I have to set a variable with a macro, that returns a number, so I have this macro:
{% import _self as self %}
{% macro function_size(field) %}
{% import _self as self %}
{# initial Setup #}
{% set field_length = 0 %}
{# Field #}
{% for key, value in field %}
{% if not (key starts with "#") %}
{% set field_length = field_length + 1 %}
{% endif %}
{% endfor %}
{{ field_length }}
{% endmacro %}
The Macro loops through the entries of a field and returns the count of values, that don't start with "#".
So I set a variable with that value:
{% set image_size = self.function_size(content.field_teaser_image) %}
ATTENTION: With this you will set the Variable with Twig Markup. (You can see that when you debug the variable afterwards.)
To get a number/integer as value you have to convert it to a String (that will be interpreted as a number if you calculate with it)
{% set image_size = image_size.__toString %}
With this I set the Variable successfully with a macro.
My Question: Is this a bad practice, are there better ways how to set an Variable?
Thank you!
Two ways to set variables for twig are fine in my opinion.
1. Use theme and other hooks (inside theme or any module) and pass variable from php,
2. create twig extension/filter
Examples:
Filter:
http://leopathu.com/content/create-custom-twig-filter-drupal-8
Extension:
http://symfony.com/doc/current/templating/twig_extension.html
Related
I am trying to print array from the cotroller into the twig temlate. I want to print "-" whenever array is NULL. My problem is that in for-loop case it writes nothing, however single row working fine. Is there some simple way how to do it correctly?
this is not working as i expected
{% for key in keywords|default('-') %}
{{ key~', '}}
{% endfor %}
this is working
{{ key |default('-')}}
You can use an {% else %} construct on a for loop to do something else if the array is null:
{% for key in keywords %}
{{ key~', '}}
{% else %}
-
{% endfor %}
See the documentation here.
The title is a bit ambiguous I know, but let me explain what I'm trying to achieve.
I am attempting to generate a CSV based on data pulled from a doctrine query in my Symfony2 CRM. The data retrieved is based on OpenCart Product and Attribute data, as well as some bespoke information which is irrelevant for this issue.
Each product can have up to 5 different attribute values, named A, B, D, L1 and L2. However, some products do not have all of them, only A, B and L1. The CSV requires each attribute value to be in a separate cell - so the headers are as follows:
ATTRIBUTE: A | ATTRIBUTE: B | ATTRIBUTE: D | ATTRIBUTE: L1 |
ATTRIBUTE: L2
And then I loop through in my Twig file as follows:
{% for attribute in row.product.attributes %}
{% if attribute.text is not null %}
{{ attribute.text }},
{% else %}na,{% endif %}
{% endfor %}
If the product has all 5 attributes, the structure of the CSV is fine. However, if the product only has 3 attributes, it means that all of the subsequent values are pulled back a cell, meaning that the other data is under the wrong headings. I tried checking for values first:
{% for attribute in row.product.attributes %}
{% if attribute.attributeName.name == "A" %}
{% if attribute.text is not null %}
{{ attribute.text }},
{% else %}na,{% endif %}
{% endif %}
{% endfor %}
And I did this for each possible attribute name, but unfortuantely this does not work since if the name does not exist, it just skips it anyway. I'm having trouble trying to think of a way to loop through these attributes and entering a n/a if it's non existent - I'm sure there is a way but I don't know what it is.
For reference, here is the controller code that's generating the data for the CSV:
public function adminCsvAction($filter) {
$repository = $this->getDoctrine()->getRepository('AppBundle:Project');
$stages_repository = $this->getDoctrine()->getRepository('AppBundle:Stage');
$users_repository = $this->getDoctrine()->getRepository('AppBundle:User');
$results = $repository->getSearchResults($filter);
$users = $users_repository->findAll();
$stages = $stages_repository->findBy(array('deleted' => 0), array('sortOrder' => 'ASC'));
$filename = "export_".date("Y_m_d_His").".csv";
$response = $this->render('AppBundle:pages:csv.html.twig', array('data' => $results,'users' => $users, 'stages' => $stages));
$response->headers->set('Content-Type', 'text/csv');
$response->headers->set('Content-Disposition', 'attachment; filename='.$filename);
return $response;
}
The Project Entity has various mappings, one of which links to the Product table in OpenCart which means all attributes and linked values are accessible via this.
