我如何继承mail.thread类

Question

TypeError：模型“workflow.example”指定一个不存在的父类“mail.thread” 您可能需要在父类的模块上添加依赖项。

    _name = 'workflow.example'
    _inherit = ['mail.thread']
    _columns = {
        'abc':fields.char('abc', size=20),
        'state': fields.selection([
        ('new','New'),
        ('assigned','Assigned'),
        ('negotiation','Negotiation'),
        ('won','Won'),
        ('lost','Lost')], 'Stage', readonly=True, track_visibility='onchange'),
        'field_1': fields.char('Field_1', size=20),
        'field_2': fields.char('Field_2', size=16),        
    }

 workflow_example()

Answer 1

错误消息说，您必须更新__openerp__.py文件并将“mail”添加到“depends”参数：

"depends" : ["base", "mail"],