MRP Force Reservation的作用
生产单根据BOM计算出相应的物料需求，生产领料单stock.picking ( internal moves)
Stock.picking使用工作流自动计算库存量，如果库存量够，则使用 test_assigned() 将 picking的状态切换到 assigned
test_assigned()调用 stock.check_assign() 计算库存量是否够
如果原材料库存量不够，生产单就会处于 confirmed 状态，而不能进入 assigned状态 （ 子工作流 ）
使用force reservation按钮之后，系统会把picking对应的stock.move预留下来，这样就可以完成移库操作；如工作流所示
picking状态为 assigned的，就是可以完成picking的文档
而stock.move状态的改变，会影响到'产品可用数量'
模型 stock.move
def check_assign(self, cr, uid, ids, context=None):
""" Checks the product type and accordingly writes the state.
@return: No. of moves done
"""
done = []
count = 0
pickings = {}
if context is None:
context = {}
for move in self.browse(cr, uid, ids, context=context):
if move.product_id.type == 'consu' or move.location_id.usage == 'supplier':
if move.state in ('confirmed', 'waiting'):
done.append(move.id)
pickings[move.picking_id.id] = 1
continue
if move.state in ('confirmed', 'waiting'):
# Important: we must pass lock=True to _product_reserve() to avoid race conditions and double reservations
res = self.pool.get('stock.location')._product_reserve(cr, uid, [move.location_id.id], move.product_id.id, move.product_qty, {'uom': move.product_uom.id}, lock=True)
if res:
#_product_available_test depends on the next status for correct functioning
#the test does not work correctly if the same product occurs multiple times
#in the same order. This is e.g. the case when using the button 'split in two' of
#the stock outgoing form
self.write(cr, uid, [move.id], {'state':'assigned'})
done.append(move.id)
pickings[move.picking_id.id] = 1
r = res.pop(0)
product_uos_qty = self.pool.get('stock.move').onchange_quantity(cr, uid, ids, move.product_id.id, r[0], move.product_id.uom_id.id, move.product_id.uos_id.id)['value']['product_uos_qty']
move.write({
'location_id': r[1],
'product_qty': r[0],
'product_uos_qty': product_uos_qty,
})
while res:
r = res.pop(0)
product_uos_qty = self.pool.get('stock.move').onchange_quantity(cr, uid, ids, move.product_id.id, r[0], move.product_id.uom_id.id, move.product_id.uos_id.id)['value']['product_uos_qty']
move_id = self.copy(cr, uid, move.id, {'product_uos_qty': product_uos_qty, 'product_qty': r[0], 'location_id': r[1]})
done.append(move_id)
if done:
count += len(done)
self.write(cr, uid, done, {'state': 'assigned'})
if count:
for pick_id in pickings:
wf_service = netsvc.LocalService("workflow")
wf_service.trg_write(uid, 'stock.picking', pick_id, cr)
return count
模型 product.product
def _product_available(self, cr, uid, ids, field_names=None, arg=False, context=None):
""" Finds the incoming and outgoing quantity of product.
@return: Dictionary of values
"""
if not field_names:
field_names = []
if context is None:
context = {}
res = {}
for id in ids:
res[id] = {}.fromkeys(field_names, 0.0)
for f in field_names:
c = context.copy()
if f == 'qty_available':
c.update({ 'states': ('done',), 'what': ('in', 'out') })
if f == 'virtual_available':
c.update({ 'states': ('confirmed','waiting','assigned','done'), 'what': ('in', 'out') })
if f == 'incoming_qty':
c.update({ 'states': ('confirmed','waiting','assigned'), 'what': ('in',) })
if f == 'outgoing_qty':
c.update({ 'states': ('confirmed','waiting','assigned'), 'what': ('out',) })
stock = self.get_product_available(cr, uid, ids, context=c)
for id in ids:
res[id][f] = stock.get(id, 0.0)
return res
模型 mrp.production
def force_production(self, cr, uid, ids, *args):
""" Assigns products.
@param *args: Arguments
@return: True
"""
pick_obj = self.pool.get('stock.picking')
pick_obj.force_assign(cr, uid, [prod.picking_id.id for prod in self.browse(cr, uid, ids)])
return True
模型 stock.picking
def force_assign(self, cr, uid, ids, *args):
""" Changes state of picking to available if moves are confirmed or waiting.
@return: True
"""
wf_service = netsvc.LocalService("workflow")
for pick in self.browse(cr, uid, ids):
move_ids = [x.id for x in pick.move_lines if x.state in ['confirmed','waiting']]
self.pool.get('stock.move').force_assign(cr, uid, move_ids)
wf_service.trg_write(uid, 'stock.picking', pick.id, cr)
return True
模型 stock.move
def force_assign(self, cr, uid, ids, context=None):
""" Changes the state to assigned.
@return: True
"""
self.write(cr, uid, ids, {'state': 'assigned'})
wf_service = netsvc.LocalService('workflow')
for move in self.browse(cr, uid, ids, context):
if move.picking_id:
wf_service.trg_write(uid, 'stock.picking', move.picking_id.id, cr)
return True
工作流 -生产单 -调用拣货子流程
工作流 -拣货单
