Custom field value is lost when a user don't have EDIT permission on that custom field editing a wiki page

• Type: Technical Task
• Status: Closed
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 6.2.X EE, 7.0.0 M6
• Component/s: Portal Configuration, Portal Configuration > Custom Fields
• Labels:
  • liferay-fixpack-portal-105-6210
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed

Reproduction steps:

1. Start vanilla Liferay and login with OmniAdmin user
2. Go to Admin > Control Panel > Roles
3. Create a new regular role called editor
4. Define the following permissions for such role:
   Custom Fields > Custom Field: View
   Wiki > Wiki Page: Update
5. Go to Users and Organizations, Add a new user called contenteditor, assign him to the Liferay site with role editor
6. Go to Control Panel > Configuration > Custom Fields > Wiki Page
7. Click Add Custom Field. Key: "Approver" // Type: Text Field - Indexed. Save
8. Go to the Welcome page and place a Wiki portlet onto it
9. Add a wiki page with setting the "Approver" approver custom field to "readonlyfield". Click Publish.
10. Click again Edit, then Custom Fields and assert the text "readonlyfield" has been saved and it's visible. Close the window without making any change
11. Login with the contenteditor user and open the wiki page in edit mode. Assert that the custom field value is visible in read only mode
12. Publish the wiki page without making any change. Open again the wiki page in edit mode and check the Custom field value:

Expected: The value to be preserved and visible in read only mode
Actual behavior: the custom field value has disappeared