449 lines
16 KiB
Python
449 lines
16 KiB
Python
# This file is part of Tryton. The COPYRIGHT file at the top level of
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# this repository contains the full copyright notices and license terms.
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import datetime
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import functools
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from decimal import Decimal
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from collections import defaultdict
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from sql import Literal, Null
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from sql.aggregate import Max
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from sql.functions import CurrentTimestamp
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from sql.conditionals import Coalesce
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from trytond.model import ModelSQL, ModelView, fields
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from trytond.wizard import Wizard, StateTransition
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from trytond.pyson import Eval, Or
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from trytond.transaction import Transaction
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from trytond.pool import Pool, PoolMeta
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from trytond.tools import grouped_slice
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from trytond.modules.product import TemplateFunction
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from .move import StockMixin
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__all__ = ['Template', 'Product',
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'ProductByLocationContext',
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'ProductQuantitiesByWarehouse', 'ProductQuantitiesByWarehouseContext',
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'RecomputeCostPrice']
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def check_no_move(func):
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def find_moves(cls, records):
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pool = Pool()
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Move = pool.get('stock.move')
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if cls.__name__ == 'product.template':
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field = 'product.template'
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else:
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field = 'product'
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for sub_records in grouped_slice(records):
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moves = Move.search([
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(field, 'in', list(map(int, sub_records))),
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],
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limit=1, order=[])
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if moves:
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return True
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return False
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@functools.wraps(func)
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def decorator(cls, *args):
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pool = Pool()
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Template = pool.get('product.template')
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transaction = Transaction()
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if (transaction.user != 0
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and transaction.context.get('_check_access')):
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actions = iter(args)
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for records, values in zip(actions, actions):
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for field, error in Template._modify_no_move:
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if field in values:
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if find_moves(cls, records):
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Template.raise_user_error(error)
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# No moves for those records
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break
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func(cls, *args)
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return decorator
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class Template(metaclass=PoolMeta):
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__name__ = "product.template"
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quantity = fields.Function(fields.Float('Quantity'), 'sum_product')
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forecast_quantity = fields.Function(fields.Float('Forecast Quantity'),
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'sum_product')
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cost_value = fields.Function(fields.Numeric('Cost Value'),
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'sum_product')
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def sum_product(self, name):
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if name not in ('quantity', 'forecast_quantity', 'cost_value'):
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raise Exception('Bad argument')
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sum_ = 0. if name != 'cost_value' else Decimal(0)
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for product in self.products:
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sum_ += getattr(product, name)
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return sum_
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@classmethod
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def __setup__(cls):
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super(Template, cls).__setup__()
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cls._error_messages.update({
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'change_default_uom': ('You cannot change the default uom for '
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'a product which is associated to stock moves.'),
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'change_type': ('You cannot change the type for a product '
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'which is associated to stock moves.'),
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})
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cls.cost_price.states['required'] = Or(
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cls.cost_price.states.get('required', True),
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Eval('type').in_(['goods', 'assets']))
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cls.cost_price.depends.append('type')
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cls._modify_no_move = [
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('default_uom', 'change_default_uom'),
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('type', 'change_type'),
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]
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@classmethod
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@check_no_move
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def write(cls, *args):
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super(Template, cls).write(*args)
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@classmethod
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def recompute_cost_price(cls, templates):
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pool = Pool()
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Product = pool.get('product.product')
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products = [p for t in templates for p in t.products]
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Product.recompute_cost_price(products)
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class Product(StockMixin, object, metaclass=PoolMeta):
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__name__ = "product.product"
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quantity = fields.Function(fields.Float('Quantity'), 'get_quantity',
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searcher='search_quantity')
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forecast_quantity = fields.Function(fields.Float('Forecast Quantity'),
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'get_quantity', searcher='search_quantity')
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cost_value = fields.Function(fields.Numeric('Cost Value'),
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'get_cost_value')
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@classmethod
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def get_quantity(cls, products, name):
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location_ids = Transaction().context.get('locations')
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product_ids = list(map(int, products))
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return cls._get_quantity(
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products, name, location_ids, grouping_filter=(product_ids,))
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@classmethod
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def search_quantity(cls, name, domain=None):
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location_ids = Transaction().context.get('locations')
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return cls._search_quantity(name, location_ids, domain)
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@classmethod
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def get_cost_value(cls, products, name):
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cost_values = {p.id: None for p in products}
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context = {}
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trans_context = Transaction().context
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if trans_context.get('stock_date_end'):
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# Use the last cost_price of the day
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context['_datetime'] = datetime.datetime.combine(
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trans_context['stock_date_end'], datetime.time.max)
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# The date could be before the product creation
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products = [p for p in products
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if p.create_date <= context['_datetime']]
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with Transaction().set_context(context):
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for product in cls.browse(products):
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# The product may not have a cost price
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if product.cost_price is not None:
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cost_values[product.id] = (
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Decimal(str(product.quantity)) * product.cost_price)
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return cost_values
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@classmethod
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@check_no_move
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def write(cls, *args):
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super(Product, cls).write(*args)
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@classmethod
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def products_by_location(cls, location_ids,
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with_childs=False, grouping=('product',), grouping_filter=None):
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"""
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Compute for each location and product the stock quantity in the default
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uom of the product.
