How to recreate a sequential field value using ObjectID value

[AndrewAidt2]

I am trying to get an empty unique ID field populated. The field is CarteID. I want a prefix of SSP and use the ObjectID field. Example: ObjectID is 10234 - I want the CarteID to be SSP10234. Using Python 3, how do I use the field calculator to populate this field. What Expression do I use?

Then, going forward, is there a way to automatically populate this field when someone adds a new feature?

Thank you!

[Anonymous User]

The following should work in python:

"SSP" + !OBJECTID! 

As for automatically populating the field moving forward I would suggest an attribute rule.  Something like this should do the trick. The Insert Trigger ensures that the field is only calculated when a new feature is created.

[AndrewAidt2]

I am new to Python. How do I put this in the field calculator? What expression do I use? When I put 

"SSP" + !OBJECTID! 

in the Code Block I get an error: 2 parameters are missing or invalid.

Thanks!

[Anonymous User]

Are you using arcmap or arcgis pro? Either way, when you open the attribute table right click on the field name (CarteID) click calculate field/Field Calculator and paste in the code. Make sure that the expression type/parser is python.

[AndrewAidt2]

I am using Pro. I pasted the code and I get the error I mentioned above.

[RhettZufelt]

[AndrewAidt2]

[RhettZufelt]

Working fine in 2.9.3 and 3.1.1.

It appears as if it doesn't like the first double quote in your syntax for some reason (perhaps copy/pasted in windoze).  Try replacing or just use single quotes, they work as well.

R_

[AndrewAidt2]

What is the blue 1 you have at the beginning? I don't get that.

[AndrewAidt2]

Mine is black...