I'm using Shopify Liquid.
If I don't include {% if my_array %} and have a code such as this:
{% for var in my_array %}
Do this heavy task
{% endif %}
does it skip the "heavy task" if my_array is empty or is it better to include the if statement (performance wise)?
Thank you.
Thank you for your answers, but I found this from Shopify developers documents.
According to Shopify, {% for var in my_array %} also acts like an if statement, which can be combined with {% else %} for when the array is empty. for example:
{% for var in my_array %}
Do this heavy task
{% else %}
<p>This array is empty</p>
{% endfor %}
Hope this helps others searching for it too.
Since you're writing it in liquid, you won't see any performance issues since the result will already be written when the page loads.
If you only need to check whether it is empty or not
{% if my_array !== blank %}
Do this heavy task
{% else %}
<p>This array is empty</p>
{% endif %}
Related
{% for item in site.data.{{page.ocean}}.section %}
This is not working for me. I'm using page.ocean at other places in the page and it works fine. I'm not sure if I can do this within a for statement. If not, is there a way to work around it?
Try this:
{% assign ocean = page.ocean %}
{% for item in site.data[ocean].section %}
<!-- your code -->
{% endfor %}
Check Liquid's Variable and yes we can access data variable content like an Array through indexing.
Essentially I want to go ahead and while the for loop is going to get the images and information of all products to be displayed. insert a conditional if statement in order to see if the products tags contain the tag 'lewd' then it's blurred (right now it's set to just not display the image though)
I'm having issues finding the best place to implement it, I know it should be done on the product templates page (I think) because it seems to be pulling the images and information in the loop, but no matter where I insert the code to try to pull the info and apply the effect it doesn't work. I've gone through many many different ways to do it and this is only the latest example.
<div class="grid product-single{% if section.settings.enable_payment_button %} product-single--{{
section.settings.image_size }}-image{% endif %}">
<div class="grid__item product-single__photos {{ product_image_width }}{% if
section.settings.image_size == 'full' %} product-single__photos--full{% endif %}">
{%- assign featured_image = product.selected_or_first_available_variant.featured_image | default:
product.featured_image -%}
{% for image in product.images %}
{% capture img_id %}FeaturedImage-{{ section.id }}-{{ image.id }}{% endcapture %}
{% capture img_class %}product-featured-img{% endcapture %}
{% capture zoom_img_id %}FeaturedImageZoom-{{ section.id }}-{{ image.id }}{% endcapture %}
{% capture img_wrapper_id %}{{ zoom_img_id }}-wrapper{% endcapture %}
{%- assign img_url = image | img_url: '1x1' | replace: '_1x1.', '_{width}x.' -%}
{% include 'image-style' with small_style: true, width: height, height: height, wrapper_id:
img_wrapper_id, img_id: img_id %}
<div id="{{ img_wrapper_id }}" class="product-single__photo-wrapper js">
Before the loop closes I want to go ahead and search for those tags so my code was
{% if product.tags contains "Lewd" or product.tags contains "lewd" %} blur {% endif %}
I'm not sure if Shopify already passes this info along though? in that case I suppose i would need to run another forloop? Such as
{% for tag in product.tags %}
{% if tag contains "lewd" %}
but not sure where i would even do that. I'm a novice at working with shopify. thanks for any help
The contains keyword behaves slightly differently depending on what you're using it on:
If the left-hand-side variable is a text string, contains will return true if the right-hand-side value is found as a substring of the left-hand-side value.
If the left-hand-side variable is an array, contains will return true if one of the array values exactly matches the value supplied on the right-hand-side. Type matters, too - a number won't match a string, a string won't match an object, etc.
product.tags gives you an array of strings, so as long as the product has a tag that is exactly lewd then your intuition is correct: {% if product.tags contains 'lewd' %} will be true. However, if your product is tagged with something like lewd-because-reason instead (and doesn't have a plain 'lewd' tag), lewd-because-reason is not an exact match to lewd, so the check above would be false.
Looking at the code you've supplied, a good place to put this check could be inside the {% capture img_class %} line, as then you should be able to add another class to the image being rendered.
Hope this helps!
I'm building a jekyll site. I have a loop setup -
{% for article in site.posts limit:5 %}
{% if article.tag == "infographic" %}
<a class="infographic tag" href="/tags/infographics.html">{{ article.tag }}</a>
{% endif %}
{% endfor %}
This loop spits out the latest 5 posts in my infographic tag. I would like the loop to produce only the third latest post. Any ideas on making this happen?
The solution is really difficult for tags. If you use infographic as a category, it could be really simple:
for article in site.categories.infographic | offset: 2 | limit: 1
I am new to Twig and AngularJS. So, please be easy on me. Here is the case, I read it somewhere that if statement in Twig only works outside verbatim tag. So, that's why I endverbatim right before the if statement block. However, I need to turn verbatim on again to get that "something" value inside the if statement. So the logic is kinda like this:
{% verbatim %}
some code here...
{% endverbatim %}
{% if (turn on verbatim) something (turn off verbatim) == false %} ... {% endif %}
{% verbatim %}
{% endverbatim %}
Is it possible? or is there any other approach for this problem? thank you
Did you try putting the {% endif %} after the {% endverbatim %}. I'm no expert on either, but that sounds like it should work to me.
Like so:
{% if something == false %}
{% verbatim %}
...
{% endverbatim %}
{% endif %}
There is no such syntax like turn on or off verbatim. But you can start and end your raw code block with {% verbatim %} and {% endverbatim %} any time. Like for your example code should be like follow if you just need to echo your value of the something variable:
{% verbatim %}
some code here...
{% if ( {% endverbatim %} {{ something }}{% verbatim %}) == false %} .... {% endif %}
{% endverbatim %}
{% endverbatim %}
This will output
some code here...
{% if ( value of your something ) == false %} .. {% endif %}
Update
If you are using AngularJs template, I am not sure about your {% if (turn on verbatim) something (turn off verbatim) == false %} ... {% endif %} part. I could not find such syntax in angularJs docs. if you problem is relate to using angularJs within twig, I'll suggest you read this. If you are interested to play with twig you can find something here. And here is the docs for AngularJs ngif directive
Happy coding!
I have a simple loop which requires me to concatenate my loop counter variable loop.index within my main value variable (hope that makes sense) but I can't get it working.
Is it even possible? See below...
{% for article in section.articles %}
{{ article.internationalText~{{loop.index}} |raw|nl2br }}
{% endfor %}
You can use twigs attribute function which was added in version 1.2. It is designed for accessing a "dynamic" attribute of a variable.
{% for article in section.articles %}
{{ attribute(article, 'internationalText' ~ loop.index) |raw|nl2br }}
{% endfor %}
Note, benatespina's answer did not work for me.
Have you tried this?
{% for article in section.articles %}
{{ article.internationalText~loop.index |raw|nl2br }}
{% endfor %}
This should work.