Variable is not updating despite having good #Query - spring-boot

Question

I want to update one variable for user.
Method:
fun blockUser(username: String): Boolean {
val user = userRepository.findUserByUsername(username)
if (user == null) {
throw UsernameNotFoundException("User not found by username: $username")
} else {
userRepository.blockUser(username)
}
val justToCheckIfUserIsUpdated = userRepository.findUserByUsername(username) //to be removed
return true
}
Query
#Modifying
#Transactional
#Query("update UserEntity c set c.isBlocked = TRUE WHERE c.username = :username")
fun blockUser(#Param("username") username: String)
Test:
#Test
fun `should block user when user exists`() {
//given
val userEntity = UserEntity(
username = "user",
phoneNumber = "500200300",
isBlocked = false,
email = "kupaa#wp.pl"
)
val userService = UserService(userDetailsRepository, userRepository, passwordEncoder)
userRepository.save(userEntity);
//when
userService.blockUser(userEntity.username);
//then
val blockedUser = userRepository.findUserByUsername(userEntity.username);
assertThat(blockedUser!!.isBlocked).isTrue()
}
While debugging you can see that isblocked is always true despite I updated it to true value.
Test ends with:
Expected :true
Actual :false
What I do wrong? I'm really confused.

Answer 1

When you do updates using JPQL, the updates go directly to the database. Hibernate doesn't magically update corresponding entities in the persistence context (the first level cache).
This userRepository.findUserByUsername(username) should get a user from the database (without the cache). But if you have a query cache enabled, the result can be loaded from the cache. You need to enable SQL logging and check the logs for that.
Also keep in mind that #Transactional above blockUser() method does nothing because spring boot creates a transaction for each test method. It doesn't mean that you have to remove #Transactional of course.