odoo获取继承模型的计算字段

Question

我写了一个继承了[[purchase.order的类，所以我想获取“ amount_untaxed”的值，它是一个计算字段。我尝试过此代码：

class PurchaseOrderInherit(models.Model):
    _inherit='purchase.order'
    test_value=fields.Float(string='test value')

@api.model
def create(self,vals):
    vals['test_value']=self.amount_untaxed
    print(vals['test_value'])
    return super(PurchaseOrderInherit,self).create(vals)

但是打印功能返回0.0。请有人帮助我。

Answer 1

如果要获取值，则在create调用中计算计算字段：

@api.model
def create(self,vals):
    # create returns the newly created record
    rec = super(PurchaseOrderInherit,self).create(vals)
    print(rec.amount_untaxed)
    # if you want to set the value just do this
    rec.test_value = rec.amount_untaxed  # this will trigger write call to update the field in database
    return rec

Answer 2

计算字段是即时计算的。除非您调用self.amount_untaxed，否则super的值将不可用。

@api.model
def create(self,vals):
    res = super(PurchaseOrderInherit,self).create(vals)
    print(vals['test_value'])
    return res  

如果test_value字段是计算字段，则不必覆盖create和write方法中的值，而只需覆盖与计算相同的方法amount_untaxed值。