Hello. I am using Apollo to query the server. I wa...

# multiplatform

[AndreiBogdan]

Hello. I am using Apollo to query the server. I want to check if I have an IOException returned and if so, i consider it to be a case where there's no internet. Problem is that i can't check IOException for iOS. I tried this, usinv expect-actual but i get an error in the github action when building the library for iOS

actual fun isNetworkError(throwable: Throwable): Boolean {
    return (throwable as? NSError)?.domain == NSURLErrorDomain &&
            (throwable.code == NSURLErrorNotConnectedToInternet ||
                    throwable.code == NSURLErrorNetworkConnectionLost)
}

public val Char.code: Int defined in kotlin
e: file:///Users/runner/work/../shared/src/iosMain/kotlin/com/../shared/Platform.kt:93:31 Unresolved reference. None of the following candidates is applicable because of receiver type mismatch: 
93
public val Char.code: Int defined in kotlin

i'm guessing throwable.code is a Char instead of Int ?! I got the above from chatGPT, i tried to add throwable.code.toInt() but did not work. Got the same error

I'd do it another way entirely, but I have no clue how ...

[mbonnin]

Maybe it's a smart cast thing?

[mbonnin]

We have an integration test for that actually so it should be possible, cf https://github.com/apollographql/apollo-kotlin/blob/8d37c6119a43a620be175841050913[…]s/integration-tests/src/appleTest/kotlin/test/HttpEngineTest.kt

[mbonnin]

val cause = apolloNetworkException.platformCause
    // assertIs doesn't work with Obj-C classes so we rely on `check` instead
    // assertIs<NSError>(cause)
    check(cause is NSError)

    assertEquals(cause.domain, NSURLErrorDomain)
    assertEquals(cause.code, NSURLErrorCannotConnectToHost)

[mbonnin]

You'll have to check first that your exception is an instance of ApolloNetworkException and then that exception.platformCause is an instance of NSError and you shuold be ok

[AndreiBogdan]

CUCU :: userModel.throwable?.cause :: null
CUCU :: userModel.throwable :: com.apollographql.apollo3.exception.ApolloNetworkException: Failed to execute GraphQL http network request
CUCU :: (throwable as? NSError) :: null
CUCU :: throwable as? NSError)?.domain == NSURLErrorDomain :: false
CUCU :: (throwable as? NSError)?.code :: null

It seems the throwable is an ApolloNetworkException, but tehre's no cause ... it's null. either i'm doing something wrong or ... i have no idea...

[mbonnin]

It's platformCause

[mbonnin]

Apologies, I've just edited above