Hi all, I'm learning Kotlin + Ktor + Graphql by following this tutorial. However, when I run the server and visit http://localhost:8080/graphql I do not see the graphql playground 🤔 Here's what I did so far: • created the project using the project builder on ktor.io • added the kgraphql_version in gradle.properties • updated the build.gradle.kts with the line mentioned in the tutorial • in the tutorial

src/Application.kt

is mentioned but my automatically generated

Application.kt

file is under

src/main/kotlin/com.ryanzidago/Application.kt

🤔 Here's the content of my

Application.kt

package com.ryanzidago

import io.ktor.server.engine.*
import io.ktor.server.netty.*
import com.ryanzidago.plugins.*

import io.ktor.application.Application
import io.ktor.application.install
import com.apurebase.kgraphql.GraphQL

fun main() {
    embeddedServer(Netty, port = 8080, host = "0.0.0.0") {
        configureRouting()
    }.start(wait = true)
}
fun Application.module(testing: Boolean = false) {
    install(GraphQL) {
        playground = true
        schema {
            query("hello") {
                resolver { -> "World" }
            }
        }
    }
}

Intellij tells me that there is a problem with the

install

(Not enough information to infer type variable B) and

playground

(Variable expected) but I cannot figure out what is wrong 🤔 When I type

gradle --version

in my project root I get the following output:

ariviv 
❯ gradle --version

------------------------------------------------------------
Gradle 7.3.3
------------------------------------------------------------

Build time:   2021-12-22 12:37:54 UTC
Revision:     6f556c80f945dc54b50e0be633da6c62dbe8dc71

Kotlin:       1.5.31
Groovy:       3.0.9
Ant:          Apache Ant(TM) version 1.10.11 compiled on July 10 2021
JVM:          17.0.1 (Oracle Corporation 17.0.1+12-39)
OS:           Linux 5.4.0-94-generic amd64

Any tips?

Does the app start? In general

/graphql

would be used to accept queries (through POST or GET). Unsure how

kgraphql

does the routing but I've often seen (and we do it in

graphql-kotlin

) the specific

/playground

routes (or

/graphiql

,

/voyager

etc) for the tooling.

Yes the app starts:

Regarding the errors in IntelliJ, try to refresh the Gradle project. This shows that you have unsynced changes:

this ⬆️

Alright, I did it and it seems that now, the error is gone. However, I still can't visit the endpoint 🤔

not familiar with that lib so won't be much help based on https://github.com/aPureBase/KGraphQL/blob/main/kgraphql-ktor/src/main/kotlin/com/apurebase/kgraphql/KtorFeature.kt#L66 it does use same

/graphql

endpoint for surfacing

playground

using GET requests (which does not follow best practices defined in https://graphql.org/learn/serving-over-http/)

Yeah, that didn't change anything but what IntelliJ sees when displaying to you.

Application.module

color-wise looks unused, should that be called somewhere?

we (I am one of the maintainers of

graphql-kotlin

) don't have a tutorial for ktor (there is one for Spring) but there is an example app -> https://github.com/ExpediaGroup/graphql-kotlin/tree/master/examples/server/ktor-server maybe that can be of some help

The tutorial says add lines to

module

, but I guess this just does not fit the generated template anymore, also because the path is differently and that you simply added the whole function

Thanks @Dariusz Kuc I'll definitely look into it.

Ask them? Especially to update the outdated tutorial?

I need to get this done for a take home task 🤷 I guess by the time they'll update the docs it might be too late 😅

But they might answer faster than they update the docs. It seems here you will not get help as noone (at least active right now) knows what that is about.

Alright thank you very much for your time 🙏