entity Event {
    name String required,
    date LocalDate required,
    playersLimit Integer,
    cost BigDecimal,
    comment TextBlob
}

entity Registration {
    dateTime ZonedDateTime required,
    active Boolean required,
    playerName String,
    comment TextBlob
}

entity Charge {
    chargeDate LocalDate required,
    type ChargeType required,
    amount BigDecimal required,
    // User will be linked through a relationship, no need for an attribute here
}

enum ChargeType {
    CHARGE,
    PAYMENT
}

// Change the relationship to reflect composition
relationship OneToMany {
    Event{registrations} to Registration{event(name)}
}

// Declare User as a built-in entity
relationship ManyToOne {
    Registration{user(login)} to User with builtInEntity
}

relationship ManyToOne {
    Charge{event(id)} to Event
}

relationship ManyToOne {
    Charge{registration(id)} to Registration
}

relationship ManyToOne {
    Charge{user(login)} to User with builtInEntity
}

service Event with serviceClass

// No pagination as per your request

// Excluding DTOs as per your request
// noDto *