Spring Kotlin router DSL

Reports unused path variables in Kotlin router DSL as well as usages of undeclared path variables.

Path variables must be declared in the route path before access. Attempt to access an undeclared path variable will result in a runtime error.

Example:

@Configuration
class RouterConfiguration {
    @Bean
    fun myRouter() = router {
        GET("/test/{var}") { ServerResponse.ok().body("${it.pathVariable("bar")}") }
    }
}

After the fix is applied:

@Configuration
class RouterConfiguration {
    @Bean
    fun myRouter() = router {
        GET("/test/{var}") { ServerResponse.ok().body("${it.pathVariable("var")}") }
    }
}

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

PathVariableKotlinRouterDsl

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Spring | Kotlin

Inspection ID: PathVariableKotlinRouterDsl

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection PathVariableKotlinRouterDsl

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, Qodana for JVM 2025.3,

Last modified: 03 December 2025