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The context with keys:
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stock_skip_warehouse: if set, quantities on a warehouse are no more
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quantities of all child locations but quantities of the storage
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zone.
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Return a dictionary with location id and grouping as key
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and quantity as value.
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"""
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pool = Pool()
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Location = pool.get('stock.location')
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Move = pool.get('stock.move')
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# Skip warehouse location in favor of their storage location
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# to compute quantities. Keep track of which ids to remove
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# and to add after the query.
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storage_to_remove = set()
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wh_to_add = {}
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if Transaction().context.get('stock_skip_warehouse'):
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location_ids = set(location_ids)
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for location in Location.browse(list(location_ids)):
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if location.type == 'warehouse':
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location_ids.remove(location.id)
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if location.storage_location.id not in location_ids:
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storage_to_remove.add(location.storage_location.id)
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location_ids.add(location.storage_location.id)
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wh_to_add[location.id] = location.storage_location.id
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location_ids = list(location_ids)
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query = Move.compute_quantities_query(location_ids, with_childs,
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grouping=grouping, grouping_filter=grouping_filter)
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if query is None:
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return {}
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quantities = Move.compute_quantities(query, location_ids, with_childs,
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grouping=grouping, grouping_filter=grouping_filter)
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if wh_to_add:
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for wh, storage in wh_to_add.items():
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for key in quantities:
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if key[0] == storage:
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quantities[(wh,) + key[1:]] = quantities[key]
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if storage in storage_to_remove:
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del quantities[key]
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return quantities
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@classmethod
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def recompute_cost_price(cls, products):
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digits = cls.cost_price.digits
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costs = defaultdict(list)
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for product in products:
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if product.type == 'service':
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continue
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cost = getattr(product,
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'recompute_cost_price_%s' % product.cost_price_method)()
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cost = cost.quantize(Decimal(str(10.0 ** -digits[1])))
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costs[cost].append(product)
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if not costs:
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return
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to_write = []
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for cost, records in costs.items():
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to_write.append(records)
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to_write.append({'cost_price': cost})
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# Enforce check access for account_stock*
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with Transaction().set_context(_check_access=True):
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cls.write(*to_write)
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def recompute_cost_price_fixed(self):
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return self.cost_price
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def recompute_cost_price_average(self):
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pool = Pool()
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Move = pool.get('stock.move')
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Currency = pool.get('currency.currency')
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Uom = pool.get('product.uom')
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context = Transaction().context
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if not isinstance(self.__class__.cost_price, TemplateFunction):
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product_clause = ('product', '=', self.id)
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else:
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product_clause = ('product.template', '=', self.template.id)
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moves = Move.search([
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product_clause,
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('state', '=', 'done'),
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('company', '=', context.get('company')),
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['OR',
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[
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('to_location.type', '=', 'storage'),
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('from_location.type', '!=', 'storage'),
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],
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[
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('from_location.type', '=', 'storage'),
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('to_location.type', '!=', 'storage'),
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],
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],
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], order=[('effective_date', 'ASC'), ('id', 'ASC')])
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cost_price = Decimal(0)
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quantity = 0
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for move in moves:
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qty = Uom.compute_qty(move.uom, move.quantity, self.default_uom)
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qty = Decimal(str(qty))
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if move.from_location.type == 'storage':
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qty *= -1
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if (move.from_location.type in ['supplier', 'production']
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or move.to_location.type == 'supplier'):
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with Transaction().set_context(date=move.effective_date):
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unit_price = Currency.compute(
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move.currency, move.unit_price,
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move.company.currency, round=False)
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unit_price = Uom.compute_price(move.uom, unit_price,
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self.default_uom)
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if quantity + qty > 0 and quantity >= 0:
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cost_price = (
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(cost_price * quantity) + (unit_price * qty)
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) / (quantity + qty)
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elif qty > 0:
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cost_price = unit_price
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quantity += qty
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return cost_price
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class ProductByLocationContext(ModelView):
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'Product by Location'
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__name__ = 'product.by_location.context'
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forecast_date = fields.Date(
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'At Date', help=('Allow to compute expected '
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'stock quantities for this date.\n'
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'* An empty value is an infinite date in the future.\n'
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'* A date in the past will provide historical values.'))
