#This file is part of Tryton. The COPYRIGHT file at the top level of #this repository contains the full copyright notices and license terms. import datetime import operator from trytond.model import ModelView, ModelSQL, fields from trytond.wizard import Wizard from trytond.pyson import If, In, Eval, Get from trytond.transaction import Transaction from trytond.pool import Pool class PurchaseRequest(ModelSQL, ModelView): 'Purchase Request' _name = 'purchase.request' _description = __doc__ product = fields.Many2One( 'product.product', 'Product', required=True, select=1, readonly=True, domain=[('purchasable', '=', True)]) party = fields.Many2One('party.party', 'Party', select=1) quantity = fields.Float('Quantity', required=True) uom = fields.Many2One('product.uom', 'UOM', required=True, select=1) computed_quantity = fields.Float('Computed Quantity', readonly=True) computed_uom = fields.Many2One('product.uom', 'Computed UOM', readonly=True) purchase_date = fields.Date('Best Purchase Date', readonly=True) supply_date = fields.Date('Expected Supply Date', readonly=True) stock_level = fields.Float('Stock at Supply Date', readonly=True) warehouse = fields.Many2One( 'stock.location', "Warehouse", required=True, domain=[('type', '=', 'warehouse')], readonly=True) purchase_line = fields.Many2One( 'purchase.line', 'Purchase Line',readonly=True) purchase = fields.Function(fields.Many2One('purchase.purchase', 'Purchase'), 'get_purchase') company = fields.Many2One('company.company', 'Company', required=True, readonly=True, domain=[ ('id', If(In('company', Eval('context', {})), '=', '!='), Get(Eval('context', {}), 'company', 0)), ]) origin = fields.Reference('Origin', selection='origin_get', readonly=True, required=True) state = fields.Function(fields.Selection([ ('purchased', 'Purchased'), ('done', 'Done'), ('draft', 'Draft'), ('cancel', 'Cancel'), ], 'State'), 'get_state') def __init__(self): super(PurchaseRequest, self).__init__() self._order[0] = ('id', 'DESC') self._error_messages.update({ 'create_request': 'Purchase requests are only created by the system.', }) def init(self, module_name): cursor = Transaction().cursor super(PurchaseRequest, self).init(module_name) # Migration from 2.0: empty order point origin is -1 instead of 0 cursor.execute('UPDATE "%s" ' 'SET origin = %%s WHERE origin = %%s' % self._table, ('stock.order_point,-1', 'stock.order_point,0')) def get_rec_name(self, ids, name): if isinstance(ids, (int, long)): ids = [ids] res = {} for pr in self.browse(ids): res[pr.id] = "%s@%s" % (pr.product.name, pr.warehouse.name) return res def search_rec_name(self, name, clause): res = [] names = clause[2].split('@', 1) res.append(('product.template.name', clause[1], names[0])) if len(names) != 1 and names[1]: res.append(('warehouse', clause[1], names[1])) return res def default_company(self): return Transaction().context.get('company') or False def get_purchase(self, ids, name): res = {} requests = self.browse(ids) for request in requests: if request.purchase_line: res[request.id] = request.purchase_line.purchase.id else: res[request.id] = False return res def get_state(self, ids, name): res = {}.fromkeys(ids, 'draft') for request in self.browse(ids): if request.purchase_line: if request.purchase_line.purchase.state == 'cancel': res[request.id] = 'cancel' elif request.purchase_line.purchase.state == 'done': res[request.id] = 'done' else: res[request.id] = 'purchased' return res def origin_get(self): model_obj = Pool().get('ir.model') res = [] model_ids = model_obj.search([ ('model', '=', 'stock.order_point'), ]) for model in model_obj.browse(model_ids): res.append([model.model, model.name]) return res def generate_requests(self): """ For each product compute the purchase request that must be create today to meet product outputs. """ pool = Pool() order_point_obj = pool.get('stock.order_point') product_obj = pool.get('product.product') location_obj = pool.get('stock.location') user_obj = pool.get('res.user') company = user_obj.browse(Transaction().user).company # fetch warehouses: warehouse_ids = location_obj.search([ ('type','=','warehouse'), ]) # fetch order points order_point_ids = order_point_obj.search([ ('type', '=', 'purchase'), ]) # index them by product product2ops = {} for order_point in order_point_obj.browse(order_point_ids): product2ops[ (order_point.warehouse_location.id, order_point.product.id) ] = order_point # fetch stockable products product_ids = product_obj.search([ ('type', '=', 'stockable'), ('purchasable', '=', True), ]) #aggregate product by minimum supply date date2products = {} for product in product_obj.browse(product_ids): min_date, max_date = self.get_supply_dates(product) date2products.setdefault(min_date, []).append((product, max_date)) # compute requests new_requests = [] for min_date