Conditional includes possible?

Help
1

I have a file that is created for some of the posts in _includes. If the file exists, I’ve added the file to the post’s metadata. If not, it’ll be empty.

This is my metadata:

---
layout: default
file_exist: filename/""
---

Now, I do not want to include the file if file_exist: is empty. For this I have this:

{% if page.file_exist == empty %}
{% else %}
{% include /folder/{{ page.filename }} %}
{% endif %}

This throws the following error:

Error: Could not locate the included file '/folder/'

My understanding was, since the include liquid is in the else condition it wouldn’t look for the file, which is what I want. It looks like it still looks for the file even though it’s in an if condition.

Could someone help me with this?

I’m on jekyll 4.2.1.

Thank you!

2

The include instruction accepts only the files under your _includes folder, no absolute paths should be accepted.

1 Like
3

Indeed.

So use this

{% include {{ page.filename }} %}

Or

{% relative_include /folder/{{ page.filename }} %}
4

Save yourself an empty block

Use unless which is equivalent to if not

{% unless page.file_exist == empty %}
   {% include /folder/{{ page.filename }} %}
{% endunless %}
1 Like
5

I haven’t done a check for empty like this.

I usually do this, to check that the key is set (even with a value of null or empty string)

{% if page.my_value %}
  {{ page.my_value }}
{% endif %}

And then add a check that string is not empty string.

{% if page.my_value and page.my_value != '' %}
  {{ page.my_value }}
{% endif %}
6

@MichaelCurrin I think you meant include_relative instead…

- {% relative_include /folder/{{ page.filename }} %}
+ {% include_relative /folder/{{ page.filename }} %}
2 Likes
7

Oops thanks for fixing.

1 Like