Answers for "created and updated in django model"

create or update django models

obj, created = Person.objects.update_or_create(
    first_name='John', last_name='Lennon',
    defaults={'first_name': 'Bob'},
)
# If person exists with first_name='John' & last_name='Lennon' then update first_name='Bob'
# Else create new person with first_name='Bob' & last_name='Lennon'