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Thanks digitalsatori & mrshelly !

果然是x_ 的原因.

新增的字段可以到数据表删除，但是在数据依然残留在 Administration-> Customization->Database Structure-> Fields。

修改 hr_expense.py

<br />def expense_accept(self, cr, uid, ids, *args):<br />&nbsp; &nbsp; &nbsp; &nbsp; # 任何人都不能 accept 自己创建的 expense<br />&nbsp; &nbsp; &nbsp; &nbsp; userID = self.browse(cr, uid, ids)[0].user_id.id<br />&nbsp; &nbsp; &nbsp; &nbsp; if userID == uid:<br />&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; raise osv.except_osv(_(&#039;Error !&#039;), _(&#039;You can not accept your expense by yourself!&#039;))<br />