If I have this as my configuration properties: ``...

# spring

[dodalovic]

If I have this as my configuration properties:

kotlin
@ConstructorBinding
@ConfigurationProperties("company")
class UsersProperties(val users: Map<String, User>) {
    data class User(
        val password: String,
        val companyName: String,
        val accounts: List<String>
    )
}

and this in my application.yaml

yaml
company:
  users:
    <mailto:[e-mail]|[e-mail]>:
      password: admin
      companyName: Company 1
      accounts: [ "ACC1", "ACC2" ]
    <mailto:[e-mail]|[e-mail]>:
      password: user
      companyName: Company 2
      accounts: [ "ACC3", "ACC4" ]

spring complains that users property can't be null

Any idea?

Thanks in advance

[jbnizet]

This has to do with the dot in the emails. Spring transforms this Yaml into properties-based documents, and the properties are thus named [e-mail] for example, where the dot in the email address now becomes a property separator. You should probably use a list of users, with an additional email property, and simply have a toMap() method in the properties that returns the list of users as a map.

[dodalovic]

Thanks, that'll do the trick!