create_obj.py

import json
import datetime
from random import randint

from django.contrib.auth.models import User
from employees.models import EmployeeGrade

def create_obj():
    objects = User.objects.filter()
    for o in objects:
        year = randint(2014, 2017)
        month = randint(1, 11)
        day = randint(1, 28)
        EmployeeGrade.objects.create(
            employee = o,
            grade = randint(1, 15),
            g_start_date = datetime.date(year=year, month=month, day=day),
        )

create_obj()