690 lines
26 KiB
Python
690 lines
26 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 operator
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from itertools import groupby
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from functools import partial
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from decimal import Decimal
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from trytond.model import ModelView, ModelSQL, fields
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from trytond.wizard import Wizard, StateView, StateAction, StateTransition, \
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Button
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from trytond.pyson import If, In, Eval, Get
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from trytond.transaction import Transaction
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from trytond.pool import Pool
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__all__ = ['PurchaseRequest',
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'CreatePurchaseRequestStart', 'CreatePurchaseRequest',
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'CreatePurchaseAskTerm', 'CreatePurchaseAskParty', 'CreatePurchase']
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STATES = {
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'readonly': Eval('state') != 'draft',
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}
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DEPENDS = ['state']
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class PurchaseRequest(ModelSQL, ModelView):
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'Purchase Request'
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__name__ = 'purchase.request'
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product = fields.Many2One('product.product', 'Product', required=True,
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select=True, readonly=True, domain=[('purchasable', '=', True)])
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party = fields.Many2One('party.party', 'Party', select=True, states=STATES,
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depends=DEPENDS)
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quantity = fields.Float('Quantity', required=True, states=STATES,
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depends=DEPENDS)
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uom = fields.Many2One('product.uom', 'UOM', required=True, select=True,
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states=STATES, depends=DEPENDS)
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computed_quantity = fields.Float('Computed Quantity', readonly=True)
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computed_uom = fields.Many2One('product.uom', 'Computed UOM',
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readonly=True)
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purchase_date = fields.Date('Best Purchase Date', readonly=True)
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supply_date = fields.Date('Expected Supply Date', readonly=True)
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stock_level = fields.Float('Stock at Supply Date', readonly=True)
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warehouse = fields.Many2One(
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'stock.location', "Warehouse",
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states={
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'required': Eval('warehouse_required', False),
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},
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domain=[('type', '=', 'warehouse')], depends=['warehouse_required'],
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readonly=True)
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warehouse_required = fields.Function(fields.Boolean('Warehouse Required'),
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'get_warehouse_required')
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purchase_line = fields.Many2One('purchase.line', 'Purchase Line',
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readonly=True)
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purchase = fields.Function(fields.Many2One('purchase.purchase',
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'Purchase'), 'get_purchase')
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company = fields.Many2One('company.company', 'Company', required=True,
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readonly=True, domain=[
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('id', If(In('company', Eval('context', {})), '=', '!='),
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Get(Eval('context', {}), 'company', 0)),
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])
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origin = fields.Reference('Origin', selection='origin_get', readonly=True,
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required=True)
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state = fields.Function(fields.Selection([
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('purchased', 'Purchased'),
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('done', 'Done'),
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('draft', 'Draft'),
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('cancel', 'Cancel'),
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], 'State'), 'get_state')
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@classmethod
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def __setup__(cls):
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super(PurchaseRequest, cls).__setup__()
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cls._order[0] = ('id', 'DESC')
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cls._error_messages.update({
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'create_request': ('Purchase requests are only created '
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'by the system.'),
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})
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cls._sql_constraints += [
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('check_purchase_request_quantity', 'CHECK(quantity > 0)',
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'The requested quantity must be greater than 0'),
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]
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@classmethod
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def __register__(cls, module_name):
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cursor = Transaction().cursor
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super(PurchaseRequest, cls).__register__(module_name)
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# Migration from 2.0: empty order point origin is -1 instead of 0
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cursor.execute('UPDATE "%s" '
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'SET origin = %%s WHERE origin = %%s' % cls._table,
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('stock.order_point,-1', 'stock.order_point,0'))
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def get_rec_name(self, name):
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if self.warehouse:
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return "%s@%s" % (self.product.name, self.warehouse.name)
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else:
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return self.product.name
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@classmethod
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def search_rec_name(cls, name, clause):
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res = []
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names = clause[2].split('@', 1)
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res.append(('product.template.name', clause[1], names[0]))
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if len(names) != 1 and names[1]:
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res.append(('warehouse', clause[1], names[1]))
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return res
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@staticmethod
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def default_company():
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return Transaction().context.get('company')
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def get_purchase(self, name):
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if self.purchase_line:
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return self.purchase_line.purchase.id
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def get_state(self, name):
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if self.purchase_line:
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if self.purchase_line.purchase.state == 'cancel':
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return 'cancel'
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elif self.purchase_line.purchase.state == 'done':
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return 'done'
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else:
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return 'purchased'
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return 'draft'
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def get_warehouse_required(self, name):
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return self.product.type in ('goods', 'assets')
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@staticmethod
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def origin_get():
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Model = Pool().get('ir.model')
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res = []
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models = Model.search([
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('model', '=', 'stock.order_point'),
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])
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for model in models:
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res.append([model.model, model.name])
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return res
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@classmethod
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def generate_requests(cls, products=None):
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"""
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For each product compute the purchase request that must be
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create today to meet product outputs.
