Update doc on hooks before_save

[gmbelart]

Hi, how I can update some doc using hooks? I have create a custom field on Salary Slip, and I want to fill that field using doc_events on hook.

I already tried

doc_events = {
    "Salary Slip": {
        "before_save": "attendance_manager.salary_slip.before_save"
    }
}

and the method is

def before_save(doc, method):
    doc.custom_field = "value"

but it not working

I already tried with on_update event and call doc.save() but it ended infinity loop

any suggestion?

thanks

[gmbelart]

I found the solution. I need to return the doc.

def before_save(doc, method):
    doc.custom_field = "value"
    return doc

and I use before_validate instead of before_save

[Akram_Mutaher]

Can you tell me what is the value that you send to salary slip field

because I want to get total absent days for employee from attendance table to salary slip

Calculate Absent days on salary slip doctype

I need to use total absence days in the salary slip like Working Days, Leave Without Pay, Payment Days fields I have to create a field called Absent Days i need a custom script to fetch total absent days Depending on Employee Name, Start Date, End Date fields in Salary Slip doctype like the total absence in Monthly Attendance Sheet report After that, I can use it in Salary Component formula any ideas here?