Any help in this is much appreciated.
I also agree with Cerad from comment section - that is not the job for Twig. In case your really need to do it, I would try roughly something like this:
{% set allAttr = ["A","B","D","L1","L2"] %}
{% for attribute in allAttr %}
{% if row.product.attributes[attribute] is defined %}
{{ row.product.attributes[attribute].text }}
{% endif %}
{% if not loop.last %},{% endif %}
{% endfor %}
I guess the is defined is critical here...
OK I figured it out. Using what Jovan Perovic suggested, I came up with this:
{% set allAttr = ["A","B","D","L1","L2"] %}
{% set prodAtts = [] %}
{% for row in data %}
{% set existingAtts = [] %}
{% for att in allAttr %}
{% if att not in prodAtts %}
{% set prodAtts = prodAtts|merge([att]) %}
{% endif %}
{% endfor %}
{% for rowAtt in row.product.attributes %}
{% set existingAtts = existingAtts|merge({(rowAtt.attributeName.name|trim):(rowAtt.attributeName.name|trim~'_'~rowAtt.text|trim)}) %}
{% endfor %}
{% for prodAtt in prodAtts %}
{% if prodAtt not in existingAtts|keys %}
{% set existingAtts = existingAtts|merge({(prodAtt):(prodAtt~'_na')}) %}
{% endif %}
{% endfor %}
{% set orderedAtts = existingAtts|sort %}
....
Then the loop for each row thereafter. I used the attribute name with an underscore in order to be able to sort it correct (as it only sorts by value not key) then used preg_replace to remove it along with any instance of the name so I just ended up with the value.
Bit of a lengthy - and probably over thought - solution but it does work!
I'm looking for a way to check in my twig template if the name of the template contains a special word. If that is the case I want to proceed with assigning some stuff. Here is a general idea I have in mind.
{% if [sth like app.request.template_name or sth like that] in `product` %}
// Do some stuff
{% endif % }
Can you guys help me with this?
If you're creating separate template files then you'll know the names and can hardcode the values:
template_1.html.twig:
{% set some_var = 1 %}
{% set another_var = 2 %}
template_2.html.twig:
{% set custom_var = 5 %}
Update:
If you want the template name, you can use:
{% if 'product' in _self.getTemplateName() %}
{# Do stuff #}
{% endif %}
I am implementing an alphabetical search.
We display a table of Names. I want to highlight only those alphabets, which have names that begin with the corresponding alphabet.
I am stumped with a simple problem.
How to read the first character in the string user.name within twig.
I have tried several strategies, including the [0] operation but it throws an exception.
Here is the code
{% for i in ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0-9'] %}
{% set has_user_starting_with_alphabet = false %}
{% for user in pagination %}
{% if user.name[0]|lower == i %}
{% set has_user_starting_with_alphabet = true %}
{% endif %}
{% endfor %}
{% if has_user_starting_with_alphabet %}
<li><span>{{ i }}</span></li>
{% endif %}
{% endfor %}
Is there some function like "starts_with" in twig?
Since twig 1.12.2 you can use first:
{% if user.name|first|lower == i %}
For older version you can use slice:
{% if user.name|slice(0, 1)|lower == i %}
Note: You may also use this notation:
{% if user.name[:1]|lower == i %}
I have a multidimensional array where some objects exist and others don't. I keep getting a
Method "code" for object "stdClass" does not exist in...?
The code I am using in my template is:
{% for item in items %}
<p>{% if item.product.code %}{{ item.product.code }}{% endif %}</p>
{% endfor %}
Some products do not have this code and unfortunately this data structure is provided via a feed, so I cannot change it.
When I looked at the Twig documentation I interpreted that if an object or method was not there it would just return null?
Quickly did a lookup, hope this is works for you :p
defined
defined checks if a variable is defined in the current context. This is very useful if you use the strict_variables option:
{# defined works with variable names #}
{% if foo is defined %}
...
{% endif %}
{# and attributes on variables names #}
{% if foo.bar is defined %}
...
{% endif %}