_约束，无法创建退款发票Odoo v10社区

Question

我有这个约束：

_constraints = [
    (_unique_invoice_per_partner,
     _('The Document you have been entering for this Partner has already'
       ' been recorded'),
     ['Control Number (nro_ctrl)', 'Reference (reference)']),
]

关于这个领域：

nro_ctrl = fields.Char(
    string='Control Number', size=32, readonly=True, required=True,
    states={'draft': [('readonly', False)]},
    help="Number used to manage pre-printed invoices, by law you will"
         " need to put here this number to be able to declarate on"
         " Fiscal reports correctly.")

如果创建发票，验证并付款（此字段在account.invoice模型中），则此约束有效。

但是，如果我创建了退款，那么它说一个字段设置不正确：

The operation cannot be completed, probably due to the following:
- deletion: you may be trying to delete a record while other records still reference it
- creation/update: a mandatory field is not correctly set

[object with reference: nro_ctrl - nro.ctrl] 

我也有这种方法，理论上应该允许“复制”或复制发票，其中包括以下字段：

@api.multi
def copy(self, default=None):
    """ Allows you to duplicate a record,
    child_ids, nro_ctrl and reference fields are
    cleaned, because they must be unique
    """
    # NOTE: Use argument name ids instead of id for fix the pylint error
    # W0621 Redefining buil-in 'id'
    #if default is None:
        #default = {}
    default = self._context.copy() #default.copy()
    default.update({
        'nro_ctrl': None, 
        'supplier_invoice_number': None,
        'sin_cred': False,
        # No cleaned in this copy because it is related to the previous
        # document, if previous document says so this too
        'date_document': False,
        'invoice_printer': '',
        'fiscal_printer': '',
        # No cleaned in this copy because it is related to the previous
        # document, if previous document says so this too
        # loc_req':False,
        'z_report': '',
    })
    return super(AccountInvoice, self).copy(default)

这是我正在从v8社区迁移到v10社区的结果。

我不知道是否需要这种copy方法。

如何在考虑这一限制的情况下创建退款？ 我的意思是，将nro_ctrl字段与之对应。

有任何想法吗？

Answer 1

您已经创建了新字段nro_ctrl，并且已经在py文件中写入了required = True 。

当您在py文件中写入必填字段时，则在Database表中是必填字段 。

在复制方法中，您正在更新'nro_ctrl'：无 。 因此，由于在必填字段中没有值，因此您在创建时会出错。

如果发票中需要nro_ctrl字段，那么您必须在退款的复制方法中提供唯一值。