Because we ended up with such a big error, and it doesn't have an easy
fix, I'm wrapping up today by reverting the entire set of refactors
we've done lately, so modeling in production can continue while we
improve this code further over time.
I generated this commit by hand-picking the refactor-y commits
recently, running `git revert --no-commit <hash>` in reverse order,
then manually updating `pet_spec.rb` to reflect the state of the code:
passing the most important behavioral tests, but no longer passing one
of the kinds of annoyances I *did* fix in the new code.
```shell
git revert --no-commit 48c1a58df9
git revert --no-commit 42e7eabdd8
git revert --no-commit d82c7f817a
git revert --no-commit 5264947608
git revert --no-commit 90407403ba
git revert --no-commit 242b85470d
git revert --no-commit 9eaee4a2d4
git revert --no-commit 52ca41dbff
git revert --no-commit c03e7446e3
git revert --no-commit f81415d327
git revert --no-commit 13ceec8fcc
```
As I'm writing out my solution for this, I'm almost wondering if it's
time for the refactor I've been Theoretically Planning Someday, to move
items to a real `ItemAppearance` model in the database similar to
`PetState`… Hmm hmm hmm…
For now though, I'm taking a break!
This bug never made it into production I think, it was a consequence of
some of how I refactored stuff in the recent changes? I think??
But yeah, I refactor how we manage `SwfAsset#body_id`, to be a bit more
explicit about when and how it can change, instead of the weird
callbacks that tbqh have bit us too often…
Ah right, the callbacks in `ParentSwfAssetRelationship` don't get
called when Rails does automatic join-model management stuff. We need
the `Item` to call its `update_cached_fields` callback itself, too!
When fixing this, I found a new bug that arose, in how we infer
`body_id` for assets that fit all pets. Fixing that next!
This gives better output when they fail, and also avoids spurious
failures like when an array for `cached_compatible_body_ids` is replaced
by an identical one! (I'm running into this right now, and yeah, it
helps a lot lol)
Hmm, I think I made a mistake on `modeling_snapshot.rb:69`: I'm
assigning the *entire* `item.swf_assets` relation to *just* the assets
for the new model of it, which breaks all the other connections.
First, I'm disabling modeling. Then, I'll restore a backup. Then, I'll
write tests for that case, and fix it up!
Not actually touching alt style yet, just the very basic stuff about
how alt style can cause loading to fail in certain extremely rare cases
(specifically, if it's our first time seeing the underlying
color/species combo too, which… isn't gonna happen irl on DTI for a long
time if ever, I would guess, but hey!)
That is, if everything is the same as before, we don't need to change
anything in our database!
I also learned a bit more about RSpec syntax sugars, it's cute!
I forget, there was some tricky debugging about getting the fixtures
right, I think the previous commit doesn't *actually* pass from a clean
setting. Ah well, looks good now!
