Maybe someone can help me, I have 2 pie charts and I've selected the decimal places to be 0, but everytime that I need to open it again, it shows 2 decimals and I need to go back and change to 0 again.
Did anyone face this before?
Indeed what you face is by design.
To achieve your requirement, just select the column and set "decimal place:0" in the Modeling bar.
I would like explain more about why your are suffering from this problem.
when your value is set "data type:decimal number", "formatercentage" and "decimal place:2" in the "Modeling" bar,
to make the decimal places to be 0
you select on pie visual, then go to the "format"->"detail labels", set the decimal places to be 0,
But this just change decimal places for this pie visual instead of others's.
To make all chart show 0 decimals automatically after one change, just select the column and set "decimal place:0" in the Modeling bar.
I'm unable to change the column on modeling to a decimal number because it's pure text, so it gives me an error.
From your screenshot, it seems this column contains text and decimal number like "text 12.3".
If it is formed from a text type column and a number type column from your table, just modify this number type column to "decimal number" before connecting.