Add posts with timber twig into an include - wordpress

Question

On a single page, I need to add an include, on the bottom of the page, that add 3 projects.
I have a content type called projects I made with ACF.
single-project.twig
I have a "single-project.twig" page that display the content of a post (which is also a project). At the bottom of this page, I need to add a block like this:
{% block related %}
{% include 'inc-related.twig' %}
{% endblock %}
inc-related.twig
Into "inc-related.twig", I have this:
{% for post in related_posts %}
{% if post.thumbnail %}
<a href="{{post.link}}" class="l-basicgrid-work work">
<article>
<figure>
<img data-src="{{post.get_thumbnail.src('medium_large')|resize(800, 533)}}" alt="{{post.title}}" class="lazy">
</figure>
<figcaption>
<h2>{{ post.title }}</h2>
</figcaption>
</article>
</a>
{% endif %}
{% endfor %}
related.php
I also create a "related.php" page, that integrate the following rendering:
$context = Timber::get_context();
$context['related_posts'] = Timber::get_posts('post_type=project&posts_per_page=3');
Timber::render('inc-related.twig', $context);
Questions
I have 2 questions:
The project are not displaying into the single page. What I have done
wrong?
Can I select 3 project except the one who is displayed on the
single page?
Thank you

Answer 1

you have include twig template but not send data to him. Your related.php is not include automatically. You should write $context['related_posts'] = Timber::get_posts('post_type=project&posts_per_page=3'); in your single-project.twig. And do not use post name in inc-related.twig. May be conflict with current post object.
To single-project.php add $context['related_posts'] = Timber::get_posts('post_type=project&posts_per_page=3');

Answer 2

This is what I did.
single-project.php
I have created a single-project.php page. It contains the following script:
$context = Timber::get_context();
$args = array(
// Get post type project
'post_type' => 'project',
// Get 3 posts
'posts_per_page' => 3,
// Order random
'orderby' => 'rand',
);
$context['related_posts'] = Timber::get_posts( $args );
Timber::render('single-project.twig', $context);
single-project.twig
On my single-project.twig, I have the code that get the result of the php page. Actually, that code is included into an "inc-related.twig" page. And it works!
{% for post in related_posts %}
{% if post.thumbnail %}
<a href="{{post.link}}" class="l-basicgrid-work work">
<article>
<figure>
<img data-src="{{post.get_thumbnail.src('medium_large')|resize(800, 533)}}" alt="{{post.title}}" class="lazy">
</figure>
<figcaption>
<h2>{{ post.title }}</h2>
</figcaption>
</article>
</a>
{% endif %}
{% endfor %}
But on the same page (single-project.twig), I also have data that display content from Advanced Custom Field.
{% if post.project_images %}
{% for item in post.get_field('project_images') %}
<figure class="{{item.project_media_css}}">
<img data-src="{{TimberImage(item.project_media).src}}" alt="{{item.alt_media}}" class="lazy">
</figure>
{% endfor %}
{% endif %}
The problem now is that the ACF field don't return anything.
How should I modify single-project.php to get content from "related_project" and ACF field?

Answer 3

The ACF context is passed to the single page template via Timber $context, using the get_posts function.
single-project.php
$context['related_posts'] = Timber::get_posts('post_type=project&posts_per_page=3');
Twig sends along the active context by default, so this template is fine as-is.
{% block related %}
{% include 'inc-related.twig' %}
{% endblock %}
Finally, the posts in $context['related_posts'] can be looped over. However, within the for loop, refer to each post by anything other than post, such as rel_post. This avoids conflict with the regular post object.
{% for rel_post in related_posts %}
{% if rel_post.thumbnail %}
...
{% endif %}
{% endfor %}