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 begin adding the needed dependencies.

Replace x.x.x with the latest version .

Kotlin Gradle ScriptGradle

dependencies {
    implementation("de.stuebingerb:kgraphql:x.x.x")
    implementation("de.stuebingerb:kgraphql-ktor:x.x.x")
}

dependencies {
    implementation "de.stuebingerb:kgraphql:x.x.x"
    implementation "de.stuebingerb:kgraphql-ktor:x.x.x"
}

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

Application.kt

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.