Python – Django: change the value of a field for all objects in a queryset

djangodjango-querysetpython

I have a model MyModel with a boolean field active

Elsewhere, I am retrieving a queryset:

qs = MyModel.Objects.filter(....)

how can I set active=False for all objects in this qs?

You can update all the records in the queryset with

qs.update(active=False)

Please refer to the official Django documentation for more info

Assuming module foo with method bar:

import foo
method_to_call = getattr(foo, 'bar')
result = method_to_call()

You could shorten lines 2 and 3 to:

result = getattr(foo, 'bar')()

if that makes more sense for your use case.

You can use getattr in this fashion on class instance bound methods, module-level methods, class methods... the list goes on.

The sorted() function takes a key= parameter

newlist = sorted(list_to_be_sorted, key=lambda d: d['name'])

Alternatively, you can use operator.itemgetter instead of defining the function yourself

from operator import itemgetter
newlist = sorted(list_to_be_sorted, key=itemgetter('name'))

For completeness, add reverse=True to sort in descending order

newlist = sorted(list_to_be_sorted, key=itemgetter('name'), reverse=True)