Not possible to restore atoms created with atomFamily

given the atomFamily:

const testItem = atomFamily<number>({
  key: 'testItem',
  default: null
});

creating an item with set(testItem("myId"), 123) triggers a call to

 useTransactionObservation_UNSTABLE({atomValues, atomInfo, modifiedAtoms} => {
      const list = [];
      for (const modifiedAtom of modifiedAtoms) {
        list.push({name: modifiedAtom, value: JSON.stringify(atomValues.get(modifiedAtom))});
      }
    saveStore(list)
 });

with the key as testItem__"myId". When trying to restore that with

set({key: item.name}, JSON.parse(item.value));

it fails with error Missing definition for RecoilValue: "testItem__"myId""

Also atomValues.get(modifiedAtom) always return nothing as atomValues is always empty.

Also there is an error in the documentation that says we should use modifiedAtom.key. modifiedAtom is a string though and therefore does not have key property.

[drarmstr]

Not yet, we had some pandemic-related delays, but still working on the persistence library.

[drarmstr]

This is why we hesitated a bit to publish the temporary persistence API… Yes, you can keep a map of atoms, though that is tricky with atomFamilies created dynamically. Internally, we actually used setUnvalidatedAtomValues(), which takes a key string. But, that’s going away and requires extra metadata in the atoms. I’m really excited about the new API and helper library in the works.