So this morning I was trying to write to a date & time field on a button click on the new responsive forms designer. I clicked on the button settings > Advanced > Connected To but in my list of columns, my Date & Time column wasn't there. It appears that only the text based columns can be written to here. This was frustrating, especially as you can write the date and time to a text column using the common references.
Ah-ha, I wonder? Let's see.
That light bulb moment you just witnessed was me thinking, if I set the button to write to a Single Line of Text (SLOT) using the "Current Time" reference, I get myself a date and time, that's fine, but no good for reporting really, I want my datatype to be Date and time, not just a string containing the date and time. Nevertheless, I published the form and knowing that my button was configured how I wanted it to be, then in my list, head to the List Settings, head to the SLOT column settings for the column I've just connected my button to and in these settings I can switch the data type from SLOT to Date and Time.
Now here comes the test, firstly, is my form still configured? Head back to the form designer and check my button settings, all the configs are still there...great.
Now create a new item in my list and hit that button and Bingo! Date and time written to a date and time column, even though the form designer didn't really want me to. Perfect.
I'm guessing that Nintex didn't want people to be able to write to date and time columns because they might be prone to putting something other than the date and time in here and values will be lost, but as they give us a reference, it still seems odd to me.
Anyway, this relatively simple fix means you can write to a datatype using certain actions that you might not have thought you could.
I wonder whether the same might work with a Choice column (you could allow Fill In choices for flexibility perhaps)?