07-21-2022 04:23 PM
I have the below req.
i want to update the value of a column only if it’s null else leave as it is.
ex: raw_table.date_joined will be populated only if it’s null, if it’s already have a value leave it.
mapper:
expression Target
Date.Now() $date==null||Date.Now():$date
how to do this.
07-22-2022 02:22 AM
Hi @karthik_dhina,
You can do this by using the ternary operator. Check this out:
$date == null ? Date.now() : $date
This translated means, get me the ‘date’ field, but if it’s null, than get the current datetime. If you want to add current datetime even if the field doesn’t exist, than try the following:
$.get('date') == null ? Date.now() : $date
BR,
Bojan
07-22-2022 06:12 AM
@karthik_dhina: The solution has been provided by @bojanvelevski - trust me it works. If at all you do not want to use a mapper then you can always leverage some snaps like filter
and router
for the same but you’ll have to use a mapper after the results are filtered and assign the default value.
Alternatively, you can also use Conditional
snap to achieve similar use cases.