Deeply nesting relation using via does not work

[cebe]

This PR adds a failing test from #7625 by @fernandezekiel and adjusted test data that fails even one of the existing relation tests.

these test failures cover the issue described in #5341

[cebe]

The problem lies in ActiveRelationTrait bucket building among these lines:

yii2/framework/db/ActiveRelationTrait.php

Lines 240 to 251 in 1c20062

	if (isset($viaModels, $viaQuery)) {
	$buckets = $this->buildBuckets($models, $this->link, $viaModels, $viaQuery->link);
	} else {
	$buckets = $this->buildBuckets($models, $this->link);
	}
	$this->indexBy = $indexBy;
	if ($this->indexBy !== null && $this->multiple) {
	$buckets = $this->indexBuckets($buckets, $this->indexBy);
	}
	$link = array_values(isset($viaQuery) ? $viaQuery->link : $this->link);

[cebe]

It is currently not possible. I am planning to try fixing this for 2.0.13

[ztdan4ik]

Hi there!
Thanks for your great work!
Need this fix
Hope soon we will see it :)

[ztdan4ik]

@GlyphDataServices
I've problem exactly with via() and joinWith()

My problem is same like in tests 7ec045b#diff-dca0f800c4dd790fb5d5914365547549R1194

See the screenshots

1. Model relations
2. ModelSearch
3. Result

In this case work fine But this way looks not good.

[ztdan4ik]

@GlyphDataServices
Thanks for your reply
See please my schema

Dummy param not solving the problem. First it's asking for $digit_id, then it's asking for $item_id, then $product_id... And in result I see Trying to get property of non-object in my view because actually relations is not chaining :(

[ztdan4ik]

@GlyphDataServices

Shop
has Product[] Windows 8 and Windows 10
Windows 10 has ProductItem[] Windows 10 (two copies per order) and Windows 10 (one copy per order)
Windows 10 (two copies) has ProductDigit[] №1 (created by manager 1) and №2 (created by manager 2)
№1 has ProductDigitItem[] license code 1, license code 2, license code 3
№2 has ProductDigitItem[] license code 1, license code 2, license code 3

So,

Shops hasMany Product
each Product hasMany ProductItem
each ProductItem hasMany ProductDigit
each ProductItemDigit hasMany ProductDigitItem
each ProductDigitItem hasMany Orders

In back way it's always m2o, like you seen in my schema

I'll try wit aliases and give feedback here later