}
app.py
#app.route('/')
def index():
menus = [{'menu_title1': 'menu_func_name1'}]
return render_template('content1.html', menus=menus)
#app.route('/menu_details/<int:menu_nr>')
def show_details_of_menu(menu_nr):
menus = [{'menu_title3': 'menu_func_name3', 'menu_param_name': 'menu_param_value'}
return render_template('content2.html', menus=menus)
sorry for the Wall of text..
sigh.. after hours I just found how to construct the syntax. I hope it will help others!
During rendering:
menus = [{'url': 'func_name', 'menu_title': 'title', 'parameters': {'param1': param1_value}}]
return render_template('context.html', menus=menus]
In Jinja, I adjusted the syntax to manage cases where no parameters are needed:
{% for menu in menus %}
{% if menu.get('parameters').items()|length > 0 %}
<a href="{{ url_for(menu.get('url'), **menu.get('parameters')) }}">
{{ menu.get('menu_title') }}
</a>
{% else %}
<a href="{{ url_for(menu.get('url')) }}">
{{ menu.get('menu_title') }}
</a>
{% endif %}
{% endfor %}
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'] = $information_id;
And in view file:
{% if information_id == 10 %}
...
{% endif %}
im trying to output an attribute of a product on my product page (opencart v3).
The attribute is called 'technicaldetails' and it works just fine using this code:
{% if attribute_groups %}
{% for attribute_group in attribute_groups %}
{% if attribute_group.name == 'technicaldetails' %}
{% for attribute in attribute_group.attribute %}
{{ attribute.text }}
{% endfor %}
{% endif %}
{% endfor %}
{% endif %}
but the technical details field have unstyled list stored in it.. and this outputs the complete html instead of rendering the list.
ive tried using {{ attribute.text|e }} and {{ attribute.text|raw }} and many other alternatives i could find.. but each time is just throws out the html and not render it..
in php this used to work.
<?php echo html_entity_decode($attribute['text']); ?>
so how can i decode the html now as i cant use php in twig and there is no html_entity_decode in twig either :(
looking forward for somehelp :)
much appreciated
thanks.
Just register the html_entity_decode function in twig.
The most simple way is to look where twig is loaded and add the following code,
$twig->addFilter(new \Twig_Simple_Filter, 'html_entity_decode', 'html_entity_decode');
After that you can just do the following in your twig templates
{{ attribute.text|html_entity_decode }}
UPDATE: For Opencart 3.0.3.7 version filter should be like this:
$twig->addFilter(new \Twig\TwigFilter('html_entity_decode','html_entity_decode'));
Find file
document_root/system/library/template/twig.php
Just after
$this->twig = new \Twig_Environment($loader, $config);
add following code
$twig->addFilter(new \Twig_SimpleFilter('html_entity_decode', 'html_entity_decode'));
After doing this, you must went to admin to reload all modifications in menu Extensions -> modifications.
After that you can do the following in all twig files *.twig
{{ attribute.text|html_entity_decode }}
I have this code:
<?php if ((in_array('name1', (array)$settings)) && (in_array('name2', (array)$settings))) { ?>
As well as this one:
<?php if ((in_array('name1', (array)$this->config->get('settings'))) && (in_array('name2', (array)$this->config->get(settings')))) { ?>
How can this be written in Twig?
Thanks in advance.
In twig you can write
{% if 'needle' in haystack and ... %}
Oh Yeah!
{% endif %}
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.