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"""
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pool = Pool()
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OrderPoint = pool.get('stock.order_point')
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Product = pool.get('product.product')
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Location = pool.get('stock.location')
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User = pool.get('res.user')
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company = User(Transaction().user).company
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# fetch warehouses:
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warehouses = Location.search([
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('type', '=', 'warehouse'),
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])
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warehouse_ids = [w.id for w in warehouses]
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# fetch order points
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order_points = OrderPoint.search([
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('type', '=', 'purchase'),
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])
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# index them by product
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product2ops = {}
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for order_point in order_points:
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product2ops[
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(order_point.warehouse_location.id, order_point.product.id)
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] = order_point
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if products is None:
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# fetch goods and assets
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# ordered by ids to speedup reduce_ids in products_by_location
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products = Product.search([
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('type', 'in', ['goods', 'assets']),
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('consumable', '=', False),
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('purchasable', '=', True),
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], order=[('id', 'ASC')])
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product_ids = [p.id for p in products]
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#aggregate product by minimum supply date
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date2products = {}
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for product in products:
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min_date, max_date = cls.get_supply_dates(product)
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date2products.setdefault((min_date, max_date), []).append(product)
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# compute requests
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new_requests = []
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cursor = Transaction().cursor
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for dates, products in date2products.iteritems():
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min_date, max_date = dates
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for i in range(0, len(products), cursor.IN_MAX):
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product_ids = [p.id for p in products[i:i + cursor.IN_MAX]]
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with Transaction().set_context(forecast=True,
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stock_date_end=min_date or datetime.date.max):
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pbl = Product.products_by_location(warehouse_ids,
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product_ids, with_childs=True, skip_zero=False)
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for warehouse_id in warehouse_ids:
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min_date_qties = dict((x, pbl.pop((warehouse_id, x)))
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for x in product_ids)
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# Search for shortage between min-max
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shortages = cls.get_shortage(warehouse_id, product_ids,
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min_date, max_date, min_date_qties=min_date_qties,
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order_points=product2ops)
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for product in products[i:i + cursor.IN_MAX]:
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shortage_date, product_quantity = shortages[product.id]
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if shortage_date is None or product_quantity is None:
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continue
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order_point = product2ops.get(
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(warehouse_id, product.id))
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# generate request values
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request = cls.compute_request(product,
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warehouse_id, shortage_date, product_quantity,
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company, order_point)
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new_requests.append(request)
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# delete purchase requests without a purchase line
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products = set(products)
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reqs = cls.search([
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('purchase_line', '=', None),
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('origin', 'like', 'stock.order_point,%'),
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])
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reqs = [r for r in reqs if r.product in products]
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cls.delete(reqs)
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new_requests = cls.compare_requests(new_requests)
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cls.create_requests(new_requests)
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@classmethod
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def create_requests(cls, new_requests):
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for new_req in new_requests:
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if new_req.supply_date == datetime.date.max:
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new_req.supply_date = None
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if new_req.quantity > 0.0:
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new_req.save()
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@classmethod
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def compare_requests(cls, new_requests):
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"""
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Compare new_requests with already existing request to avoid
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to re-create existing requests.
