from django.core.exceptions import MultipleObjectsReturned \
    as MultipleObjectsReturnedException

def __noop(self, *args, **kwargs):
    """Just a dumb no-op function to make code a bit more DRY"""
    return None

def __noop_list(self, *args, **kwargs):
    return []

def __noop_dict(self, *args, **kwargs):
    return {}

def __noop_2tup(self, *args, **kwargs):
    return (Null, Null)

def __noop_manager(self, *args, **kwargs):
    return _inst_manager

def __noop_queryset(self, *args, **kwargs):
    return _inst_queryset

# Instantiate for (slight) efficiency
_inst_manager = Manager()
_inst_queryset = QuerySet()

class Model(object):
    _meta = None
    objects = _inst_manager
    id = None
    pk = None
    MultipleObjectsReturned = MultipleObjectsReturnedException
    save = __noop
    delete = __noop
    clean = __noop

class Manager(object):
    """
    Eliminate E1002 for Manager object
    """
    get_queryset = __noop_queryset
    # QuerySet API as of Django 1.11
    filter = __noop_queryset
    exclude = __noop_queryset
    annotate = __noop_queryset
    order_by = __noop_queryset
    reverse = __noop_queryset
    distinct = __noop_queryset
    values = __noop_queryset
    values_list = __noop_queryset
    none = __noop_queryset
    all = __noop_queryset
    dates = __noop_queryset
    datetimes= __noop_queryset
    none = __noop_queryset
    all = __noop_queryset
    union = __noop_queryset
    intersection = __noop_queryset
    difference = __noop_queryset
    select_related = __noop_queryset
    prefetch_related = __noop_queryset
    extra = __noop_queryset
    defer = __noop_queryset
    only = __noop_queryset
    using = __noop_queryset
    select_for_update = __noop_queryset
    raw = __noop_queryset
    aggregate = __noop_dict
    get_or_create = __noop_2tup
    update_or_create = __noop_2tup
    get = __noop
    create = __noop
    bulk_create = __noop
    count = __noop
    in_bulk = __noop
    iterator = __noop
    latest = __noop
    earliest = __noop
    first = __noop
    last = __noop
    exists = __noop
    update = __noop
    delete = __noop

class QuerySet(Manager, list):
    # Should have all the manager methods and also quack like a list
    as_manager = __noop_manager