I have a twig template where I would like to test if an item begins with a certain value
{% if item.ContentTypeId == '0x0120' %}
<td><a href='?parentId={{ item.Id }}'>{{ item.BaseName }}</a><br /></td>
{% else %}
<td><a href='?{{ item.UrlPrefix }}'>{{ item.LinkFilename }}</a></td>
{% endif %}
The 0x0120 can look like that or be more complex like this 0x0120D52000D430D2B0D8DD6F4BBB16123680E4F78700654036413B65C740B168E780DA0FB4BX. The only thing I want to do is to ensure that it starts with the 0x0120.
The ideal solution would be to solve this by using regex but I'm not aware if Twig supports this?
Thanks
You can do that directly in Twig now:
{% if 'World' starts with 'F' %}
{% endif %}
"Ends with" is also supported:
{% if 'Hello' ends with 'n' %}
{% endif %}
Other handy keywords also exist:
Complex string comparisons:
{% if phone matches '{^[\\d\\.]+$}' %} {% endif %}
(Note: double backslashes are converted to one backslash by twig)
String contains:
{{ 'cd' in 'abcde' }}
{{ 1 in [1, 2, 3] }}
See more information here: http://twig.sensiolabs.org/doc/templates.html#comparisons
Yes, Twig supports regular expressions in comparisons: http://twig.sensiolabs.org/doc/templates.html#comparisons
In your case it would be:
{% if item.ContentTypeId matches '/^0x0120.*/' %}
...
{% else %}
...
{% endif %}
You can just use the slice filter. Simply do:
{% if item.ContentTypeId[:6] == '0x0120' %}
{% endif %}
You can always make your own filter that performs the necessary comparison.
As per the docs:
When called by Twig, the PHP callable receives the left side of the filter (before the pipe |) as the first argument and the extra arguments passed to the filter (within parentheses ()) as extra arguments.
So here is a modified example.
Creating a filter is as simple as associating a name with a PHP
callable:
// an anonymous function
$filter = new Twig_SimpleFilter('compareBeginning', function ($longString, $startsWith) {
/* do your work here */
});
Then, add the filter to your Twig environment:
$twig = new Twig_Environment($loader);
$twig->addFilter($filter);
And here is how to use it in a template:
{% if item.ContentTypeId | compareBeginning('0x0120') == true %}
{# not sure of the precedence of | and == above, may need parentheses #}
I'm not a PHP guy, so I don't know how PHP does regexes, but the anonymous function above is designed to return true if $longString begins with $startsWith. I'm sure you'll find that trivial to implement.
im reading
Find substring in the string in TWIG
and on a single item it works fine for me.
<!-- language: lang-html -->
<li {% if 'page' in app.request.get('_route')|lower %}class="active"{% endif %}>
<a href="{{path('adminPage')}}">
<i class="fa fa-file-text"></i> <span>{% trans %}pages_text{% endtrans %}</span> <small class="label pull-right bg-{% if nav_options.count_pages > 0 %}primary{% else %}red{% endif %}">{{ nav_options.count_pages }}</small>
</a>
</li>
now I find myself needing it to happen differently.
how would I do to find if "items in this array" are contained in "this substring"
the example would be something like this
{% if ['str1','str2'] in/contained in app.request.get('_route')|lower %}class="active"{% endif %}
I tried this and does not work.
I also would rather avoid using the "or" operator, if its a requirement so be it, but if it can be avoided, the better.
I even went and attempted a split parameter.
{% if 'page,blog'|split(',') in app.request.get('_route')|lower %}active {% endif %}
no dice!
the code is meant to allow me to have "several possible routes" inside a collapsible menu item, and if any of the possible route names (i have several route names, blog, blogAdd, blogEdit, blogPost etc) contains "blog" (same with page, and many others) the "active" class should be printed.
Creating a custom twig function would be an easier solution to use
$function = new Twig_SimpleFunction('array_in_string', function ($haystacks, $needle) {
foreach($haystacks as $haystack) if (stripos($haystack, $needle) !== false) return true;
return false;
});
$twig = new Twig_Environment($loader);
$twig->addFunction($function);
Then you call this function in Twig with :
{% if array_in_string(['page','blog',], app.request.get('_route')) %}
{# do sthing #}
{% endif %}
I don't think you ought to be accessing HTTP stuff - eg get variables - in your view. That's kinda muddying yer MVC a bit.
