How to print available form string in twig
In my code php
$data['fruits'] = array('apple', 'banana', 'orange');
$data['help_apple'] = 'This is help apple';
$data['help_banana'] = 'This is help for banana';
$data['help_orange'] = 'This is help for orange';
In twig template
{% for fruit in fruits %}
{{ "help_" ~ fruit }}
{% endfor %}
The print screen is help_apple, help_banana, help_orange
How to print correct data i need for help_ fruit key ?
You need to use the attribute function with _context. Tested on twigfiddle.com. Hope this helps.
{% for fruit in fruits %}
{# Here is how you do it #}
{{ attribute(_context, 'help_'~ fruit) }}
{% endfor %}
The _context variable holds all variables in the current context. Instead of using the attribute function, you can access values of the _context array with the regular bracket notation as well:
{% for fruit in fruits %}
{{ _context['help_' ~ fruit] }}
{% endfor %}
I would personally do it this way as it's more concise and in my opinion clearer.
You might want to check for undefined variables when accessing values of the _context array. I have written about it in my answer to this question: Symfony2 - How to access dynamic variable names in twig.
You also asked whether something like this is possible:
{% set attribute(context, 'help' ~ fruit, "value") %}
That's not possible. If you want to set variables with dynamic names, you need to create a Twig extension. Take a look at my answer to this question: How to set a variable name with dynamic variables?
But, like #user9189147 mentioned, it would be easier and in my opinion clearer if you instead created a new array to hold the help values. Then you wouldn't need to create an extension.
$data['fruits'] = ['apple', 'banana', 'orange'];
$data['help'] = [];
$data['help']['apple'] = 'This is help apple';
$data['help']['banana'] = 'This is help for banana';
$data['help']['orange'] = 'This is help for orange';
{% for fruit in fruits %}
{{ help[fruit] }}
{% endfor %}
Then you can set new values to the help values in Twig using the merge filter, like this (though I don't know why you would want to do it in Twig):
{# Set single value #}
{% set help = help|merge({
banana: 'New help for banana',
}) %}
{# Or multiple values #}
{% set help = help|merge({
apple: 'An apple a day keeps the doctor away',
orange: 'Orange is the new black',
}) %}
Related
I have a twig template where I would like to test if an item begins with a certain value
{% if item.ContentTypeId == '0x0120' %}
<td><a href='?parentId={{ item.Id }}'>{{ item.BaseName }}</a><br /></td>
{% else %}
<td><a href='?{{ item.UrlPrefix }}'>{{ item.LinkFilename }}</a></td>
{% endif %}
The 0x0120 can look like that or be more complex like this 0x0120D52000D430D2B0D8DD6F4BBB16123680E4F78700654036413B65C740B168E780DA0FB4BX. The only thing I want to do is to ensure that it starts with the 0x0120.
The ideal solution would be to solve this by using regex but I'm not aware if Twig supports this?
Thanks
You can do that directly in Twig now:
{% if 'World' starts with 'F' %}
{% endif %}
"Ends with" is also supported:
{% if 'Hello' ends with 'n' %}
{% endif %}
Other handy keywords also exist:
Complex string comparisons:
{% if phone matches '{^[\\d\\.]+$}' %} {% 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.
I have a situation where I need to identify if there is a blank space in a variable in a twig template, and to treat it slightly differently.
Given names in this application are stored with middle initials in the given name field; they are not stored separately.
What I'm trying to achieve is this: Typically most given names are one word, e.g. "John" or "Susan" or something similar. In some of these cases we have cases where the middle initial is stored within this variable (e.g. John J)
Following standard citation standards, we need to be able to list items like this:
{{ surname }}, {{ given_name }}, ed.
This way it would appear like "Smith, John, ed." This is normally fine, however in some situations, where there is a middle initial, it appears as "Smith, John J, ed." - this is incorrect. I can't add a period after the given name, as "Smith, John., ed" would be an incorrect citation standard.
What I'm trying to do is to identify if a given_name contains a space, followed by a single letter, and then format it differently.
Something like this:
{% if given_name [has a blank space preceding a single letter] %}
{{ given_name }}., ed.
{% else %}
{{ given_name }}, ed.
{% endif %}
Is there a way to do this with regex within twig, or is there another method?
Thanks in advance
We can translate your requirement:
has a blank space preceding a single letter
In this little algorithm:
{% set given_name = 'John J' %}
{% set given_name_elems = given_name|split(' ') %}
{% set size = given_name_elems|length %}
{% if size >0 and given_name_elems[size-1]|length == 1%}
{ given_name }}., ed.
{%else%}
{{ given_name }}, ed.
{%endif%}
I suggest you to incapsulate this logic in a function or in a macro.
You could made some try in this working example
This is possible, but is not necessarily going to handle edge cases well. Assuming that you need to do the whole thing in twig, you could do something like this:
{% set nameArray = given_name | split(' ') %}
{% set first_name = nameArray[0] %}
{% set middle_initial = nameArray[1] is defined ? " "~nameArray[1]~"." : ""%}
At this point `middle_initial is now set to either an empty string or the middle initial with the period so you can output the full name like:
{{ surname }}, {{first_name ~ middle_initial}}, ed
You could use a regex with the matches comparison operator and add the dot if given_name matches the pattern.
{{ given_name }}{% if given_name matches '/^.+ .$/' %}.{% endif %}
Sorry, I didn't give you a good answer initially. I've updated my code and my twigfiddle. It's a bit simpler than #Matteo 's:
{% set given_name = 'John J' %}
{% set nameArray = given_name|split(' ') %}
{% if nameArray[1] is defined %}
{{ nameArray[0] }} {{ nameArray[1] }}., ed.
{% else %}
{{ nameArray[0] }}, ed.
{% endif %}
Where {{ nameArray[0] }} specifies the first element of the array. If nameArray1 contains anything, then it is defined.
Here is a working twigfiddle to show you it works.
This is probably relatively easy to do, but I'm new to twig and I'm frustrated.
I'm adapting code from this answer: https://stackoverflow.com/a/24058447
the array is made in PHP through this format:
$link[] = array(
'link' => 'http://example.org',
'title' => 'Link Title',
'display' => 'Text to display',
);
Then through twig, I add html to it, before imploding:
<ul class="conr">
<li><span>{{ lang_common['Topic searches'] }}
{% set info = [] %}
{% for status in status_info %}
{% set info = info|merge(['{{ status[\'display\'] }}']) %}
{% endfor %}
{{ [info]|join(' | ') }}
</ul>
But I'm getting:
Errno [8] Array to string conversion in
F:\localhost\www\twig\include\lib\Twig\Extension\Core.php on line 832
It's fixed when I remove this line, but does not display:
{{ [info]|join(' | ') }}
Any ideas how I can implode this properly?
** update **
Using Twig's dump function it returns nothing. It seems it's not even loading it into the array in the first place. How can I load info into a new array.
info is an array, so you should simple write
{{ info|join(', ') }}
to display your info array.
[info] is a array with one value : the array info.
You shouldn't really be building complex data structures inside of Twig templates. You can achieve the desired result in a more idiomatic and readable way like this:
{% for status in status_info %}
{{ status.display }}
{% if not loop.last %}|{% endif %}
{% endfor %}
You can user json_encode for serialize array as strig, then show pretty - build in twig
{{ array|json_encode(constant('JSON_PRETTY_PRINT')) }}
if need associative array:
{{info|json_encode(constant('JSON_PRETTY_PRINT'))|raw}}
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 %}