[XB] Custom Field Unique: Prevent Duplicate Custom Field Values

Compatible XF 2.x versions

License: Single Use License (may be used on one website)

Updates duration: 1 year ($10 Yearly Renewal)

Prevent duplicate values in custom fields.

This add-on ensures that values entered into selected custom fields remain unique across the system, helping maintain data consistency and preventing duplicate submissions.

Features:

Unique Value Validation: Prevent duplicate values from being entered into selected custom fields.
Per-Field Configuration: Enable uniqueness checks only for specific fields.

Supported Field Types:

User Fields
Thread Fields
XenForo Resource Manager:
- Resource Fields
- Resource Review Fields
[XB] Lessons:
- Classroom Fields
- Lesson Fields
[XB] Quizzes:
- Quiz Fields
[XB] Toplists:
- Toplist Fields
[XB] Donations:
- Campaign Fields
[XB] Movie Database:
- Movie Fields
- List Fields
[XB] Game Database:
- Game Fields
- List Fields
[XB] Book Database:
- Book Fields
- List Fields

Useful for:

Unique Identifiers: Ensure usernames, IDs, serial numbers, or other identifiers are not duplicated.
Data Integrity: Maintain clean and consistent custom field data.
Submission Validation: Prevent accidental duplicate entries.

More add-ons like this:

[XB] Custom Field Default Value - Set default values for custom fields automatically.
[XB] Custom Field Change Log - Track and review changes made to custom field values.
[XB] Custom Field View List Display - Display custom field values as lists instead of comma-separated values.
[XB] Custom Field Hidden Display Location - Store custom field values without displaying them publicly.
[XB] Custom Field Edit - Allow users to edit custom field values in separate page with dedicated permissions.
[XB] Custom Field Sorting - Easily sort custom fields in ACP.
[XB] Custom Field Access - Restrict access to custom fields with user group permissions.