I'd resolve all that in your controller, and just pass the result to the view (untested, obviously, so treat it as pseudocode):
// controller
$thingIsActive = in_array(strtolower($request->get('_route')), ['str1','str2']);
return $app['twig']->render('whatever.twig', ['thingIsActive' => $thingIsActive]);
{# whatever.twig #}
<li{% if thingIsActive %} class="active"{% endif %}>
I have been stuck at this for a while now. I am new to twig and i am trying to iterate a code untill my variable becomes zero. I have tried this:
{% set total = 5%}
{% set i=1 %}
{% for total %}
{{i}}
{%set i=i+1%}
{% set total = total -1%}
{% endfor %}
and this
{% set i=1 %}
{% for total > 1%}
{{i}}
{%set i=i+1%}
{% set total = total - 1%}
{% endfor %}
but none are working.. What am i doing wrong?
Twig fors are more akin to PHP's foreachs (they are for iterating over a traversable). To achieve what you are describing you would do:
{% set nums = range(1, 5) %}
{% for num in nums|reverse %}
{{ num }}
{% endfor %}
In practice, you could set nums from your controller logic. Also note from the Twig manual:
Unlike in PHP, it's not possible to break or continue in a loop.
You can, however, skip elements with if. Manual example:
{% for user in users if user.active %}
First of all, I know that the logic should be in the controller and not in the view and I keep it that way.
But in this particular situation I need to use preg_match within a ternary operation to set the css class of a div.
Example:
{% for list in lists %}
<div class="{{ (preg_match(list.a, b))>0 ? something : else }}"...>...</div>
{% endfor %}
How can I achieve the (preg_match(list.a,b))>0 condition in twig?
Thanks in advance
For those who came here from Google search results (like me).
There's containment operator that allows you to do something like this:
{{ 'cd' in 'abcde' }} {# returns true #}
You can't use preg_match() directly but there are ways to accomplish it:
if your list is an entity, add a method matches(): {{ (list.matches(b)) ? something : else }}
you could create a custom Twig extension function that uses preg_match() internally http://symfony.com/doc/master/cookbook/templating/twig_extension.html
Expanding from Serge's comment and is the correct answer.
In my example my string is "Message Taken - 12456756". I can then use |split to convert it into an array and use |replace to get ride of white space.
{% set mt = 'Message Taken' in d.note %}
{% if mt == true %}
{#.. you can then do something that is true#}
{% set mt_array = d.note|split('-') %}
{{ mt_array[0] }} | {{ mt_array[1]|replace({' ' : ''}) }}
{% endif %}
This would output my string but I now control two parts instead of 1.
How can I set member of an already existing array from Twig?
I tried doing it next way:
{% set arr['element'] = 'value' %}
but I got the following error:
Unexpected token "punctuation" of value "[" ("end of statement block"
expected) in ...
There is no nice way to do this in Twig. It is, however, possible by using the merge filter:
{% set arr = arr|merge({'element': 'value'}) %}
If element is a variable, surround it with brackets:
{% set arr = arr|merge({(element): 'value'}) %}
I ran into this problem but was trying to create integer indexes instead of associative index like 'element'.
You need to protect your index key with () using the merge filter as well:
{% set arr = arr|merge({ (loop.index0): 'value'}) %}
You can now add custom index key like ('element'~loop.index0)
If initialization only need:
{% set items = { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'unknown' } %}
I have tried #LivaX 's answer but it does not work , merging an array where keys are numeric wont work ( https://github.com/twigphp/Twig/issues/789 ).
That will work only when keys are strings
What I did is recreate another array ( temp) from the initial array (t) and make the keys a string , for example :
{% for key , value in t%}
{% set temp= temp|merge({(key~'_'):value}) %}
{% endfor %}
t keys : 0 , 1 , 2 ..
temp keys : 0_, 1_ , 2_ ....