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stock_date_end = fields.Function(fields.Date('At Date'),
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'on_change_with_stock_date_end')
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@staticmethod
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def default_forecast_date():
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Date = Pool().get('ir.date')
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return Date.today()
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@fields.depends('forecast_date')
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def on_change_with_stock_date_end(self, name=None):
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if self.forecast_date is None:
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return datetime.date.max
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return self.forecast_date
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class ProductQuantitiesByWarehouse(ModelSQL, ModelView):
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'Product Quantities By Warehouse'
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__name__ = 'stock.product_quantities_warehouse'
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date = fields.Date('Date')
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quantity = fields.Function(fields.Float('Quantity'), 'get_quantity')
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@classmethod
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def __setup__(cls):
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super(ProductQuantitiesByWarehouse, cls).__setup__()
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cls._order.insert(0, ('date', 'ASC'))
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@staticmethod
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def table_query():
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pool = Pool()
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Move = pool.get('stock.move')
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Location = pool.get('stock.location')
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Product = pool.get('product.product')
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move = from_ = Move.__table__()
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context = Transaction().context
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if context.get('product_template') is not None:
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product = Product.__table__()
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from_ = move.join(product, condition=move.product == product.id)
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product_clause = (
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product.template == context['product_template'])
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else:
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product_clause = move.product == context.get('product', -1)
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warehouse_id = context.get('warehouse', -1)
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warehouse_query = Location.search([
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('parent', 'child_of', [warehouse_id]),
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], query=True, order=[])
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date_column = Coalesce(move.effective_date, move.planned_date
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).as_('date')
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return from_.select(
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Max(move.id).as_('id'),
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Literal(0).as_('create_uid'),
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CurrentTimestamp().as_('create_date'),
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Literal(None).as_('write_uid'),
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Literal(None).as_('write_date'),
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date_column,
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where=product_clause
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& (move.from_location.in_(warehouse_query)
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| move.to_location.in_(warehouse_query))
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& (Coalesce(move.effective_date, move.planned_date) != Null),
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group_by=(date_column, move.product))
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@classmethod
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def get_quantity(cls, lines, name):
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Product = Pool().get('product.product')
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trans_context = Transaction().context
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def valid_context(name):
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return (trans_context.get(name) is not None
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and isinstance(trans_context[name], int))
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if not any(map(valid_context, ['product', 'product_template'])):
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return {l.id: None for l in lines}
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if trans_context.get('product') is not None:
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grouping = ('product',)
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grouping_filter = ([trans_context['product']],)
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key = trans_context['product']
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else:
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grouping = ('product.template',)
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grouping_filter = ([trans_context.get('product_template')],)
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key = trans_context['product_template']
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warehouse_id = trans_context.get('warehouse')
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dates = sorted(l.date for l in lines)
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quantities = {}
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date_start = None
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for date in dates:
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context = {
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'stock_date_start': date_start,
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'stock_date_end': date,
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'forecast': True,
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}
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with Transaction().set_context(**context):
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quantities[date] = Product.products_by_location(
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[warehouse_id],
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grouping=grouping,
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grouping_filter=grouping_filter,
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with_childs=True).get((warehouse_id, key), 0)
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try:
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date_start = date + datetime.timedelta(1)
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except OverflowError:
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pass
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cumulate = 0
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for date in dates:
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cumulate += quantities[date]
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quantities[date] = cumulate
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return dict((l.id, quantities[l.date]) for l in lines)
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class ProductQuantitiesByWarehouseContext(ModelView):
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'Product Quantities By Warehouse'
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__name__ = 'stock.product_quantities_warehouse.context'
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warehouse = fields.Many2One('stock.location', 'Warehouse', required=True,
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domain=[
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('type', '=', 'warehouse'),
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])
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@staticmethod
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def default_warehouse():
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Location = Pool().get('stock.location')
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warehouses = Location.search([
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('type', '=', 'warehouse'),
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])
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if len(warehouses) == 1:
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return warehouses[0].id
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class RecomputeCostPrice(Wizard):
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'Recompute Cost Price'
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__name__ = 'product.recompute_cost_price'
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start_state = 'recompute'
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recompute = StateTransition()
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def transition_recompute(self):
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pool = Pool()
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Product = pool.get('product.product')
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Template = pool.get('product.template')
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context = Transaction().context
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if context['active_model'] == 'product.product':
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products = Product.browse(context['active_ids'])
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Product.recompute_cost_price(products)
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elif context['active_model'] == 'product.template':
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templates = Template.browse(context['active_ids'])
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Template.recompute_cost_price(templates)
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return 'end'
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