Fetch a post by front matter

Help
1

Wondering if there is an easy way to fetch a post and its contents from elsewhere in jekyll.

I have been using the following loop to fetch and display contents of a post from another page and it works

{% for post in site.posts %}
{% if post.frontmattervariable == "1" %}
<h2><a href="{{ post.url | prepend: site.baseurl }}">{{ post.title }}</a></h2>  
<p>{{ post.content }}</p>
{% endif %}
{% endfor %}

Question is there a simple way to fetch a post from id or say the front matter variable, am i missing the trick here ?

I need to fetch the content of only one post and how can i do so without having to loop through all

2

In this documentation


It says:
Ā«If you want to include a link to a post on your site, the post_url tag will generate the correct permalink URL for the post you specify.
{% post_url 2010-07-21-name-of-post %} Ā»
Does that help in your case?
Best, Michael

3

Hey @michaelbach
Thanks for coming forward to help

But how can i fetch the contents of that post ?

The tag filter just outputs a string that carries the post url, but I would need the contents of that particular post referenced through the url just something like

set post = post.url
{{ post.content }}

Is it possible to in the first place ?

4

Ah, I misunderstood your question. Out of my depth here. Woud include help?

5

I donā€™t think you can do it as you are basically asking it to loop thru all posts and find this particular one, which is a loop.

Is this just one specific post? or multiple times you want to do something similar? if it is just one then maybe the include is a good idea. Maybe even put the loop in the include and that would only run once maybe? you could pass in the frontmattervariable to the include.

6

Thanks for letting me know, I guess then including the loop as a library and calling via include might be the only option in hand.

Also I am getting to know about collections in jekyll, which may be a close alternative.

7

Set using:

---
featuredpost: my-post-slug
---

Read using this:

{% assign selectedpost = site.posts | where:'slug',page.featuredpost %}
<h2><a href="{{ selectedpost[0].url | prepend: site.baseurl }}">{{ selectedpost[0].title }}</a></h2>  
<p>{{ selectedpost[0].content }}</p>

I am not sure about slug, you might want to try path if it does not work.

If everything fails use:

{% assign selectedpost = site.posts | where_exp:"item","item.url contains page.featuredpost" %}
8

Can you please explain with this example

post 1 - Front matter
model: ā€œ05ā€
warranty: ā€œfive yearsā€

post 2 - Front matter
mode: ā€œ06ā€
warranty: ā€œsix yearsā€

Help me design a constructor that fetchs the post 2 through mode == ā€œ06ā€
And hence print the warranty period of the particular modelā€¦
Preferably through your afore mentioned method.(i.e) using
where_exp:

Thanks in advance

9

Let us assume you have a post with this front matter:

---
mode: '06'
warranty: 'six years'
---

You can access that post and its front matter from anywhere in your Jekyll website by using:

{% assign selectedpost = site.posts | where: 'mode','06' %}
{{ selectedpost[0].warranty }}
10

Almost thereā€¦ Wow

I see that this method works only when i set

| where: ā€œtitleā€, ā€œnameofthepostā€

And it works as expected
But the thing is it works only for variable title: and any other custom front matter variable fails to return output (shows no error though)

Should i be adding something to initialize the front matter variable in config.yml ?

11

You must have made a typo. It is working on my machine with other variables. I have tested it. Did you treat the numbers as strings perhaps?

12

I just tested your example,

---
mode: '06'
warranty: 'six years'
---

unable to fetch warranty from mode.
However the otherway works, that is to say I can fetch mode through warranty from your code ā€¦

Clearly this has something to do with integers and strings mismatch.
Was that you were referring to when you were asking

Did you treat the numbers as strings perhaps

13

Yes indeed. Greatā€¦ so now you know what the problem is. Can you try some extra/better escaping of the numbers? Or can you try to enforce ā€˜stringā€™ treatment by adding a letter in front of the number?