from tools.com_cache import cache, ctime, timeblock

# 使用SQL來取得指定商品在指定倉庫的庫存數(shù)量

def get_warehouse_stock_qty(self,warehouse_id):

self.ensure_one()

# 從緩存中查詢，如有

cache_data = cache.warehouse_stock_qty.get([self.id,warehouse_id])

if isinstance(cache_data,list):

# 則直接將緩存中的數(shù)據(jù)返回。 要注意：每次出入庫審核時(shí)將緩存中的數(shù)據(jù)清空或者更新，保證緩存數(shù)據(jù)是最新的。

return cache_data

# 若無，則從數(shù)據(jù)庫查詢

self.env.cr.execute('''

SELECT sum(CASE WHEN whi.transport_state = 'onway' OR buyr.buy_receipt_state = 'onway' THEN 0 ELSE

line.qty_remaining END) as qty,

SUM(line.qty_remaining * line.cost_unit) AS cost,

wh.name as warehouse

FROM wh_move_line line

LEFT JOIN wh_move whm ON whm.id = line.move_id

LEFT JOIN wh_internal whi ON whm.id = whi.move_id

LEFT JOIN buy_receipt buyr ON whm.id = buyr.buy_move_id

LEFT JOIN warehouse wh ON line.warehouse_dest_id = wh.id

WHERE wh.type in ('stock','supplier')

AND wh.code not in ('Supplier','General')

AND line.qty_remaining != 0

AND line.state in ('done','onway')

AND line.goods_id = %s

AND wh.id= %s

GROUP BY wh.name

''' % (self.id,warehouse_id))

rows=self.env.cr.dictfetchall()

# 將查詢結(jié)果寫入緩存中

cache.warehouse_stock_qty.set((self.id,warehouse_id),rows)

return rows

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