Problem with nested collections

[Sogl]

Hello!

I'm trying to implement Wordpress style archives in my Grav site.
For example,
Post: https://bestblog.wordpress.com/2007/06/13/elle-effect/
Day: https://bestblog.wordpress.com/2007/06/13/
Month: https://bestblog.wordpress.com/2007/06/
Year: https://bestblog.wordpress.com/2007/

I decided to use nested folders to work with it, but found some problems. First, I'm trying to work with adding year folders.

1_ Problem with pagination.

I use nested loop:

{% set yearCollection = page.collection() %}

<!-- Year loop -->
{% for postYear in yearCollection %}

<!-- Post collection -->
{% set postCollection = postYear.collection() %}

<!-- Post loop -->
{% for post in postCollection %}

....my html output...

{% endfor %}

{% endfor %}

{{ dump(postCollection.params.pagination) }}

{% if config.plugins.pagination.enabled and postCollection.params.pagination %}
    {% include 'partials/pagination.html.twig' with {'base_url':page.url, 'pagination':postCollection.params.pagination} %}
{% endif %}

And my dump is always null, I can get yearCollection pagination parameter only, not postCollection that I need.

Can I get all nested items in one BIG collection and set pagination with it?

2_ Before year directories I used this construction to output events on main page:

process:
    twig: true
    markdown: false
events:
    items:
        '@page': '/events'
    order:
        by: date
        dir: desc
    dateRange:
        start: today

Now with this code I can get only years, but can't get posts directly with '@page': '/events-year', also it doesn't work with '@page': '/2016. Why?

3_ Third problem is copy&pasting the same files for post in every year directory:

Without them I get error 404.

Is it possible to get rid all of these problems?

[Perlkonig]

There are plugins to generate these sorts of archives. Have you looked at how they implement this? I know this doesn't answer your questions directly. I'd just hate for you to waste time if there's a plugin that will get where you want to go.

[Sogl]

@Perlkonig This issue was opened long time ago in grav-plugin-archives repo:
getgrav/grav-plugin-archives#16
I don't know any other type of plugin that can do this job for me...

I did a more deep research and found a way how to solve my 2nd problem.
In YAML:

'@page.descendants': '/events'

In md:

{% set events_collection = page.collection('events').ofType('post') %}

Desc do a recurse through folders and this good filter do a final job 👍

But it did't work for pagination (1st problem) 😞
I found an issue where this problem is discussed:
getgrav/grav-plugin-pagination#18
Will be some movement on this issue?

3rd problem is still open...

[flaviocopes]

postCollection in your example is null because of the scope, as it's defined inside the for but you access it outside of it. Use http://twig.sensiolabs.org/doc/filters/merge.html to populate an array in the iteration.

[Sogl]

@flaviocopes

Use http://twig.sensiolabs.org/doc/filters/merge.html to populate an array in the iteration.

Can I use merge to put collections into each other?

And what about my other questions?

[flaviocopes]

If you define postCollection inside the for, it's not accessible outside it.

If you access /2016 as a page, then it must have a markdown file in it, otherwise you'll get a 404.

[Sogl]

I solved problems with scope and need help with 1st and 3rd problems.

[Sogl]

@rhukster Why this issue was closed without any comment?

[rhukster]

oh sorry, i just read "I solved problems..." and thought you were all sorted. reopening.

[Sogl]

@rhukster Don't worry 😉
I would be very happy if you can help me with 1st and 3rd questions. Please read my comments here:
#1097 (comment)
#1097 (comment)

[Sogl]

Why I can't use only one frontmatter.yaml with template variable in it?

Documentation:
https://learn.getgrav.org/content/headers#template

How it looks:

frontmatter.yaml content:

template: events
content:
    items: @self.children
    order:
        by: date
        dir: desc

Error 404.
Why?

UPDATE

Finally I can reduce number of files with following:

Every events.md contains:

---
content:
    items: @self.descendants
    order:
        by: date
        dir: desc
---

Multilang lines I put into languages.yaml.
And part from events.html.twig:

{% extends 'partials/base.html.twig' %}

{% set level1 = page.title %}
{% set level2 = page.parent.title %}
{% set level3 = page.parent.parent.title %}

{% if level1|length == 2 and level2|length == 2 and level3|length == 4 %}
    {% set myTitle = 'MONTHS_OF_THE_YEAR'|ta(level2|abs - 1) ~ " " ~ level1 ~ ", " ~ level3 %}
    {% set mySubheader = t('HEADER.SUBHEADER_DAY') %}
{% elseif level1|length == 2 and level2|length == 4 %}
    {% set myTitle = 'MONTHS_OF_THE_YEAR'|ta(level1|abs - 1) ~ " " ~ level2 %}
    {% set mySubheader = t('HEADER.SUBHEADER_MONTH') %}
{% elseif level1|length == 4 %}
    {% set myTitle = level1 %}
    {% set mySubheader = t('HEADER.SUBHEADER_YEAR') %}
{% endif %}

{% block title %}{{ myTitle }} — {% endblock %}{% block content %}

{% set places = page.find('/places').header.places %}
{% set collection = page.collection().ofType('post') %}

...

<h1 class="brand-heading">{{ myTitle }}</h1>
<p class="intro-text">{{ mySubheader }}</p>
...

@rhukster Can you add an option to use the same template in nested folders? This option removes the creation of files in each folder.
For example:

---
template: my-template
template_nested: events
---

[rhukster]

Closing to due to inactivity

[Sogl]

@rhukster Because no answers from developers