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"""
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pool = Pool()
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Uom = pool.get('product.uom')
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Request = pool.get('purchase.request')
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requests = Request.search([
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('purchase_line.moves', '=', None),
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('purchase_line.purchase.state', '!=', 'cancel'),
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('origin', 'like', 'stock.order_point,%'),
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])
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# Fetch data from existing requests
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existing_req = {}
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for request in requests:
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pline = request.purchase_line
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# Skip incoherent request
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if request.product.id != pline.product.id or \
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request.warehouse.id != pline.purchase.warehouse.id:
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continue
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# Take smallest amount between request and purchase line
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req_qty = Uom.compute_qty(request.uom, request.quantity,
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pline.unit)
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if req_qty < pline.quantity:
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quantity = request.quantity
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uom = request.uom
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else:
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quantity = pline.quantity
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uom = pline.unit
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existing_req.setdefault(
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(request.product.id, request.warehouse.id),
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[]).append({
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'supply_date': (
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request.supply_date or datetime.date.max),
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'quantity': quantity,
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'uom': uom,
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})
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for i in existing_req.itervalues():
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i.sort(lambda r, s: cmp(r['supply_date'], s['supply_date']))
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# Update new requests to take existing requests into account
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new_requests.sort(key=operator.attrgetter('supply_date'))
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for new_req in new_requests:
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for old_req in existing_req.get(
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(new_req.product.id, new_req.warehouse.id), []):
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if old_req['supply_date'] <= new_req.supply_date:
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quantity = Uom.compute_qty(old_req['uom'],
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old_req['quantity'], new_req.uom)
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new_req.quantity = max(0.0, new_req.quantity - quantity)
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new_req.computed_quantity = new_req.quantity
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old_req['quantity'] = Uom.compute_qty(new_req.uom,
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max(0.0, quantity - new_req.quantity), old_req['uom'])
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else:
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break
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return new_requests
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@classmethod
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def get_supply_dates(cls, product):
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"""
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Return the minimal interval of earliest supply dates for a product.
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"""
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Date = Pool().get('ir.date')
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min_date = None
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max_date = None
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today = Date.today()
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for product_supplier in product.product_suppliers:
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supply_date = product_supplier.compute_supply_date(date=today)
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# TODO next_day is by default today + 1 but should depends
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# on the CRON activity
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next_day = today + datetime.timedelta(1)
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next_supply_date = product_supplier.compute_supply_date(
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date=next_day)
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if (not min_date) or supply_date < min_date:
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min_date = supply_date
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if (not max_date):
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max_date = next_supply_date
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if supply_date > min_date and supply_date < max_date:
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max_date = supply_date
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if next_supply_date < max_date:
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max_date = next_supply_date
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if not min_date:
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min_date = datetime.date.max
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max_date = datetime.date.max
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return (min_date, max_date)
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@classmethod
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def find_best_supplier(cls, product, date):
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'''
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Return the best supplier and purchase_date for the product.
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'''
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Date = Pool().get('ir.date')
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supplier = None
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today = Date.today()
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for product_supplier in product.product_suppliers:
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supply_date = product_supplier.compute_supply_date(date=today)
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timedelta = date - supply_date
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if not supplier and timedelta >= datetime.timedelta(0):
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supplier = product_supplier.party
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break
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if supplier:
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purchase_date = product_supplier.compute_purchase_date(date)
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else:
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purchase_date = today
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return supplier, purchase_date
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@classmethod
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def compute_request(cls, product, location_id, shortage_date,
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product_quantity, company, order_point=None):
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"""
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Return the value of the purchase request which will answer to
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the needed quantity at the given date. I.e: the latest
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purchase date, the expected supply date and the prefered
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supplier.
