Returned data preconditions

[simPod]

– The Array of values must be the same length as the Array of keys.
– Each index in the Array of values must correspond to the same index in the Array of keys.

This confused me, can you point me to part of code where I can examine this logic? Thanks!

[mcg-web]

This limitation was introduce in a first place by promise adapters like ReactPromise by example. But this limitation is maybe outdated.

[simPod]

Got it, thanks. Found the actual mapping here https://github.com/overblog/dataloader-php/blob/master/src/DataLoader.php#L366

There is a property key on $data. Can be probably used for value lookup when result is indexed by that key.