graphql-kotlin alias issue reproduction

This project is a minimal reproduction of an issue with graphql-kotlin where aliases are not considered sufficiently during the generation of result classes.

Take the following schema and query:

# schema.graphql
type Artifact {
    artifactName: String!
    someValue: String!
}

type Component {
    componentName: String!
    artifact(artifactName: String!): Artifact
}

type Bundle {
    bundleId: String!
    component(componentName: String!): Component
}

type Query {
    getBundle(bundleId: String!): Bundle
}

# GetBundleQuery.graphql
query GetBundleQuery($bundleId: String!) {
    getBundle(bundleId: $bundleId) {
        bundleId
        componentFoo: component(componentName: "foo") {
            componentName
            artifactLorem: artifact(artifactName: "lorem") {
                artifactName
                someValue
            }
        }
        componentBar: component(componentName: "bar") {
            componentName
            artifactIpsum: artifact(artifactName: "ipsum") {
                artifactName
                someValue
            }
        }
    }
}

Running mvn clean compile generates the following classes inside the target directory:

// Bundle.kt
@Generated
public data class Bundle(
    public val bundleId: String,
    public val componentFoo: Component? = null,
    public val componentBar: Component? = null,
)

// Component.kt
@Generated
public data class Component(
    public val componentName: String,
    public val artifactLorem: Artifact? = null,
)

// Artifact.kt
@Generated
public data class Artifact(
    public val artifactName: String,
    public val someValue: String,
)

The generated Bundle class uses the Component class for both componentFoo and componentBar fields. The Component class only contains the artifactLorem field, making it impossible to access the artifactIpsum field on the componentBar component.

Instead, graphql-kotlin should generate something like this:

// Bundle.kt
@Generated
public data class Bundle(
    public val bundleId: String,
    public val componentFoo: Component1? = null,
    public val componentBar: Component2? = null,
)

// Component1.kt
@Generated
public data class Component1(
    public val componentName: String,
    public val artifactLorem: Artifact? = null,
)

// Component2.kt
@Generated
public data class Component2(
    public val componentName: String,
    public val artifactIpsum: Artifact? = null,
)

// Artifact.kt
@Generated
public data class Artifact(
    public val artifactName: String,
    public val someValue: String,
)

WIStudent/graphql-kotlin-alias-issue-reproduction

graphql-kotlin alias issue reproduction