in date2products: product_ids = [x[0].id for x in date2products[min_date]] with Transaction().set_context(forecast=True, stock_date_end=min_date or datetime.date.max): pbl = product_obj.products_by_location(warehouse_ids, product_ids, with_childs=True, skip_zero=False) for product, max_date in date2products[min_date]: for warehouse_id in warehouse_ids: qty = pbl.pop((warehouse_id, product.id)) order_point = product2ops.get((warehouse_id, product.id)) # Search for shortage between min-max shortage_date, product_quantity = self.get_shortage( warehouse_id, product.id, min_date, max_date, min_date_qty=qty, order_point=order_point) if shortage_date == None or product_quantity == None: continue # generate request values request_val = self.compute_request(product, warehouse_id, shortage_date, product_quantity, company, order_point) new_requests.append(request_val) new_requests = self.compare_requests(new_requests) self.create_requests(new_requests) return {} def create_requests(self, new_requests): request_obj = Pool().get('purchase.request') for new_req in new_requests: if new_req['supply_date'] == datetime.date.max: new_req['supply_date'] = None if new_req['quantity'] > 0.0: new_req.update({'product': new_req['product'].id, 'party': new_req['party'] and new_req['party'].id, 'uom': new_req['uom'].id, 'computed_uom': new_req['computed_uom'].id, 'company': new_req['company'].id }) request_obj.create(new_req) def compare_requests(self, new_requests): """ Compare new_requests with already existing request to avoid to re-create existing requests. """ # delete purchase request without a purchase line pool = Pool() uom_obj = pool.get('product.uom') request_obj = pool.get('purchase.request') req_ids = request_obj.search([ ('purchase_line', '=', False), ('origin', 'like', 'stock.order_point,%'), ]) request_obj.delete(req_ids) req_ids = request_obj.search([ ('purchase_line.moves', '=', False), ('purchase_line.purchase.state', '!=', 'cancel'), ('origin', 'like', 'stock.order_point,%'), ]) requests = request_obj.browse(req_ids) # Fetch data from existing requests existing_req = {} for request in requests: pline = request.purchase_line # Skip incoherent request if request.product.id != pline.product.id or \ request.warehouse.id != pline.purchase.warehouse.id: continue # Take smallest amount between request and purchase line req_qty = uom_obj.compute_qty(request.uom, request.quantity, pline.unit) if req_qty < pline.quantity: quantity = request.quantity uom = request.uom else: quantity = pline.quantity uom = pline.unit existing_req.setdefault( (request.product.id, request.warehouse.id), []).append({'supply_date': request.supply_date or datetime.date.max, 'quantity': quantity, 'uom': uom} ) for i in existing_req.itervalues(): i.sort(lambda r,s: cmp(r['supply_date'],s['supply_date'])) # Update new requests to take existing requests into account new_requests.sort(key=operator.itemgetter('supply_date')) for new_req in new_requests: for old_req in existing_req.get((new_req['product'].id, new_req['warehouse']), []): if old_req['supply_date'] <= new_req['supply_date']: quantity = uom_obj.compute_qty(old_req['uom'], old_req['quantity'], new_req['uom']) new_req['quantity'] = max(0.0, new_req['quantity'] - quantity) new_req['computed_quantity'] = new_req['quantity'] old_req['quantity'] = uom_obj.compute_qty(new_req['uom'], max(0.0, quantity - new_req['quantity']), old_req['uom']) else: break return new_requests def get_supply_dates(self, product): """ Return the minimal interval of earliest supply dates for a product. :param product: a BrowseRecord of the Product :return: a tuple with the two dates """ product_supplier_obj = Pool().get('purchase.product_supplier') date_obj = Pool().get('ir.date') min_date = None max_date = None today = date_obj.today() for product_supplier in product.product_suppliers: supply_date, next_supply_date = product_supplier_obj.\ compute_supply_date(product_supplier, date=today) if (not min_date) or supply_date < min_date: min_date = supply_date if (not max_date): max_date = next_supply_date if supply_date > min_date and supply_date < max_date: max_date = supply_date if next_supply_date < max_date: max_date = next_supply_date if not min_date: min_date = datetime.date.max max_date = datetime.date.max return (min_date, max_date) def find_best_supplier(self, product, date): ''' Return the best supplier and purchase_date for the product. ''' pool = Pool() date_obj = pool.get('ir.date') product_supplier_obj = pool.get('purchase.product_supplier') supplier = None timedelta = datetime.timedelta.max today = date_obj.today() for product_supplier in product.product_suppliers: supply_date = product_supplier_obj.compute_supply_date( product_supplier, date=today)[0] sup_timedelta = date - supply_date if not supplier: supplier = product_supplier.party timedelta = sup_timedelta continue if timedelta < datetime.timedelta(0) \ and (sup_timedelta >= datetime.timedelta(0) \ or sup_timedelta > timedelta): supplier = product_supplier.party timedelta = sup_timedelta if supplier: purchase_date = product_supplier_obj.compute_purchase_date( product_supplier, date) else: purchase_date = today return supplier, purchase_date def compute_request(self, product, location_id, shortage_date, product_quantity, company, order_point=None): """ Return the value of the purchase request which will answer to the needed quantity at the given date. I.e: the latest purchase date, the expected supply date and the prefered supplier. """ pool = Pool() uom_obj = pool.get('product.uom') supplier, purchase_date = self.find_best_supplier(product, shortage_date) max_quantity = order_point and order_point.max_quantity or 0.0 quantity = uom_obj.compute_qty(product.default_uom, max_quantity - product_quantity, product.purchase_uom or product.default_uom) if order_point: origin = 'stock.order_point,%s'%order_point.id else: origin = 'stock.order_point,-1' return {'product': product, 'party': supplier and supplier or None, 'quantity': quantity, 'uom': product.purchase_uom or product.default_uom, 'computed_quantity': quantity, 'computed_uom': product.purchase_uom or product.default_uom, 'purchase_date': purchase_date, 'supply_date': shortage_date, 'stock_level': product_quantity, 'company': company, 'warehouse': location_id, 'origin': origin, } def get_shortage(self, location_id, product_id, min_date, max_date, min_date_qty, order_point=None): """ Return between min_date and max_date the first date where the stock quantity is less than the minimal quantity and the smallest stock quantity in the interval or None if there is no date where stock quantity is less than the minimal quantity The minimal quantity comes from the order_point or is zero :param location_id: the stock location id :param produc_id: the product id :param min_date: the minimal date :param max_date: the maximal date :param min_date_qty: the stock quantity at the minimal date :param order_point: a BrowseRecord of the Order Point :return: a tuple with the date and the quantity """ product_obj = Pool().get('product.product') res_date = None res_qty = None min_quantity = order_point and order_point.min_quantity or 0.0 current_date = min_date current_qty = min_date_qty while (current_date < max_date) or (current_date == min_date): if current_qty < min_quantity: if not res_date: res_date = current_date if (not res_qty) or (current_qty < res_qty): res_qty = current_qty with Transaction().set_context(stock_date_start=current_date, stock_date_end=current_date): res = product_obj.products_by_location([location_id], [product_id], with_childs=True, skip_zero=False) for qty in res.itervalues(): current_qty += qty if current_date == datetime.date.max: break current_date += datetime.timedelta(1) return (res_date, res_qty) def create(self, vals): for field_name in ('product', 'quantity', 'uom', 'warehouse', 'company'): if not vals.get(field_name): self.raise_user_error('create_request') return super(PurchaseRequest, self).create(vals) PurchaseRequest() class CreatePurchaseRequestInit(ModelView): 'Create Purchase Request Init' _name = 'purchase.request.create_purchase_request.init' _description = __doc__ CreatePurchaseRequestInit() class CreatePurchaseRequest(Wizard): 'Create Purchase Request' _name = 'purchase.request.create_purchase_request' states = { 'init': { 'result': { 'type': 'form', 'object': 'purchase.request.create_purchase_request.init', 'state': [ ('end', 'Cancel', 'tryton-cancel'), ('create', 'Create', 'tryton-ok', True), ], }, }, 'create': { 'actions': ['_create_purchase_request'], 'result': { 'type': 'action', 'action': '_open', 'state': 'end', }, }, } def _create_purchase_request(self, data): purchase_request_obj = Pool().get('purchase.request') purchase_request_obj.generate_requests() return {} def _open(self, data): pool = Pool() model_data_obj = pool.get('ir.model.data') act_window_obj = pool.get('ir.action.act_window') act_window_id = model_data_obj.get_id('stock_supply', 'act_purchase_request_form_draft') return act_window_obj.read(act_window_id) CreatePurchaseRequest() class CreatePurchaseAskTerm(ModelView): 'Create Purchase Ask Term' _name = 'purchase.request.create_purchase.ask_term' _description = __doc__ party = fields.Many2One('party.party', 'Supplier', readonly=True) company = fields.Many2One('company.company', 'Company', readonly=True) payment_term = fields.Many2One( 'account.invoice.payment_term', 'Payment Term', required=True) CreatePurchaseAskTerm() class CreatePurchaseAskParty(ModelView): 'Create Purchase Ask Party' _name = 'purchase.request.create_purchase.ask_party' _description = __doc__ product = fields.Many2One('product.product', 'Product', readonly=True) company = fields.Many2One('company.company', 'Company', readonly=True) party = fields.Many2One('party.party', 'Supplier', required=True) CreatePurchaseAskParty() class CreatePurchase(Wizard): 'Create Purchase' _name = 'purchase.request.create_purchase' states = { 'init': { 'result': { 'type': 'choice', 'next_state': '_create_purchase', }, }, 'ask_user_party': { 'actions': ['_set_default_party'], 'result': { 'type': 'form', 'object': 'purchase.request.create_purchase.ask_party', 'state': [ ('end', 'Cancel', 'tryton-cancel'), ('init', 'Continue', 'tryton-go-next', True), ], }, }, 'ask_user_term': { 'actions': ['_set_default_term'], 'result': { 'type': 'form', 'object': 'purchase.request.create_purchase.ask_term', 'state': [ ('end', 'Cancel', 'tryton-cancel'), ('init', 'Continue', 'tryton-go-next', True), ], }, }, } def __init__(self): super(CreatePurchase, self).__init__() self._error_messages.update({ 'missing_price': 'Purchase price is missing for product: %s (id: %s)!', 'please_update': 'This price is necessary for creating purchase.' }) def _set_default_party(self, data): request_obj = Pool().get('purchase.request') requests = request_obj.browse(data['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 _set_default_term(self, data): request_obj = Pool().get('purchase.request') requests = request_obj.browse(data['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} def _create_purchase(self, data): pool = Pool() request_obj = pool.get('purchase.request') party_obj = pool.get('party.party') purchase_obj = pool.get('purchase.purchase') line_obj = pool.get('purchase.line') date_obj = pool.get('ir.date') form = data['form'] if form.get('product') and form.get('party') and \ form.get('company'): req_ids = request_obj.search([ ('id', 'in', data['ids']), ('party', '=', False), ]) if req_ids: request_obj.write(req_ids, {'party': form['party']}) elif form.get('payment_term') and form.get('party') and \ form.get('company'): with Transaction().set_context(company=form['company']): party_obj.write(form['party'],{ 'supplier_payment_term': form['payment_term'] }) req_ids = request_obj.search([ ('id', 'in', data['ids']), ('purchase_line', '=', False), ('party', '=', False), ]) if req_ids: return 'ask_user_party' today = date_obj.today() requests = request_obj.browse(data['ids']) purchases = {} # collect data for request in requests: if request.purchase_line: continue if not request.party.supplier_payment_term: return 'ask_user_term' key = (request.party.id, request.company.id, request.warehouse.id) if key not in purchases: if request.purchase_date and request.purchase_date >= today: purchase_date = request.purchase_date else: purchase_date = today purchase = { 'company': request.company.id, 'party': request.party.id, 'purchase_date': purchase_date, 'payment_term': request.party.supplier_payment_term.id, 'warehouse': request.warehouse.id, 'currency': request.company.currency.id, 'invoice_address': party_obj.address_get(request.party.id, type='invoice'), 'lines': [], } purchases[key] = purchase else: purchase = purchases[key] line = self.compute_purchase_line(request) purchase['lines'].append(line) if request.purchase_date: if purchase.get('purchase_date'): purchase['purchase_date'] = min(purchase['purchase_date'], request.purchase_date) else: purchase['purchase_date'] = request.purchase_date # Create all for purchase in purchases.itervalues(): lines = purchase.pop('lines') with Transaction().set_user(0, set_context=True): purchase_id = purchase_obj.create(purchase) for line in lines: request_id = line.pop('request') line['purchase'] = purchase_id with Transaction().set_user(0): line_id = line_obj.create(line) request_obj.write(request_id, {'purchase_line': line_id}) return 'end' def _get_tax_rule_pattern(self, request): ''' Get tax rule pattern :param request: the BrowseRecord of the purchase request :return: a dictionary to use as pattern for tax rule ''' res = {} return res def compute_purchase_line(self, request): pool = Pool() product_obj = pool.get('product.product') tax_rule_obj = pool.get('account.tax.rule') line = { 'product': request.product.id, 'unit': request.uom.id, 'quantity': request.quantity, 'request': request.id, '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_obj.get_purchase_price( [request.product.id], request.quantity)[request.product.id] if not product_price: self.raise_user_error('missing_price', (request.product.name, request.product.id), '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 = self._get_tax_rule_pattern(request) tax_id = tax_rule_obj.apply(request.party.supplier_tax_rule, tax, pattern) if tax_id: taxes.append(tax_id) continue taxes.append(tax.id) line['taxes'] = [('add', taxes)] return line CreatePurchase()