'userDetails' at relationship 'user' but no back-reference was found

[ken4ward]

Overview of the issue

I encountered a warning when defining a one-to-one relationship between UserDetails and the built-in User entity in JHipster. The warning states:

WARNING! Ignoring 'UserDetails' definitions as it is using a built-in Entity 'user': 'otherEntityRelationshipName' is set with value 'userDetails' at relationship 'user' but no back-reference was found

Despite various attempts to adjust the relationship structure, the issue persists.

JHipster JDL

JDL definitions

Examples of relationships I have tried
relationship OneToOne {
  UserDetails to User with builtInEntity
}
relationship OneToOne {
 UserDetails{user(login) required} to User with builtInEntity
}
none worked
entity UserDetails {

id UUID,

firstName String required,

lastName String required,

gender Gender required,

country String,

dateOfBirth LocalDate,

createdAt Instant required,

updatedAt Instant required

}

• JDL is mandatory for bug reports. This will allow us to use automated tests and generate the broken sample using jhipster from-issue command.

Motivation for or Use Case

This issue prevents proper association of additional user details with the built-in User entity, limiting customization and extension.

Reproduce the error

1. Define the UserDetails entity.
2. Create a one-to-one relationship with the built-in User entity.
3. Run JHipster generation.
4. Observe the warning about missing back-reference.

Related issues

Suggest a Fix

Potential solutions attempted:

• Explicitly adding {user} to UserDetails
• Removing {user} binding
• Checking JHipster version compatibility
• Reviewing GitHub discussions and similar reports

JHipster Version(s)

8.10.0

Browsers and Operating System

• Tickets opened without reproduction steps or that don't follow the template recommendation will be closed.
• Checking this box is mandatory (this is just to show you read everything)

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[ken4ward]

@jkutner @mraible @jdigger please any help to resolve this issue? Thank you very much all. Jhipster is a ground breaking genius product.

[mshima]

We don’t have support to relationships on the User side implemented.
One To One relationships require bidirectional relationship, which is not supported on User side.
That’s the reason for the warning.

[ken4ward]

@mshima would you please give a sample code that should work in my case. Thank you.

[mshima]

@ken4ward something is broken?
The feature is missing that’s the reason for the warning.
To avoid the warning you can convert to a ManyToOne relationship.

[ken4ward]

@mshima Is it just a warning or it truly impacts the relationship as suggested by the warning log? I have used ManyToOne and it worked without the warning. However using it implies there'll be multiple records of userdetails per user. Thanks a lot for your quick response