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Fully functional GraphQL & Ktor server

We will be using the ktor intellij plugin to get setup.

The very first thing we'll be doing is creating a new IntelliJ project and use the ktor template.

After this we'll press "Next" and fill out the necessary information and then press "Finish". Now we have a brand new ktor project. Now we can add the dependencies needed to our gradle.properties and build.gradle.kts files.

kgraphql_version=x.x.x

Replace x.x.x with the latest version Maven Central.

val ktor_version: String by project val kotlin_version: String by project val logback_version: String by project val kgraphql_version: String by project // <-- Add this line ... dependencies { implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version") implementation("io.ktor:ktor-server-netty:$ktor_version") implementation("ch.qos.logback:logback-classic:$logback_version") implementation("com.apurebase:kgraphql:$kgraphql_version") // <-- Add these two lines implementation("com.apurebase:kgraphql-ktor:$kgraphql_version") // <-- Add these two lines testImplementation("io.ktor:ktor-server-tests:$ktor_version") } 
dependencies { implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version" implementation "io.ktor:ktor-server-netty:$ktor_version" implementation "ch.qos.logback:logback-classic:$logback_version" implementation "com.apurebase:kgraphql:$kgraphql_version" // <-- Add these two lines implementation "com.apurebase:kgraphql-ktor:$kgraphql_version" // <-- Add these two lines testImplementation "io.ktor:ktor-server-tests:$ktor_version" }

The only thing left is installing the GraphQL feature onto our server by opening src/Application.kt and use these lines as the Application.module function

fun Application.module(testing: Boolean = false) { install(GraphQL) { configureRouting() playground = true schema { query("hello") { resolver { -> "World" } } } } }

Now we have a fully functional GraphQL Server and we can startup our server by pressing the green play icon beside the main function.

We can test out our server by going to localhost:8080/graphql and our hello query should work by providing this query to the GraphQL Playground

A great place to learn more is following the Star Wars tutorial. Everything mentioned in this tutorial can be placed inside the schema {} block.