I’m developing a scheduling system. I placed the fields “scheduling date and time” (with the date type), “Duration” (with the duration type) and “end of scheduling” (with the formula type). I want it to be possible for the user to select the available date and time, and for an agenda to be created, avoiding duplication of times. When adding the formula: date_field("Scheduling Date and Time") + duration_field("Duration") the text box returns the error: Error with formula: data_field is not a valid function. How to solve?
Hi,
Welcome to the community 
In Baserow formulas, you don’t need to refer to the type of the field. So, you don’t need date_field and duration_field.
I’ve created the following table to simulate the problem:
The formula in End of scheduling is field('Scheduling date and time') + field('Duration').
So, you can refer to each field with field('name_of_the_field')