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"""
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pool = Pool()
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Uom = pool.get('product.uom')
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Request = pool.get('purchase.request')
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supplier, purchase_date = cls.find_best_supplier(product,
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shortage_date)
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max_quantity = order_point and order_point.max_quantity or 0.0
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quantity = Uom.compute_qty(product.default_uom,
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max_quantity - product_quantity,
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product.purchase_uom or product.default_uom)
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if order_point:
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origin = 'stock.order_point,%s' % order_point.id
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else:
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origin = 'stock.order_point,-1'
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return Request(product=product,
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party=supplier and supplier or None,
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quantity=quantity,
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uom=product.purchase_uom or product.default_uom,
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computed_quantity=quantity,
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computed_uom=product.purchase_uom or product.default_uom,
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purchase_date=purchase_date,
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supply_date=shortage_date,
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stock_level=product_quantity,
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company=company,
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warehouse=location_id,
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origin=origin,
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)
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@classmethod
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def get_shortage(cls, location_id, product_ids, min_date, max_date,
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min_date_qties, order_points):
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"""
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Return for each product the first date between min_date and max_date
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where the stock quantity is less than the minimal quantity and the
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smallest stock quantity in the interval or None if there is no date
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where stock quantity is less than the minimal quantity.
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The minimal quantity comes from the order point or is zero.
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min_date_qty is the quantities for each products at the min_date.
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order_points is a dictionary that links products to order point.
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"""
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Product = Pool().get('product.product')
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res_dates = {}
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res_qties = {}
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min_quantities = {}
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for product_id in product_ids:
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order_point = order_points.get((location_id, product_id))
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if order_point:
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min_quantities[product_id] = order_point.min_quantity
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else:
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min_quantities[product_id] = 0.0
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current_date = min_date
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current_qties = min_date_qties.copy()
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while (current_date < max_date) or (current_date == min_date):
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for product_id in product_ids:
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current_qty = current_qties[product_id]
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min_quantity = min_quantities[product_id]
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res_qty = res_qties.get(product_id)
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res_date = res_dates.get(product_id)
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if current_qty < min_quantity:
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if not res_date:
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res_dates[product_id] = current_date
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if (not res_qty) or (current_qty < res_qty):
