Stale cached value returned where(...)->first()

[aaroncameron]

Describe the bug
Requesting the first (and unique) result with Model::where(...)->first() returns an old, incorrect result,

Eloquent Query

MyModel::where(['a'=>1,'b'=>2])->first();  // returns an old result

MyModel::where(['a'=>1,'b'=>2])->get()->first(); // returns the correct result.

Environment

• PHP: 8.1.2
• OS: Ubuntu 22.04
• Laravel: 10.15.0
• Model Caching: 0.13.4

Additional context
That the result in my test case is unique may or may not be relevant. Have not constructed a test where it is not to confirm.

There is in the above a unique key across a,b. The result is not simply coincidentally unique, but is by definition.

[aaroncameron]

Just to update with another case discovered, for non-unique result sets, different symptom and way to trigger:

MyModel::where('cond', true)->first(); // returns no results
MyModel::where('cond', true)->get()->first(); // returns the correct result
MyModel::where('cond', true)->limit(1)->get()->first(); // also returns no results.

[mikebronner]

thanks for the added details Aaron. These should not be happening. I will take a look at the tests later today and see what's going on.

[mikebronner]

I've been doing some testing and have found the following:

• queries using the ->where([ <multiple conditions> ]) syntax are not caching correctly, when compared to ->where(...)->where(...)

•         $author = (new Author)
            ->where("id", 1)
            ->orWhere("id", 2)
            ->first();
        $author2 = (new Author)
            ->where("id", 2)
            ->orWhere("id", 1)
            ->get()
            ->first();
  

  seems to return the same results as expected.

Could you send me the full query you are having issues with? Perhaps that will give me some additional clues to look for.

[aaroncameron]

Sure thing. I don't recall the code that was the source of my original case any longer, but the example I sent here was contrived anyway. Confirmed, but contrived. The version of the issue I found earlier today I still have though. TL;DR is it looks like the limit causes the cache to fail in some way.

Looks to me like the conditions don't even matter (other than the issue you found).

In all cases I confirmed the working/not working with the cache turned on, then turned the cache off with the query logging on to get the exact query generated.

Working:

DND5ECharacterSheet::where('is_premade', true)->get()->first();

select * from `dnd5e_character_sheets` where `is_premade` = ?
-- {"bindings":[true],"time":14.59} 

Not working:

DND5ECharacterSheet::where('is_premade', true)->limit(1)->get()->first();

select * from `dnd5e_character_sheets` where `is_premade` = ? limit 1
-- {"bindings":[true],"time":9.35} 

Not working:

DND5ECharacterSheet::where('is_premade', true)->first();

select * from `dnd5e_character_sheets` where `is_premade` = ? limit 1
-- {"bindings":[true],"time":6.52}