Unique

The Unique property ensures that the value of a field does not repeat across entries within the same content type. It helps maintain data integrity by preventing duplicate values.

When you mark a field as Unique in a content type, Contentstack enforces the following rules:

• The field value must be different from the value in the same field of all other entries in that content type.
• If you enter a value that already exists, Contentstack displays a warning and blocks the save action until the value is changed.

Unique Fields While Copying an Entry

When you copy an entry that includes fields marked as Unique, Contentstack automatically appends a timestamp to those field values. This prevents conflicts and ensures the copied entry can be saved successfully.

This applies to:

• Both Master Only and All Locales copy modes
• All fields marked as Unique
• Localized entries included in an All Locales copy

Example:

If a Unique field originally contains: promo-code

After copying, it becomes: promo-code – Copy (2025-01-10 14:22:18)

This adjustment ensures that the copied entry remains valid and does not trigger a uniqueness error during the save process.

The Unique property helps maintain data accuracy by preventing duplicate values within a content type. By automatically handling Unique fields during entry duplication, Contentstack streamlines content creation while preserving data integrity. Use this feature to ensure your content model supports reliable, conflict-free data entry across all locales and workflows.