I am using QGIS 3.4.
I want to make attribute tables with many calculated fields that link to styles, and reuse the same structure for many projects.
For example, when I draw a pipe (line vector), and enter attributes like diameter and flow, these should calculate a range of derived values that affect how the style is presented on the map.
In a new project when I make a new geopackage layer and apply the "Irrigation Pipe" style, how can I make sure the field calculations are in the table and auto-generated?
I could make a function for each type of field calculation, but would I have to manually load the functions to each field every time I made a new attribute table?
QGIS novice here, it's been 20 years since I did lots of GIS!