You can also use the following syntax:
{% set myArray = myArray + myArray2 %}
Just use this like {% set arr={'key':'value'} %} (with no blank space after the :), it works well.
But when I use it inside a for loop, to make it an array, it does not work outside of the for scope.
{% for group in user.groups %}
{% set foo={'loop.index0':'group.id'} %}
{% set title={'loop.index0':'group.title'} %}
{{ title }} //it work
{% else %}
{% set foo={'0':'-1'} %}
{% set title={'0':'未分组'} %}
{% endfor %}
{{ title }} //it does not work, saying title is not defined
{% set links = {} %}
{# Use our array to wrap up our links. #}
{% for item in items %}
{% set links = links|merge({ (loop.index0) : {'url': item.content['#url'].getUri(), 'text': item.content['#title']} }) %}
{% endfor %}
{%
set linkList = {
'title': label,
'links': links
}
%}
{% include '<to twig file>/link-list.twig'%}
Thanks for this thread -- I was also able to create an array with (loop.index0) and send to twig.
I've found this issue very annoying, and my solution is perhaps orthodox and not inline with the Twig philosophy, but I developed the following:
$function = new Twig_Function('set_element', function ($data, $key, $value) {
// Assign value to $data[$key]
if (!is_array($data)) {
return $data;
}
$data[$key] = $value;
return $data;
});
$twig->addFunction($function);
that can be used as follows:
{% set arr = set_element(arr, 'element', 'value') %}
Adding my answer in case anyone needs to update the array when merge doesn't work because it just appends to the end of an array instead of providing the ability to change an existing value.
Let's say you have an array words_array like below:
Object {
0: "First word"
1: "Second word"
2: "Third word"
}
In order to update "Second word", you can do the following:
{% set words_array = {(1): 'New word'} + words_array %}
The resulting array would be:
Object {
0: "First word"
1: "New word"
2: "Third word"
}
You can take it one step further if you are using a loop and use the loop.index0 variable something like the following:
{% for word in words_array %}
{% if word == 'Second word' %}
{% set words_array = {(loop.index0): 'New word'} + words_array %}
{% endif %}
{% endfor %}
You can declare the array as follows
{% set arr = [{'element1': 'value1','element2' : 'value2'},{'element1': 'value1','element2' : 'value2'},{'element1': 'value1','element2' : 'value2'}] %}
I had a multi dimension array. The only solution I could find out is create a new temporary array and update/add the information, which was further passed on to another twig function.
I had this problem sometime ago. Imagine you have an array like this one:
data = {
'user': 'admin',
'password': 'admin1234',
'role': 'admin',
'group': 'root',
'profile': 'admin',
'control': 'all',
'level': 1,
'session': '#DFSFASADASD02',
'pre_oa': 'PRE-OA',
'hepa_oa': 'HEPA-OA',
'pre_ra': 'HEPA-RA',
'hepa_ra': 'HEPA-RA',
'deodor_ra': 'DEODOR-RA'
}
So, you want to show this data in two rows, but remove the password from that list. To this end, split in 2 arrays will be easy with the slice filter. However, we have to remove the password. For that reason, I'm using this snippet. The idea is to put all the elements lesser than the data elements size divided by 2. To calculate this we use the filter length. Now to get the index of the current element we user loop.index. And finally we *push an associative element in the left or right array. An associative array has two components key and value. To reference an array key in twit we operator () and we use the merge filter to push into the array as shown here {% set left_list = left_list|merge({ (key): value }) %}
This is the complete solution.
{% set left_list = {} %}
{% set right_list = {} %}
{% set limit = data|length // 2 %}
{% for key, value in data|cast_to_array %}
{% if key != 'password' %}
{% if loop.index <= limit %}
{% set left_list = left_list|merge({ (key): value }) %}
{% else %}
{% set right_list = right_list|merge({ (key): value }) %}
{% endif %}
{% endif %}
{% endfor %}
{% for key, value in left_list %}
<p>
<label for="{{key}}">{{key}}</label>
<input type="text" name="{{key}}" id="{{key}}" value="{{value}}"
class="text ui-widget-content ui-corner-all">
</p>
{% endfor %}