Automatic calculation of field value

[Naz]

I'm working on a page set up by someone else, someone who isn't part of the project anymore. Recently some data inconsistencies have appeared in one field, and I'm trying to find out what causes them. Problem is: I have no idea how the field is populated with data. So maybe some of the clever and helpful people in this forum can give me a pointer where to look.

I have a template called "book" whose grandchild is at least one page with the template "date". Each date has a field "start" and a field "end". Several dates can be associated with one book, which is why the template "book" has the fields "earliest date" and "latest date" to identify the whole date range associated with one book. The values of "earliest date" and "latest date" are automatically populated with respectively the earliest "start" and the latest "end" field of all its grandchildren.

I tried figuring out where this happens and I have no clue at all. It doesn't happen in the "book" template, nor anywhere in the code (as far as I can see - I looked at all uses of the field names and only saw its value printed out, but not set anywhere). I can't see any setting in the admin that would cause this relationship between the fields. Nor did I find a module that causes it. The FieldType of all fields involved is "integer". Does anyone have an idea where I could start looking?

[Zeka]

Hi @Naz

Possibly it's done via hooks or with a custom module.

Try to look in these files

site/init.php
site/ready.php
site/finished.php

 

[Naz]

@Zeka Thanks! For some reason my IDE hadn't downloaded the standalone module files in the modules folder, but only its subfolders. A thorough search for the files you listed led me to the custom module responsible for creating the field data.