Filter by extension does not shown any result after duplicate a MIME type

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.4.13 DXP GA1, Master
• Component/s: Content Dashboard
• Labels:
  • 7.4-known-issues
• Fix Priority: 4
• Sprint: TANGO | #66 DEV | Aug27-Sep17

Step-by-Step:

1. Add some documents with different extensions
2. Go to the Content Dashboard
3. Open the Filter by extension modal
4. Assert that the extensions added appear in the modal
5. Go to System Settings > Documents and media
6. Add a new extension that is already created (for example, application/zip)
7. Go to the Content Dashboard
8. Open the Filter by extension modal

Actual result:
The modal is empty and it does not show any extension available

Expected:
The modal remains the same as before, since the duplicated MIME type should not impact in the user experience.

NOTE: This do not have workaround, after "breaking" the filter, it is not possible to recover it again, even deleting the duplicated extensions in System Settings

Environment: localhost
Github: https://github.com/liferay/liferay-portal.git
Branch: master
Bundle: Liferay DXP
Last Commit: 5d704f735fc212e91ac6e4fcf7d4edf1fc7667ac

Evidence:

Browsers:

• Chrome Latest