Fetch result from mutations offline

[Olega95]

Hello. I may not have quite a trivial task, but there is no solution to it, due to the fact that you do not have its implementation. Tell me, could you add the following function to the client: when a mutation is made, when the Internet is turned off (I use a self-written Link on offline mutation), in response to a mutation I get data: null. In order to update the cache manually, I need to get the data. Therefore, I have a question, is it possible to add to the client the ability to display mutated data in the update handler in the result when the Internet is turned off? That would be very cool! Thank you!

[vincenzopalazzo]

Maybe some caching policy can help you in this case?

graphql-flutter/packages/graphql/lib/src/core/policies.dart

Lines 22 to 37 in fa35fd7

	enum FetchPolicy {
	/// Return result from cache. Only fetch from network if cached result is not available.
	cacheFirst,
	/// Return result from cache first (if it exists), then return network result once it's available.
	cacheAndNetwork,
	/// Return result from cache if available, fail otherwise.
	cacheOnly,
	/// Return result from network, fail if network call doesn't succeed, don't save to cache.
	noCache,
	/// Return result from network, fail if network call doesn't succeed, save to cache.
	networkOnly,
	}

Yes off curse, this type of policy don't have any different between connection on/connection off

But is somethings that we can start to discuss a little bit

[Olega95]

Yes, unfortunately, Fetch Policy does not affect this issue in any way. I would like that in the absence of an Internet connection, a mutation occurs in the cache and the result is returned to me.

[vincenzopalazzo]

I will try to look into it!

[Olega95]

In general, the solution is to simply return the submitted data in the desired form, that's all.

[vincenzopalazzo]

In general no-cache and only network need to fail in your case because you do not have an internet connection.

submitted data in the desired form

I don't understand what this means sorry!

In addition, your case is a particular case, so I will try to look more in deep, but without an example this cate time, sorry!