Closes: #48837

Summary

• Add key-value custom attributes to organization invitations
• Add application/json request body support to invite-user and invite-existing-user endpoints
• Preserve attributes on invitation resend
• Add Admin UI for managing invitation attributes with a 2-step modal flow

Changes

Backend

• New ORG_INVITATION_ATTRIBUTE table (jpa-changelog-26.7.0.xml) with FK cascade delete
• New OrganizationInvitationAttributeEntity JPA entity
• Extend OrganizationInvitationModel SPI with getAttributes() / setAttribute() / removeAttribute()
• Extend InvitationManager.createInvitation() with optional attributes parameter (backward-compatible default method)
• Add JSON @Consumes variants for invite-user and invite-existing-user endpoints alongside existing application/x-www-form-urlencoded endpoints
• New request types: OrganizationInvitationUserRequest, OrganizationInvitationExistingUserRequest
• Add attributes field to OrganizationInvitationRepresentation

Admin UI

• InviteMemberModal: switch from FormData to JSON body, add key-value attributes input (single-step flow for email invitations)
• InvitationAttributesModal: reusable attributes modal shared across all invite flows
• Invitations.tsx: 2-step flow using MemberModal (user selection) → InvitationAttributesModal (attributes) for existing user invitations
• Organizations.tsx (user detail page): 2-step flow using OrganizationModal (org selection) → InvitationAttributesModal (attributes)
• Invitations: show attributes count with tooltip displaying key-value details on hover

Organization details → Invite new user

Using InviteMemberModal:

Organization details → Invite existing user

Using OrganizationModal and InvitationAttributesModal (2-step flow):

↓

User details → Send invitation

Using MemberModal and InvitationAttributesModal (2-step flow):

↓

Attributes in an invitation list

Showing the number of the attributes:

Showing the attribute in a tooltip on hover:

Admin Client (JS)

• Add InviteUserRequest / InviteExistingUserRequest type definitions
• Add inviteUserJson / inviteExistingUserJson methods to organizations resource

Tests

• Invitation creation and retrieval with attributes
• Invitation resend preserves attributes
• Backward compatibility without attributes
• Existing user invitation with attributes
• Tests written using the new test framework (tests/base/)

API

POST /admin/realms/{realm}/organizations/{id}/members/invite-user
Content-Type: application/json

{
  "email": "user@example.com",
  "firstName": "John",
  "lastName": "Doe",
  "attributes": {
    "department": ["engineering"],
    "role": ["developer", "reviewer"]
  }
}

POST /admin/realms/{realm}/organizations/{id}/members/invite-existing-user
Content-Type: application/json

{
  "id": "<user-id>",
  "attributes": {
    "department": ["engineering"]
  }
}

Migration

• New ORG_INVITATION_ATTRIBUTE table added in jpa-changelog-26.7.0.xml
• No impact on existing data

Backward Compatibility

• Existing application/x-www-form-urlencoded endpoints remain unchanged
• InvitationManager SPI maintains existing method signatures via default methods
• Invitations without attributes continue to work as before