Generated Connection and Edge types are not recognized in IntelliJ

[LajosPolya]

I'm implementation Relay Pagination but my type's Connection and Edge are not recognized in my schema. The application is able to start up fine but I get an error message in IntelliJ.

build.gradle.kts

plugins {
    id("com.netflix.dgs.codegen") version "5.1.17"
}

dependencies {
    implementation(platform("com.netflix.graphql.dgs:graphql-dgs-platform-dependencies:5.2.4"))
    implementation("com.netflix.graphql.dgs:graphql-dgs-webflux-starter")
    implementation("com.netflix.graphql.dgs:graphql-dgs-extended-scalars")
    implementation("com.netflix.graphql.dgs:graphql-dgs-pagination")
}

tasks.withType<GenerateJavaTask> {
    schemaPaths = mutableListOf("$projectDir/src/main/resources/schema")
    packageName = "com.exaple.schema"
    generateClient = false
    typeMapping = mutableMapOf(
        Pair("MyCustomTypeConnection", "graphql.relay.SimpleListConnection<MyCustomType>")
    )
}

schema.graphql
I get an error in this file stating that Unknown directive "connection".
I can remove this error by adding directive @connection on OBJECT as described here #507

I also get the error Unknown type "MyCustomTypeConnection"

type MyCustomType @connection {
    id: Long
    name: String!
}

type Query {
  getMyCustomTypes(first: Int!, after: String): MyCustomTypeConnection
}

The code compiles and run fine. I'm able to fetch paginated items but I'd like to get rid of the error Unknown type "MyCustomTypeConnection" in IntelliJ?

I also can't find the generated classes for the Connection and Edge types in the build directory.

[srinivasankavitha]

The @connection directive is specific to the DGS framework and treats it specially by internally generating the SDL type MyCustomTypeConnection at runtime. This is not generated at build time. Also note that this will not generate corresponding POJOs (and hence will not be present in the build directory). The expectation is for the user to map it to the corresponding relay custom type. IntelliJ is unable to understand the runtime generated SDL type and that is why you see the error.
To fix this , we will need to add logic in the DGS IntelliJ Plugin to detect this and suppress it. We have an issue to track that : Netflix/dgs-intellij-plugin#30