I’m trying to set up Flyway to work with H2 in a spring boot 3 r2dbc app (Flyway is working when I connect to mysql instead). In application.yml I have:

spring:
  r2dbc:
    url: r2dbc:h2:mem:///~/db/
    name: testdb
    username: sa
    password:
  flyway:
    url: jdbc:h2:mem:///~/db/testdb
    user: ${spring.r2dbc.username}
    password: ${spring.r2dbc.password}
    baseline-on-migrate: true

Then I have in `V1_1__create_users_and_posts_tables.sql`:

CREATE TABLE IF NOT EXISTS users
(
     id bigint NOT NULL AUTO_INCREMENT,
     username varchar(255) NOT NULL DEFAULT '',
     email varchar(255) NOT NULL DEFAULT '',
     phoneNumber varchar(255) NOT NULL DEFAULT '',
     PRIMARY KEY (id)
);

CREATE TABLE IF NOT EXISTS posts
(
     id bigint NOT NULL AUTO_INCREMENT,
     userId bigint NOT NULL,
     title varchar(255) NOT NULL DEFAULT '',
     description varchar(255) NOT NULL DEFAULT '',
     PRIMARY KEY (id)
);

It works but it creates a PUBLIC schema:

Database: jdbc:h2:mem:///~/db/testdb (H2 2.2)
Flyway upgrade recommended: H2 2.2.224 is newer than this version of Flyway and support has not been tested. The latest supported version of H2 is 2.2.220.
Schema history table "PUBLIC"."flyway_schema_history" does not exist yet
Successfully validated 2 migrations (execution time 00:00.009s)
Creating Schema History table "PUBLIC"."flyway_schema_history" ...
Current version of schema "PUBLIC": << Empty Schema >>
Migrating schema "PUBLIC" to version "1.1 - create users and posts tables"
Migrating schema "PUBLIC" to version "2.1 - create images table"
Successfully applied 2 migrations to schema "PUBLIC", now at version v2.1 (execution time 00:00.003s)

But when I call one of my api endpoints, I see this error:

Caused by: io.r2dbc.spi.R2dbcBadGrammarException: Table "USERS" not found (this database is empty);

I tried changing the testdb name for PUBLIC in my application file and creating the tables under the PUBLIC schema but I still get the same error. Any ideas anyone ? (The repo is here: https://github.com/danygiguere/spring-boot-3-reactive-with-kotlin-coroutines)

Hi, I'm using moshi+retrofit and trying to sort out proguard setup I have a class:

data class PingResponse(
    @Json(name = "needs_update") val shouldUpdate: Boolean,
)

And it works fine in debug, but with release minification it crashes with the following:

IllegalArgumentException: No property for required constructor parameter #0 shouldUpdate of fun `<init>`(kotlin.Boolean): not.minimized.package.PingResponse

It works fine if I apply

@JsonClass(generateAdapter = true)

to class. As per documentation it sounds like I only need to apply

@JsonClass(generateAdapter = false)

to enums, and the rest should work out of the box. I find it very tricky that it works in debug without this annotation but fails in release. This comment suggests not minimizing all the models, but I don't find it much useful in my case, as I don't store all the models in one package. I can apply

@JsonClass(generateAdapter = true)

to all my models, the biggest issue is that if I forget to do that I won't know there's a problem until I run release version. Am I missing some other way to set it up, or is there a way to make app crash in debug(or build time check?), same as it does in release, in case when model has no

JsonClass

annotation?

i can't invoke the composable function inside of button onclick.and, I getting this error '@Composable invocations can only happen from the context of a @Composable function'

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Why is there

mutableStateListOf

and 

mutableStateMapOf

but no

mutableStateSetOf

?

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Is there an idiomatic way to create a dynamic Proxy in Kotlin? I've been trying with

java.reflect.Proxy

with awful results This proxy job is to intercept, detect if a particular exception is throw and if so unwrap it and throw the underlying exception. This has to work with suspend functions

class UnwrapExceptionProxy<T>(private val instance: T): InvocationHandler {
    @Suppress("UNCHECKED_CAST")
    override fun invoke(proxy: Any, method: Method, args: Array<out Any?>?): Any? {
        val function = method.kotlinFunction!!

        return if (function.isSuspend) {
            val parameters = Array(args!!.size - 1) {args[it] }
            val continuation = args.last() as Continuation<Any?>
            method.invoke(instance, *parameters, Continuation<Any?>(continuation.context) { result ->
                val wrappedError = result.exceptionOrNull() as? MyWrapException
                if (wrappedError == null) {
                    continuation.resumeWith(result)
                } else {
                    continuation.resumeWith(Result.failure(wrappedError.wrapped))
                }
            })
        } else {
            val parameters = args ?: arrayOf()
            try {
                method.invoke(instance, *parameters)
            } catch (e: MyWrapException) {
                throw e.wrapped
            }
        }
    }
}

1. First, I'm not sure if I've handled the suspend function correctly 2. I get

java.lang.reflect.UndeclaredThrowableException

every time my kotlin code throws a non

RuntimeException

Is there no way to write a Proxy for kotlin? I cannot force declaring all checked exceptions and I wanted to make this as transparent as possible.

Hi, I am trying to integrate paparazzi in our project, but I am running into two issues, possibly because we're doing things the wrong way in our project. Describing them takes a lot of text, so I will do it in a thread 🧵

Is it possible now to make declaration which returns Promise from JS accessible from K/WASM?