We are using the field mapping application QField with QGIS 2.18 for on-site data collection.
I've looked through the documentation and am still unsure, so am bring this question here: Is it possible to use python scripts using the python init function specification in the layer field properties?
I currently use a script to automatically assign object modification date and time. I am looking use this, because as far as I can tell, the now() function only works when the object is created. Updating existing points does not update the now() variable.