Apollo-client: Document client.writeData

[lorensr]

It doesn't appear here:

https://github.com/apollographql/apollo-client/blob/master/docs/source/api/apollo-client.md
https://www.apollographql.com/docs/react/api/apollo-client.html

[Orozco93]

Can you provide more information on what the issue is?

[Orozco93]

If the case is how to use client.writeData.

<apolloConsumer>
{client => client.writeData({ _object in store you want to modified_ })}
</apolloConsumer>

For more information here is the link of the documentation.
This feature is from react-apollo: react-apollo

[jack-sf]

The issue is that writeData is mentioned in the client and cache API, is available for public use, but there are little docs on how to use it.

Also there's a few quirks about it, you can't just do client.writeData({ _object in store you want to modified_ }), because of https://github.com/apollographql/apollo-link-state/issues/242#issuecomment-488066433 , https://github.com/apollographql/apollo-client/issues/4785#issuecomment-493061107 , https://github.com/apollographql/apollo-client/issues/4554 .

Also there's this id param that probably should be constructed with client.cache['config'].dataIdFromObject (another quirk here: config is currently private property, thus it's difficult to reach dataIdFromObject) .

[sangdth]

I've followed the documentation and it just simply does not work. The cache is empty. It took me 3 days and I still can not make the local state works.

[lorensr]

This function is gone as of 3.0.0:

https://github.com/apollographql/apollo-client/blob/main/CHANGELOG.md#apollo-client-300