Adding a duplicate title to a Temporary List causes an "Internal Server Error"

[Christine Morgan]

Evergreen 2.10.5 and earlier

In the public catalog, if you add the same title record to a Temporary List more than once, you get an Internal Server Error when you try and access your Lists. Since you can't tell what titles you have already added, when logged in to your account, adding a duplicate record could occur frequently. (See related bug: https://bugs.launchpad.net/evergreen/+bug/1182547)

To see the problem:
1. Log in to your account.
2. Add the same title record twice to a Temporary List.
3. Click on "Lists" in the account dashboard or "View My Lists" on the results screen.

[Cesar V (cesardv)]

The code in the branch below should prevent the mylist page from crashing when there are duplicate title added to the temp list:

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/cesardv/lp1624443_prevent_crash_due_OPAC_tempList_dups

[Chris Sharp (chrissharp123)]

Got this working.

Signoff branch at http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/csharp/lp1624443_prevent_crash_due_OPAC_tempList_dups.

[Galen Charlton (gmc)]

Pushed to master and rel_2_12. Thanks, Cesar and Chris!