dynamic user creation failed - user name already exists

[gepparta]

My colleague is trying to access this event:
https://sitregparticipant-a5a504e08.dispatcher.hana.ondemand.com/index.html#/Events/47

Her s-user is S0018843662.

After Login she is getting following error:

Maybe this is relevant:

She is also entered as a co-organizer in
https://sitregorganizer-a5a504e08.dispatcher.hana.ondemand.com/index.html#/Events/47

[gregorwolf]

Please ask her to try again. I've enabled now the SAML Login for the account S0018843662 which seems to be created when you add the co-organizer. Unfortunately this user isn't created with the SAML configuration. Until now nobody was affected as Co-Organizers have used the app before as participants and where automatically created by accessing the participant UI.

[gepparta]

She tried it again. but unfortunately with same result.

[gregorwolf]

Please let her try again.

[gepparta]

Gregor, Its working now :-)
Thanks a lot

[JohannesKonings]

I have the same error when I open https://sitregparticipant-a5a504e08.dispatcher.hana.ondemand.com/index.html

I'm not a Co-Organizer.

My S-User is S0018906781

[gregorwolf]

Hi @JohannesKonings please try again.

[JohannesKonings]

Thanks for the fast respond. I'm now a step further.
But unfortunately I still can not register hier https://sitregparticipant-a5a504e08.dispatcher.hana.ondemand.com/index.html#/Events/51

[gregorwolf]

@hendrik77 reported a simmilar issue here: sapmentors/SITreg#51. Please remove the @ before your Twitter username and it should work. The column is defined as a char 15 (https://github.com/sapmentors/SITreg/blob/master/data/SITreg.hdbdd#L108) as this is the maximum length of twitter usernames (afaik).

[JohannesKonings]

Thank you, that was the problem.

[CBasis]

Wondering if the twitter field is really the root cause.
I was able to enter my twittername with a @ and got no error.

Seems that both is/was possible to enter as it can be seen in the list with both:

-- update
Ah, I got it! It was only in Johannes Twitterhandle because it was so close to the length limit. :)

[JohannesKonings]

you can add an @ if your twitter handle is less than 15 characters. My twitter handle + @ has 16 characters, which caused the error. If I get it right :)

[CBasis]

@JohannesKonings < Yes, after second reading I got it. :)

Now I am thinking about how to avoid this error in future:

Option A) Keep on allowing both entries (with or without the "@") to be entered and keep on saving that in the persistence layer ... like today
.. then we need to enlarge the database field to length 16 to handle the 15char twitternames.
=> Pro: No need to change the application logic
=> Pro: All existing data is still valid
=> Cons: We will keep on having a mix in the list with both options, but this has no functional impact, because twitter url handles both formats correctly.

Option B) Remove the @ in case the entered twitter handle is 16chars long
if (str.length > 15 && str.indexOf("@") > -1 )
Seems to be a bit dirty to me.
because it ends up in saving both formats to the database.

Option C) Silently remove the "@" in case it was entered before saving it in the database ...
=> Pro: No need to force the user to enter it the correct way
=> Pro: No need to change the table column length
=> Pro: Clean data in the table from that point of time .. better for later analytics on the twitter data
=> Con: changes in the sourcecode needed if (str.indexOf("@") > -1 )

My favorite is option is "C".
Do you seen any other Pros/Cons, or another option .. or do you have a favorite?

[gregorwolf]

As a first easy fix I limit the field length to 15 and add the information that the username should be entered without @