network-only fetchPolicy delivers empty data when loading

[kliakos]

The behavior changed after 3.1.0 release.

Previously, when data was defined, it was guaranteed that a complete result was included in the object. This was I only had to check if data was defined. Now, with fetchPolicy network-only, after the initial search and while the second search is in-flight, I am getting an empty object from data.

Possibly has to do with #6710

[stoically]

Hitting this issue as well, while trying to get a minimal reproduction case it seems that only the combination of

      notifyOnNetworkStatusChange: true,
      fetchPolicy: "network-only",

is affected.

Minimal repo: https://github.com/stoically/apollo-empty-data-object
Simple, probably hackish, fix: stoically@e6088e5

[kliakos]

fetchPolicy: 'no-cache' also has the same issue.

[longzheng]

Just bumping this issue because this issue leads some Cannot read property 'success' of undefined exceptions when using optional chaining data?..

[ShannonLCapper]

FWIW, I'm not seeing this crash anymore on the latest @apollo/client version 3.4.16 (but could easily reproduce it via the combo of fetchPolicy: 'network-only' + notifyOnNetworkStatusChange: true on version 3.3.14)