what is ? in pagination hyper links - html

Hi im reading a book about django and in pagination template i see a ? but i do not know why is it there.I searched but got no answer.
Here is the template :
<div class="pagination">
<span class="step-links">
{% if page.has_previous %}
Previous
{% endif %}
<span class="current">
Page {{ page.number }} of {{ page.paginator.num_pages }}.
</span>
{% if page.has_next %}
Next
{% endif %}
</span>
</div>
what is the question mark in the address of page in ???

The ? basically represents a query parameter in the URL.

In many cases, the beginning of the query string is marked with a question mark and the various parameters that make up the query string are separated with an ampersand, but other syntaxes are also possible.
domain.com?parameter1=value1&parameter2=value2&parameter3=value3

Related

How to check if an objects attribute is given?

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 %}

Jekyll: Previous/Next navigation when using custom navigation

The official Jekyll tutorial has an entire section on using a YAML file to define a custom sequence of pages: https://jekyllrb.com/tutorials/navigation/
But it doesn't mention anywhere how one might create previous/next navigation buttons on the pages within that sequence, which is particularly ironic considering that the tutorial itself has them.
I've come up with some Liquid to determine the index of the current page:
{% for item in site.data.encore.docs %}
{% if item.url != page.url %}
{{ item.title }}: {{ forloop.index }}
{% else %}
<strong> This page index: {{ forloop.index }}</strong>
{% assign this_page_index = forloop.index %}
{% break %}
{% endif %}
{% endfor %}
but getting the index of the previous page via {% decrement this_page_index %} always returns -1 for some reason, and something like {% assign previous = this_page_index - 1 %} isn't valid Liquid. Same goes for trying to get the next page with similar methods.
What's the ideal way to accomplish this? I've searched every way I can think of and not found anything.
You can find the code for Jekyll's own navigation on their tutorials page by sifting through their GitHub repo until you get to their section_nav_tutorials.html, but it appears the way to do it is very close to what you have.
Liquid doesn't respect you doing math directly, you have to use a filter. For you, you'd use {% assign previous = this_page_index | minus: 1 %}.

html in django page to limit length of text

I am building a tool in django. It allows myself, and others, to make entries (imagine a journal) for various 'topics'. When the topic is clicked a page opens ('topic' page) that shows the entries. I am trying to limit the length of that text to 200 characters such that if someone wants to see the whole entry, they need to click on that entry to open it up to its specific page.
I have tried putting a maxlength="200" in a few different places. But nothing worked. The only thing I did that kind of worked was to create a 'textarea' with a maxlength="200" but that was visually odd and unappealing. I know there has to be some way to limit the length in the existing code, without creating a new area and putting the entry in there.
Below is the code for the 'topic.html' page. I am thinking that should be enough. If you need the views.py or models.py, let me know.
{% extends "AARs/base.html" %}
{% block header %}
<h2>{{ topic }}</h2>
{% endblock header %}
{% block content %}
<p>
Add new action
</p>
{% for action in actions %}
<div class="panel panel-default">
<div class="panel-heading">
<small>
{{ action.date_added|date:'M d, Y H:i' }}
</small>
<small> Read or Edit Action</small>
</div>
<div class="panel-body">
<small>
<input type="text" name="action" maxlength="10">
{{ action.text|linebreaks }}
</small>
</div>
</div>
{% empty %}
No actions have been added yet.
{% endfor %}
{% endblock content %}
You might be looking for the truncation filters in Django's template language:
truncatechars
truncatechars_html
truncatewords
truncatewords_html
As an example, quoting from the docs:
{{ value|truncatewords:2 }}
If value is "Joel is a slug", the output will be "Joel is …".

Jekyll: code is getting highligheted unwantingly

I've got the following page:
---
layout: default
status: publish
published: true
title: Categories
author:
display_name: lucas
---
{% for category in site.categories %}
<li><a name="{{ category | first }}">{{ category | first }}</a>
<ul>
{% for posts in category %}
{% for post in posts %}
<li>{{ post.title }}</li>
{% endfor %}
{% endfor %}
</ul>
</li>
{% endfor %}
Instead of listing the hrefs per categery, it somehow gets code highlighting:
Can anyone help me out preventing the code getting highlighted? Thanks!
As mentioned by #David Jacquel, .md files are automatically parsed as markdown, in which four space indentations are treated as preformatted code.
I followed his suggestion on my website: change all files to .html. This disabled Markdown parsing in the file. However, if you are unwilling to write in pure HTML and would still like to use Markdown, there is a workaround.
For each element that you would like Markdown to ignore, give it the attribute markdown="0".
For each element that you would like Markdown to parse, give it the attribute markdown="1".
In your case, the following is a possible implementation.
...
<div markdown="0">
{% for category in site.categories %}
<li><a name="{{ category | first }}">{{ category | first }}</a>
<ul>
{% for posts in category %}
{% for post in posts %}
<li>{{ post.title }}</li>
{% endfor %}
{% endfor %}
</ul>
</li>
{% endfor %}
</div>
Is it a .md file ? If yes, try to change for an .html extension.
In markdown four space indentation is used to print code tag.

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