from registrasion.models import inventory

from .category import CategoryController

from .discount import DiscountController

from .flag import FlagController

from .product import ProductController

            )

        return cls(existing)

    # Marks the carts that are currently in batches

    _FOR_USER = {}

    _BATCH_COUNT = collections.defaultdict(int)

        '''

        self.cart.refresh_from_db()

        self._recalculate_discounts()

        # Test each category limit here

        for category in by_cat:

            limit = with_remainders[category].remainder

            # Get the amount so far in the cart

        return set(i.category for i in available)

    @classmethod

    def attach_user_remainders(cls, user, categories):

        '''

from django.db.models import Case

from django.db.models import F, Q

from django.db.models import Sum

from registrasion.models import commerce

from registrasion.models import conditions

_BIG_QUANTITY = 99999999  # A big quantity

            if hasattr(self.condition, "remainder"):

                return self.condition.remainder

        # Mark self.condition with a remainder

        qs = type(self.condition).objects.filter(pk=self.condition.id)

        qs = self.pre_filter(qs, user)

class TimeOrStockLimitConditionController(

    ''' Common condition tests for TimeOrStockLimit Flag and

    Discount.'''

        categories and products. The discounts also list the available quantity

        for this user, not including products that are pending purchase. '''

        filtered_clauses = cls._filtered_discounts(user, categories, products)

        discounts = []

        categories = set(product.category for product in all_products)

        r = CategoryController.attach_user_remainders(user, categories)

        r = ProductController.attach_user_remainders(user, all_products)

        passed_limits = set(

            product

        return out

    @classmethod

    def attach_user_remainders(cls, user, products):

        '''

    '''

        Q(productitem__cart__user=context.request.user) &

        Q(productitem__cart__status=commerce.Cart.STATUS_PAID)

    )

        id__in=pks,

    ).select_related("category")

    product_quantities = [

        (product, id_to_quantity[product.id]) for product in products

    ]