Confused about cache behavior

[guendev]

Question

Why doesn't the object update automatically when calling mutation?
My workflow: query setting -> mutation updateSetting. After that, if I query settings, It will return an updated object from cache (updated by updateSetting) if they have the same cache-id. It always works on javascript.

But when I did the same with apollo-ios. Cache doest update, it always returns the value from the first time.

Btw, are there any way to print all existing object?

My swift code

        Network.shared.apollo.perform(mutation: UpdateMotherTongueMutation(input: input)) { result in
            guard (try? result.get().errors) == nil else {
                return
            }
            // call function to query:  `SettingQuery`
        }
        
        
        Network.shared.apollo.fetch(query: SettingQuery()) { [weak self] result in
            guard let self = self else { return }

            let data = try? result.get().data
            // save data...
        }

My Operations

query Setting {
  setting {
	id
	activeCourse {
	  id
	}
	motherTongue {
	  id
	  name
	  code
	}
	...more fields
  }
}

mutation UpdateMotherTongue($input: UpdateSettingInput!) {
  updateSetting(input: $input) {
	id
	motherTongue {
	  id
	  name
	  code
	}
  }
}

[calvincestari]

Hi @guendev, it sounds like you haven't configured a cache key that Apollo iOS can use to normalize the object from your query and mutation. The web client has a more advanced cache and may be doing some of that automatically for you whereas Apollo iOS requires you to be explicit about identifying similar objects.

I suggest reading the Normalizing responses section of the documentation which explains how responses are normalized without a custom cache key. Then move on to reading the Normalizing objects by cache key section which will guide you how to return a custom cache key for your object. Once you've got the custom cache key configured correctly you should get the behaviour you're looking for.

I'm going to close this issue as there is no action for us to take here but I'm happy to continue the conversation with you here if you can't figure out the cache key.

[github-actions]

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