After upgrading from 6.1.20 to 6.2.10 and then to 6.2.x, DDL record file upload fields are showing up as blank

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.X EE
• Fix Version/s: 6.2.X EE
• Component/s: Dynamic Data Mapping > Upgrades
• Labels:
  • ee-6.2.x-only
  • liferay-fixpack-portal-106-6210
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Story Points: 1.5
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/13263

After upgrading from 6.1.20 to 6.2.10 and then to 6.2.x, DDL record file upload fields are showing up as blank.

Steps

1. Take a 6.1.20 bundle.
2. Place a DDL Display portlet on a page.
3. Create a DDL definition and put a File Upload field on it.
4. Create a DDL list based on this definition and add a record to it.
5. Upgrade to 6.2.10.
6. Set the following in portal-ext.properties:

   verify.frequency=-1

7. Upgrade to 6.2.x.

Expected
File upload column has content and link to file.
Actual
File upload column is empty.