Add-ons Themes Blog

Log in Create account

Unique Field

v1.0.2 Patch Level 1 · XenForo 2.2.0+ · Updated 1 year ago

by D.C Style · Add-ons

Any new content with this field value will have to be unique.

v1.0.2 Patch Level 1
XenForo 2.2.0+
Updated 1 year ago
32 KB

Free No account needed

Download v1.0.2 Patch Level 1 32 KB

Released Aug 19, 2025 · 1 version available · Get support

Licence & help

Use on one XenForo installation
Free updates, no renewal needed

View Documentation Get support

What your licence covers

1XenForo install

Freeupdates, no renewal

Documentation Get support

More in Add-ons

AI Disclosure Label Free

Quote Backlinks Free

AI Crawler Blocklist Free

Real Views $39.00

View more in Add-ons →

Unique Field is a XenForo add-on that lets you make any supported custom field unique. When you set a custom field to be unique, any new content saved with that field value must not already exist. If the value already exists, the content will not be saved. This helps prevent duplicate entries, such as duplicate usernames, thread titles, or other custom field data.

How It Works

After installing Unique Field, you can edit a custom field and enable the unique option. Then, when a user submits content that includes that field, the add-on checks if the submitted value is already used elsewhere. If it is, the submission is blocked. This keeps your custom field values one of a kind.

Supported Custom Field Types

The add-on currently supports these XenForo custom field types:

Thread Custom Fields
User Custom Fields

For example, if you have a Thread Custom Field for "Project ID", enabling unique means no two threads can have the same Project ID. Similarly, for a User Custom Field like "Employee Number", each user must have a different value.

This add-on is straightforward to use and helps maintain clean, duplicate-free data in your XenForo forum.

My forum runs

Release	Needs XenForo	Tested on	PHP
1.0.2 Patch Level 1 19 Aug 2025	2.2.0+	—	—

"Needs" is the oldest version a release installs on. Something not working on yours? Tell us.

Unique Field guides

1

1 guide in the Knowledge Base Step-by-step help from the Knowledge Base, in the order to read them.

All docs →

Make a custom field unique with Unique Field Stop two members, or two threads, from using the same value in a custom field. Where the setting lives and how the duplicate rules work. Beginner 3 min · Add-on Guides Add-on Guides Beginner 3 min

Open Unique Field docs

Need Unique Field to work differently? We can extend it for your forum, built on the same code and kept compatible with updates. Ask us

Reviews

Sign in to write a review

No reviews yet. Only customers who downloaded or bought it can review.

Questions 5

Answered by the D.C Style team.

Sign in to ask a question

It is free and works on XenForo 2.2.0 or later. Install the add-on, then open the custom field you want to control and tick Field is unique. There are no options pages or permissions to set up.

Answered by D.C Style · 1 month ago

Custom user fields and custom thread fields. User fields are in Users > Custom user fields and thread fields are in Forums > Custom thread fields. Fields added by other add-ons, such as resource or media fields, are not covered.

Answered by D.C Style · 1 month ago

Open the field in AdminCP and tick Field is unique, then save. The setting sits on each custom field's own edit page, so you repeat it for every field you want to control. There is also a tip in the guide to test it with a test member or thread before announcing it.

Answered by D.C Style · 1 month ago

Yes. The Field allowed duplicated values setting takes a comma-separated list of values anyone may reuse, for example none, n/a, and it applies to text and single-choice fields. Two other settings loosen the rule further: how many characters a new value may share with an existing one, and how many times the same value may be used. If you set a character limit, the duplicated-times setting is not used.

Answered by D.C Style · 1 month ago

No. Existing values are not checked, so two members or threads that already share a value keep it. The rule applies to new values entered after you tick Field is unique. When a value is already taken, the person sees "Please enter a unique value for this field. Another content has already had this field value." and can try again.

Answered by D.C Style · 1 month ago

What do I need to run Unique Field?

It is free and works on XenForo 2.2.0 or later.

Install the add-on, then open the custom field you want to control and tick Field is unique. There are no options pages or permissions to set up.

Answered by D.C Style · 1 month ago

Which custom field types can I make unique?

Custom user fields and custom thread fields.

User fields are in Users > Custom user fields and thread fields are in Forums > Custom thread fields. Fields added by other add-ons, such as resource or media fields, are not covered.

Answered by D.C Style · 1 month ago

How do I make a custom field unique?

Open the field in AdminCP and tick Field is unique, then save.

The setting sits on each custom field's own edit page, so you repeat it for every field you want to control. There is also a tip in the guide to test it with a test member or thread before announcing it.

Answered by D.C Style · 1 month ago

Can some values be repeated, like n/a or none?

Yes.

The Field allowed duplicated values setting takes a comma-separated list of values anyone may reuse, for example none, n/a, and it applies to text and single-choice fields. Two other settings loosen the rule further: how many characters a new value may share with an existing one, and how many times the same value may be used. If you set a character limit, the duplicated-times setting is not used.

Answered by D.C Style · 1 month ago

Are values entered before I made the field unique checked?

No.

Existing values are not checked, so two members or threads that already share a value keep it. The rule applies to new values entered after you tick Field is unique. When a value is already taken, the person sees "Please enter a unique value for this field. Another content has already had this field value." and can try again.

Answered by D.C Style · 1 month ago

Still unsure? Ask us →

Unique Field

Free · v1.0.2 Patch Level 1

Download v1.0.2 Patch Level 1