String versions of date scalars

[jlowcs]

Is your feature request related to a problem? Please describe.

As the available data scalars implementations serialize dates to Date objects, when using Apollo we end up with a difference of behavior between server-side and client-side, the former serializing to Date objects, while the latter leaves them as ISO strings.

Even without that inconsistency, it makes the migration from non-maintained graphql-iso-date difficult because of the change in types.

Describe the solution you'd like

Providing Date scalars that serialize to an ISO string would be a big help. For instance, adding a GraphQLDateTimeIsoString and a GraphQLDateIsoString.

Describe alternatives you've considered

Alternatives are either:

• keep using graphql-iso-date with the risk of it not working with future graphql version, and having to use npm install --force because of peer dependencies
• copy/pasting the code from graphql-iso-date in our app
• forking graphql-iso-date and updating the peer deps
• finding a solution to handle scalars client-side, and update our codebase to expect Date objects instead of strings

None of those are great :/

[josiah-roberts]

+1, would really benefit from this.

[falkenhawk]

#1641

[ardatan]

LocalDateTime scalar is available now!