Application failed to start due to an exception: "Description: A component required a bean named 'entityManagerFactory' that could not be found." - spring

Question

I've been trying to follow this guide here with slight deviations, but somehow my application doesn't start.
It's a Gradle-based build using Spring Boot and Kotlin.
The deviation I've mentioned before is I've configured it to use a Postgres-Db inside a Docker container instead of the H2-Db.
Here my build.gradle.kts:
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
plugins {
id("org.springframework.boot") version "2.6.2"
id("io.spring.dependency-management") version "1.0.11.RELEASE"
id("org.flywaydb.flyway") version "8.5.12"
kotlin("jvm") version "1.6.21"
kotlin("plugin.spring") version "1.6.21"
kotlin("plugin.jpa") version "1.6.21"
}
group = "com.snixtodolist"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_17
repositories {
mavenCentral()
}
dependencies {
implementation("org.springframework.boot:spring-boot-starter")
implementation("org.springframework.boot:spring-boot-starter-data-jpa")
implementation("org.springframework.boot:spring-boot-starter-jdbc")
implementation("org.springframework.boot:spring-boot-starter-web")
implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
implementation("org.jetbrains.kotlin:kotlin-reflect")
implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
developmentOnly("org.springframework.boot:spring-boot-devtools")
implementation("org.hibernate:hibernate-core:6.1.0.Final")
implementation("org.postgresql:postgresql")
implementation("org.flywaydb:flyway-core")
// only for tests
testImplementation("org.springframework.boot:spring-boot-starter-test")
}
tasks.withType<KotlinCompile> {
kotlinOptions {
freeCompilerArgs = listOf("-Xjsr305=strict")
jvmTarget = "17"
}
}
tasks.withType<Test> {
useJUnitPlatform()
}
flyway {
locations = arrayOf("db/migration/ALL")
target = "001"
baselineVersion = "001"
/** Use for PostGreSQL (local, Docker) */
url = "jdbc:postgresql://localhost:5432/snixtodolist" // local (PostGreSQL)
user = "snix"
password = "password"
}
tasks.flywayMigrate{
dependsOn(tasks.assemble)
}
Here my application.properties:
spring.datasource.url=jdbc:postgresql://localhost:5432/snixtodolist
spring.datasource.driver-class-name=org.postgresql.Driver
spring.sql.init.platform=postgres
spring.datasource.username=snix
spring.datasource.password=password
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.postgresql
spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
spring.jpa.hibernate.ddl-auto=validate
spring.jpa.show-sql=true
The error message I'm receiving is the follwoing:
2022-06-14 09:13:51.920 DEBUG 91518 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter : Application failed to start due to an exception
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:872) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1344) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:309) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:330) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:113) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:693) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:510) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:374) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:134) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1707) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1452) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:934) ~[spring-beans-5.3.14.jar:5.3.14]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.14.jar:5.3.14]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.14.jar:5.3.14]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.2.jar:2.6.2]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) ~[spring-boot-2.6.2.jar:2.6.2]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) ~[spring-boot-2.6.2.jar:2.6.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) ~[spring-boot-2.6.2.jar:2.6.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.2.jar:2.6.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) ~[spring-boot-2.6.2.jar:2.6.2]
at com.snixtodolist.snixtodolist.SnixtodolistApplicationKt.main(SnixtodolistApplication.kt:22) ~[main/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.6.2.jar:2.6.2]
It can't relate to WHY this is even needed in the first place:
"No bean named 'entityManagerFactory' available"?
All my repos are clearly annotated as "#Entity",
and in the included test, see below, I've tried to trigger it directly as "#Autowired" as a last bandage. Before that it wasn't entered at all, like specified in the guide.
package com.snixtodolist.snixtodolist.adapter.jpa
import com.snixtodolist.snixtodolist.domain.Task
import com.snixtodolist.snixtodolist.domain.TaskRepository
import org.assertj.core.api.Assertions.assertThat
import org.junit.jupiter.api.Assertions.assertEquals
import org.junit.jupiter.api.Assertions.assertTrue
import org.junit.jupiter.api.Test
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.boot.test.context.SpringBootTest
import org.springframework.transaction.annotation.Transactional
import java.time.LocalDateTime
import java.time.ZoneOffset
import javax.persistence.EntityManager
import javax.persistence.EntityManagerFactory
#SpringBootTest
#Transactional
class TaskRepositoryTest {
#Autowired
lateinit var repository: TaskRepository
#Autowired
lateinit var entityManagerFactory: EntityManagerFactory
#Autowired
lateinit var em: EntityManager
#Test
fun shouldPersistTask(
entityManagerFactory: EntityManagerFactory,
) {
val date = LocalDateTime.of(
2022, 6, 1, 22, 0, 0, 0
).atOffset(
ZoneOffset.systemDefault()
.rules
.getOffset(LocalDateTime.now())
)
val taskToSave = Task(
id = 0,
created_on = date,
title = "Streichen",
dueDate = date,
isDone = true,
)
val savedTask= repository.save(taskToSave)
em.flush()
em.clear()
val taskFromDb =
repository.findById(savedTask.id)
.orElseThrow()
assertThat(savedTask.title).isEqualTo(taskToSave.title)
assertThat(savedTask.id).isNotEqualTo(0)
assertEquals(date, taskFromDb.dueDate)
assertTrue(taskFromDb.isDone)
}
}
I'm out of options, I've tried several hints from stackoverflow pages,
but I can't get it to work.
Please help!