SOLVED: Liquid Exception: undefined method `split' for nil:NilClass in /_layouts/post.html

Help
1

My public repository: GitHub - verity-s/verity-s.github.io: Enables / disables WiFi networks on T-Mobile home internet Arcadyan KVD21 gateway

Build fails with this error, and I have no idea what is going on. The post.html contents:

---
layout: base
---

<section>
  <br />
  {{ content }}  
  <h1>
    Latest posts
  </h1>
  <ul>
    {% for post in site.posts %}
      <h2><a href="{{ post.url }}">{{ post.title | escape }}</a>
      </h2>
      <h6>
      <span>
        {{ post.date | date_to_string }} &bull;
        {% assign words = post.content | number_of_words %}
        {% if words < 360 %}
          1 min read
        {% else %}
          {{ words | divided_by:180 }} min read
        {% endif %}
      </span>
      </h6>
      {{ post.excerpt }}
    {% endfor %}
  </ul>
</section>

I further edited the post.html to try and change the post date format to YYYY-MM-DD, adding to _config.yml:
date_format: "%Y-%m-%d"
And then I hope to have in post.html:
{{ post.date | date: site.date_format | date_to_string }} &bull;
But no, same exact Liquid error. Any guidance is appreciated!

2

It feels like it took me forever to have a lightbulb moment about this. To any other beginner in the future: inside a post.html, the post date is page.date (and similarly, it’s page.content and so on) but inside my default.html list of posts and their dates are post.date (and correspondingly post.content). I was missing that distinction and the build was not finding the correct values. Pfew.

Still not sure what the logic is of this difference.

3

when you loop over things you can use any word/string as the item descriptor (not sure what this is actually called - iterator maybe) so in your code above it says for post in.. the post can be whatever you want, normally people use a word that descibes what the thing is (a post) - I usually use item - like for item in site.posts and then it is item.title or whatever.

When you you are on a page and not in a loop then you use page - like page.title.

I had the same issue originally thinking post.whatever was a thing when it isn’t - unless you are inside a loop and it said for post in.....

4

Thank you, that is very helpful!