如何在odoo的搜索orm中获取计算字段值

Question

我在odoo 10 中定义了一个带有计算方法的computed field，现在我想在search orm 中获取它的值，但它的值仍然是False，当我尝试store=True 时它的值没有被改变。 如果有人有解决方案请告诉我，我将非常感谢。 我的代码是：

balance_amount = fields.Float(string="Balance Amount", compute='_compute_loan_amount')

@api.one
def _compute_loan_amount(self):
    total_paid = 0.0
    for loan in self:
        for line in loan.loan_lines:
            if line.paid:
                total_paid += line.amount
        balance_amount = loan.loan_amount - total_paid
        self.total_amount = loan.loan_amount
        self.balance_amount = balance_amount
        self.total_paid_amount = total_paid

当我使用search_countbelow 时：

loan_count = self.env['hr.loan'].search_count([('employee_id', '=', values['employee_id']), ('state', '=', 'approve'),
                                                   ('balance_amount', '!=', 0)])

即使balance_amount 等于Zero，它也总是得到计数值

Answer 1

这里有些事情你必须做。

1. 定义重新计算依赖关系并使用@api.multi 和self 上的for 循环，或者使用api.one 并跳过for 循环。如果我理解您的计算方法正确：

@api.multi
@api.depends('loan_lines.paid', 'loan_lines.amount', 'loan_amount')
def _compute_loan_amount(self):
    for loan in self:
        total_paid = 0.0
        for line in loan.loan_lines:
            if line.paid:
                total_paid += line.amount
        balance_amount = loan.loan_amount - total_paid
        loan.total_amount = loan.loan_amount  # ???
        loan.balance_amount = balance_amount
        loan.total_paid_amount = total_paid

1. 尝试使用浮点数舍入，例如2 位小数，因为浮点数会产生 0.000000000000000002 之类的值，这会破坏您的搜索。

2. 您要么必须存储值，要么必须定义search 方法。第二种方法更困难（根据我的经验）。