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res_qties[product_id] = current_qty
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with Transaction().set_context(stock_date_start=current_date,
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stock_date_end=current_date):
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pbl = Product.products_by_location([location_id],
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product_ids, with_childs=True, skip_zero=False)
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for key, qty in pbl.iteritems():
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_, product_id = key
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current_qties[product_id] += qty
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if current_date == datetime.date.max:
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break
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current_date += datetime.timedelta(1)
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return dict((x, (res_dates.get(x), res_qties.get(x)))
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for x in product_ids)
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@classmethod
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def create(cls, vlist):
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for vals in vlist:
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for field_name in ('product', 'quantity', 'uom', 'company'):
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if not vals.get(field_name):
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cls.raise_user_error('create_request')
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return super(PurchaseRequest, cls).create(vlist)
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class CreatePurchaseRequestStart(ModelView):
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'Create Purchase Request'
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__name__ = 'purchase.request.create.start'
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class CreatePurchaseRequest(Wizard):
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'Create Purchase Request'
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__name__ = 'purchase.request.create'
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start = StateView('purchase.request.create.start',
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'stock_supply.purchase_request_create_start_view_form', [
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Button('Cancel', 'end', 'tryton-cancel'),
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Button('Create', 'create_', 'tryton-ok', default=True),
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])
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create_ = StateAction('stock_supply.act_purchase_request_form')
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def do_create_(self, action):
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PurchaseRequest = Pool().get('purchase.request')
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PurchaseRequest.generate_requests()
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return action, {}
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def transition_create_(self):
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return 'end'
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class CreatePurchaseAskTerm(ModelView):
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'Create Purchase Ask Term'
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__name__ = 'purchase.request.create_purchase.ask_term'
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party = fields.Many2One('party.party', 'Supplier', readonly=True)
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company = fields.Many2One('company.company', 'Company', readonly=True)
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payment_term = fields.Many2One(
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'account.invoice.payment_term', 'Payment Term', required=True)
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class CreatePurchaseAskParty(ModelView):
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'Create Purchase Ask Party'
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__name__ = 'purchase.request.create_purchase.ask_party'
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product = fields.Many2One('product.product', 'Product', readonly=True)
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company = fields.Many2One('company.company', 'Company', readonly=True)
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party = fields.Many2One('party.party', 'Supplier', required=True)
|
|
|
|
|
|
class CreatePurchase(Wizard):
|
|
'Create Purchase'
|
|
__name__ = 'purchase.request.create_purchase'
|
|
start = StateTransition()
|
|
ask_party = StateView('purchase.request.create_purchase.ask_party',
|
|
'stock_supply.purchase_request_create_purchase_ask_party', [
|
|
Button('Cancel', 'end', 'tryton-cancel'),
|
|
Button('Continue', 'start', 'tryton-go-next', default=True),
|
|
])
|
|
ask_term = StateView('purchase.request.create_purchase.ask_term',
|
|
'stock_supply.purchase_request_create_purchase_ask_term_view_form', [
|
|
Button('Cancel', 'end', 'tryton-cancel'),
|
|
Button('Continue', 'start', 'tryton-go-next', default=True),
