Cannot find field from parent interface

[yukchan]

a FieldResolverError is thrown when the field is defined at parent interface

at com.coxautodev.graphql.tools.FieldResolverScanner.missingFieldResolver(FieldResolverScanner.kt:55)
at com.coxautodev.graphql.tools.FieldResolverScanner.findFieldResolver(FieldResolverScanner.kt:46)
at com.coxautodev.graphql.tools.SchemaClassScanner.scanResolverInfoForPotentialMatches(SchemaClassScanner.kt:231)

[yukchan]

I guess getAllMethod should get the methods from interfaces as well:

internal class FieldResolverScanner(val options: SchemaParserOptions) {

private val allowedLastArgumentTypes = listOfNotNull(DataFetchingEnvironment::class.java, options.contextClass)

companion object {
    private val log = LoggerFactory.getLogger(FieldResolverScanner::class.java)

    fun getAllMethods(type: JavaType) =
            (type.unwrap().declaredMethods.toList()
                    + ClassUtils.getAllInterfaces(type.unwrap()).flatMap { it.methods.toList() }
                    + ClassUtils.getAllSuperclasses(type.unwrap()).flatMap { it.methods.toList() })
                    .asSequence()
                    .filter { !it.isSynthetic }
                    .filter { !Modifier.isPrivate(it.modifiers) }
                    // discard any methods that are coming off the root of the class hierarchy
                    // to avoid issues with duplicate method declarations
                    .filter { it.declaringClass != Object::class.java }
                    .toList()
}

}

[yukchan]

It is at line 24 of FieldResolverScanner.kt

Consider the following case:
[java]
public interface A { int getX(); }
public interface B extends A { int getY(); }

[graphql]
type A {
x: Int
y: Int
}

If we define B in graphql schema, the library cannot read getX() from interface A and throw FieldResolverError