get_object_or_none.py

 
def get_object_or_none(klass, *args, **kwargs):
    if isinstance(klass, Manager):
        manager = klass
        klass = manager.model
    else:
        manager = klass._default_manager

    try:
        return manager.get(*args, **kwargs)
    except klass.DoesNotExist:
        return None

def get_object_or_none(klass, *args, **kwargs):
    """
    Uses get() to return an object or None if the object does not exist.

    klass may be a Model, Manager, or QuerySet object. All other passed
    arguments and keyword arguments are used in the get() query.

    Note: Like with get(), an MultipleObjectsReturned will be raised if more than one
    object is found.
    """
    queryset = _get_queryset(klass)
    try:
        return queryset.get(*args, **kwargs)
    except queryset.model.DoesNotExist:
        return None