|
|
])
|
|
|
|
@classmethod
|
|
def __setup__(cls):
|
|
super(CreatePurchase, cls).__setup__()
|
|
cls._error_messages.update({
|
|
'missing_price': 'Purchase price is missing for product "%s".',
|
|
'please_update': ('This price is necessary for creating '
|
|
'purchases.'),
|
|
})
|
|
|
|
def default_ask_party(self, fields):
|
|
Request = Pool().get('purchase.request')
|
|
requests = Request.browse(Transaction().context['active_ids'])
|
|
for request in requests:
|
|
if request.purchase_line:
|
|
continue
|
|
if not request.party:
|
|
return {
|
|
'product': request.product.id,
|
|
'company': request.company.id,
|
|
}
|
|
return {
|
|
'product': request.product.id,
|
|
'company': request.company.id,
|
|
}
|
|
|
|
def default_ask_term(self, fields):
|
|
Request = Pool().get('purchase.request')
|
|
requests = Request.browse(Transaction().context['active_ids'])
|
|
for request in requests:
|
|
if (not request.party) or request.purchase_line:
|
|
continue
|
|
if not request.party.supplier_payment_term:
|
|
return {
|
|
'party': request.party.id,
|
|
'company': request.company.id,
|
|
}
|
|
return {
|
|
'party': request.party.id,
|
|
'company': request.company.id,
|
|
}
|
|
|
|
@staticmethod
|
|
def _group_purchase_key(requests, request):
|
|
'''
|
|
The key to group lines by purchases
|
|
A list of key-value as tuples of the purchase
|
|
'''
|
|
return (
|
|
('company', request.company),
|
|
('party', request.party),
|
|
('payment_term', request.party.supplier_payment_term),
|
|
('warehouse', request.warehouse),
|
|
# XXX use function field
|
|
('currency', request.company.currency),
|
|
('invoice_address', request.party.address_get(type='invoice')),
|
|
)
|
|
|
|
def transition_start(self):
|
|
pool = Pool()
|
|
Request = pool.get('purchase.request')
|
|
Party = pool.get('party.party')
|
|
Purchase = pool.get('purchase.purchase')
|
|
Date = pool.get('ir.date')
|
|
|
|
request_ids = Transaction().context['active_ids']
|
|
|
|
if (getattr(self.ask_party, 'product', None)
|
|
and getattr(self.ask_party, 'party', None)
|
|
and getattr(self.ask_party, 'company', None)):
|
|
reqs = Request.search([
|
|
('id', 'in', request_ids),
|
|
('party', '=', None),
|
|
])
|
|
if reqs:
|
|
Request.write(reqs, {
|
|
'party': self.ask_party.party.id,
|
|
})
|
|
self.ask_party.product = None
|
|
self.ask_party.party = None
|
|
self.ask_party.company = None
|
|
elif (getattr(self.ask_term, 'payment_term', None)
|
|
and getattr(self.ask_term, 'party', None)
|
|
and getattr(self.ask_term, 'company', None)):
|
|
with Transaction().set_context(
|
|
company=self.ask_term.company.id):
|
|
Party.write([self.ask_term.party], {
|
|
'supplier_payment_term': (
|
|
self.ask_term.payment_term.id),
|
|
})
|
|
self.ask_term.payment_term = None
|
|
self.ask_term.party = None
|
|
self.ask_term.company = None
|
|
|
|
reqs = Request.search([
|
|
('id', 'in', request_ids),
|
|
('purchase_line', '=', None),
|
|
('party', '=', None),
|
|
])
|
|
if reqs:
|
|
return 'ask_party'
|
|
|
|
today = Date.today()
|
|
requests = Request.browse(request_ids)
|
|
|
|
requests = [r for r in requests if not r.purchase_line]
|
|
if any(r for r in requests if not r.party.supplier_payment_term):
|
|
return 'ask_term'
|
|
|
|
keyfunc = partial(self._group_purchase_key, requests)
|
|
requests = sorted(requests, key=keyfunc)
|
|
|
|
with Transaction().set_user(0, set_context=True):
|
|
for key, grouped_requests in groupby(requests, key=keyfunc):
|
|
grouped_requests = list(grouped_requests)
|
|
try:
|
|
purchase_date = min(r.purchase_date
|
|
for r in grouped_requests
|
|
if r.purchase_date)
|
|
except ValueError:
|
|
purchase_date = today
|
|
if purchase_date < today:
|
|
purchase_date = today
|
|
purchase = Purchase(purchase_date=purchase_date)
|
|
for f, v in key:
|
|
setattr(purchase, f, v)
|
|
purchase.save()
|
|
for request in grouped_requests:
|
|
line = self.compute_purchase_line(request)
|
|
line.purchase = purchase
|
|
line.save()
|
|
Request.write([request], {
|
|
'purchase_line': line.id,
|
|
})
|
|
return 'end'
|
|
|
|
@staticmethod
|
|
def _get_tax_rule_pattern(request):
|
|
'''
|
|
Get tax rule pattern
|
|
'''
|
|
return {}
|
|
|
|
@classmethod
|
|
def compute_purchase_line(cls, request):
|
|
pool = Pool()
|
|
Product = pool.get('product.product')
|
|
Line = pool.get('purchase.line')
|
|
|
|
line = Line(
|
|
product=request.product,
|
|
unit=request.uom,
|
|
quantity=request.quantity,
|
|
description=request.product.name,
|
|
)
|
|
|
|
# XXX purchase with several lines of the same product
|
|
with Transaction().set_context(uom=request.uom.id,
|
|
supplier=request.party.id,
|
|
currency=request.company.currency.id):
|
|
product_price = Product.get_purchase_price(
|
|
[request.product], request.quantity)[request.product.id]
|
|
product_price = product_price.quantize(
|
|
Decimal(1) / 10 ** Line.unit_price.digits[1])
|
|
|
|
if product_price is None:
|
|
cls.raise_user_error('missing_price', (request.product.rec_name,),
|
|
'please_update')
|
|
line.unit_price = product_price
|
|
|
|
taxes = []
|
|
for tax in request.product.supplier_taxes_used:
|
|
if request.party and request.party.supplier_tax_rule:
|
|
pattern = cls._get_tax_rule_pattern(request)
|
|
tax_ids = request.party.supplier_tax_rule.apply(tax, pattern)
|
|
if tax_ids:
|
|
taxes.extend(tax_ids)
|
|
continue
|
|
taxes.append(tax.id)
|
|
line.taxes = taxes
|
|
return line
|