Max Age (or TTL) of a type or custom resolver

Users Dgraph
1

Hi all -

Need some help… I have a custom resolver to a REST API that simply creates a signed URL to images in a secured object store. This is working great. However… these signed URL’s have a shelf life. Currently set to 30 minutes, but can be configured however I want.

Is there a way to set a TTL on a type in my graph? Someway to tell the client that if it’s been longer than “XYZ”, refetch from network and not use cache?

2

Hi Tom, Unfortunately there is no way to set a TTL on a type in Dgraph.

3

Could you take a look at this RFC on persisted queries and caching? It might solve your problem or give a way around. There are two related PRs which are close to completion:

  1. feat(Query): Enable persistent queries in dgraph
  2. feat(Query): Add cacheControl directive that adds headers in the response

Cheers

1 Like
4

Thank you!

I’m curious. I’m sure some of you are using apollo client. Two easy solutions out of the box are for me to either use a pollInterval. Which, if I understand the docs properly, it’ll execute a network query again if the time since the query happened has reached the value of the poll interval. OR… I can set the fetchPolicy to “cache-and-network” which does a poll of both the cache and the network and updates only what is different. I’m not 100% sure which would be more “expensive” to performance.

Any thoughts or opinions?