How to check if an objects attribute is given? - html

I am trying to make a little website with django when I ran into a problem:
I have a site where I want to look at a post in detail, but not every post has an image attribute - so I am getting an error when I try to display images, since some arent existent.
So the solution would be to check if an image is given, but... How do I do that?
I tried something like this but it did not work:
</div>
<p>{{ object.content }}</p>
{% if object.image.url == True %} <!-- In no case an image is displayed -->
<p>
<img src="{{ object.image.url }}">
</p>
{% endif %}
</div>

You should check the truthiness object.image attribute, not its URL, so:
{% if object.image %}
<p><img src="{{ object.image.url }}"></p>
{% endif %}

Related

How to make category description shown at bottom and not at the top in OpenCart3?

I know that it has to do womething with category.twig which is in /catalog/view/theme/YOURTHEME/template/product/category.twig
I tried to do whatever instructions I found in forums.
I tried this and I tried that
I tried to refresh Cache.
I need more help. What I am doing wrong? Or maybe these instructions that I tried are wrong?
Seems like you are doing everything right. Make sure that in /catalog/view/theme/YOURTHEME/template/product/category.twig YOURTHEME is actually your current theme. From the tutorial for thumb and description take this code
{% if thumb or description %}
<div class="row"> {% if thumb %}
<div class="col-sm-2"><img src="{{ thumb }}" alt="{{ heading_title }}" title="{{ heading_title }}" class="img-thumbnail" /></div>
{% endif %}
{% if description %}
<div class="col-sm-10">{{ description }}</div>
{% endif %}
</div>
<hr>
{% endif %}
Or only for description take
{% if description %}
<div class="col-sm-10">{{ description }}</div>
{% endif %}
And replace it anywhere in this template file (almost everywhere actually).
The most important is to clear twig cache. On howto do that i have described the process in the other article earlier, please read
https://stackoverflow.com/a/61524855/3187127
After that - click Ctrl F5 if you are using Chrome or Firefox (or other combination in your browser which reloads page with cache cleaning) while you are on a category page.

How to add an image to a jinja html page

I'm just learning the basics of django and jinja. I've extended my header file and now I want to add an image to the page, but I don't know the jinja syntax for doing that. Please assist.
{% extends "media/header.html" %}
{% block content %}
This is where I would like to insert my image.
{% endblock %}
Just use html img tag for that. If you pass your image in context as variable;
{% extends "media/header.html" %}
{% block content %}
<img src="{{ variable }}" alt="image alt text" />
{% endblock %}
If you just have static path;
{% extends "media/header.html" %}
{% block content %}
<img src="{{ static('path/to/image.png') }}" alt="image alt text" />
{% endblock %}
May be this is too late to reply, but this is how I use for rendering images using jinja syntax. I have successfully rendered images on pdf from html.
<div class="img-div" style="background-image: url('{{ element.image }}');">
</div>
element.image could be a any resolvable url.

Combining posts with different layouts on one page in jekyll/liquid

I'm trying to create a jekyll page with all of my posts listed sequentially. The problem is that some posts use different layouts, which are then specified in the post frontmatter. I've disabled individual page output for the posts (actually a custom category), so the layouts are partials.
For example, say I have some red posts and green posts:
_posts/01_post1.md:
---
layout: redpost
---
Post 1 (red)
_posts/02_post2.md:
---
layout: greenpost
---
Post 2 (green)
I want these to get processed using the correct layout. I also would prefer to use inheritance, which I think precludes the use of {%include%}.
_layouts/post.html:
<article class="post">
{{ content }}
</article>
_layouts/redpost.html:
---
layout: post
---
<div style="color:red">
{{ content }}
</div>
Then in my top-level page I want to loop over all the posts, render them using the appropriate template, and concatenate the result. Obviously no RENDER filter exists, although perhaps I was just unable to find it's name in the documentation.
_layouts/index.html:
<html>
...
{% for post in site.posts %}
{{ post | RENDER }}
{% endfor %}
</html>
The desired final HTML would then look like:
<html>
<article class="post">
<div style="color:red">
<p>Post 1 (red)</p>
</div>
</article>
<article class="post">
<div style="color:green">
<p>Post 2 (green)</p>
</div>
</article>
</html>
Is this possible without plugins?
The solution was trivial, which is why it isn't mentioned in the documentation. A document object gets rendered with the correct template just by being printed directly:
{% for post in site.posts %}
{{ post }}
{% endfor %}
What is wrong with the following? Seems like a solution to me.
_layouts/index.html:
<html>
...
{% for post in site.posts %}
{% include post.html %}
{% endfor %}
</html>
_includes/post.html:
<article class="post">
{% if post.layout == 'greenpost' %}
{% include greenpost.html %}
{% endif %}
</article>
_includes/greenpost.html:
<div style="color:green">
{{ post.content }}
</div>

How do I display most recent blog post on Octorpess/Jekyll landing page

I created a landing page for my octopress website and I'd like to have the most recent blog post displayed on the home page, but just the most recent blog. I am not sure quite how to proceed. Is there a code like {% include post %} that will allow me to do this?
Thanks.
As per usual, I tend to find the solution after I ask it.
On home page:
<div class="blog-index">
{% assign post = site.posts.first %}
{% assign content = post.content %}
{% include custom/asides/recent_post.html %}
</div>
In separate document saved to custom/asides/recent_post.html:
<h2 class="entry-title">
{% if post.title %}
{{ post.title }}
{% endif %}
</h2>
<div class="entry-content">{{ content | excerpt }}</div>
<a class="btn btn-default" href="{{ root_url }}{{ post.url }}">{{ site.excerpt_link }}</a>
Found solution here: https://gist.github.com/nimbupani/1421828

Using a plugin into the header

Is it possible to use a plugin into the header ?
For example, display one image after the title, in header.html.
<hgroup>
<h1>{{ site.title }}</h1>
{% if site.subtitle %}
<h2>{{ site.subtitle }}</h2>
{% endif %}
{% img /images/my_image.jpg %}
</hgroup>
Note that I didn't try ...
The image isn't really a plugin, but you should be able to add an image. I would use an img tag instead, so <img src="/images/my_image.jpg"> instead, but that may work as well.
You can also use {% include file_path %} If you want to include your own widgets. Please note that file_path is the file path in source/_include/...