How can I set a NULL value with window.handleItemChange?

RE: How can I set a NULL value with window.handleItemChange?

AngelaIp — Thu, 31 Jan 2019 15:16:25 GMT

Good to know! Thanks for checking!

RE: How can I set a NULL value with window.handleItemChange?

Christopher Gillis — Thu, 31 Jan 2019 14:55:27 GMT

Ah! I was testing with an item field yesterday. I can confirm that in my 11.0 SP15 environment, using handleItemChange on a text field did not set the value back to null in the database. I checked our records, and it seems like this is filed to be changed but is not yet scheduled for a specific release.

RE: How can I set a NULL value with window.handleItemChange?

AngelaIp — Thu, 31 Jan 2019 14:42:37 GMT

I didn´t assue that this little issue would become so interesting.
There is nothing wrong with window.handleItemChange.

What I have seen yesterday seems to be some kind of regular text field behaviour, at least in my Innovator 11SP11.
Once a text field contains a value, it can never be reset to zero. It can only be reset to an empty string.

Steps to reproduce:
1. Open an Item that contains a Form with regular fields
2. Add a value into one of the string fields (e.g. name) and save the item
3. Now delete the value from the text field and save again -> empty string instead of NULL will be set!

This is no problem for my current use case, just was suprised about this behaviour.

RE: How can I set a NULL value with window.handleItemChange?

AngelaIp — Thu, 31 Jan 2019 13:50:02 GMT

Hi Chris,

Thanks for testing! I was pretty sure it did not work yesterday. Absolutly sure. But now it suddenly works also with my Innovator 11 SP11. The problem was probably my overengineered 'if' query, that I do not need at all. I like these mysterious problems that resolve themselves overnight.

RE: How can I set a NULL value with window.handleItemChange?

Christopher Gillis — Wed, 30 Jan 2019 15:24:51 GMT

Hi Angela,

Could you confirm which version of Innovator you are using? I just ran a quick test in an 11.0 SP15 instance I have set up, and it seems that using handleItemChange with an empty string will set the value in the database to null in this version.

Chris