Legacy Knowledge Base
Published Sep. 10, 2025

Headless API: Read-Only and Write-Only fields

Written By

Jose L. Bango

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Issue

  • Schemas used by Headless API have fields with properties readOnly: true or writeOnly: true. What does it mean?
  • Which field must be used when making a POST/PUT/PATCH request?

Environment

  • Any Liferay environment using Headless API

Resolution

  • readOnly properties are included in responses but not in requests.
  • writeOnly properties may be sent in requests but not in responses.
  • Thus, for POST/PUT/PATCH request, avoid readOnly fields. Instead, you must use writeOnly fields (or those without readOnly/writeOnly properties since both properties are false by default).

Additional Information

 

 

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