来自email_template类方法的Odoo被调用两次

Question

我正在尝试发送包含我从get_record_ids方法获得的数据的电子邮件。问题是get_record_ids有时会被调用两次，有时一次，我不知道为什么。

email_template：

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data noupdate="1">
        <record id="email_template_test" model="mail.template">
            <field name="name">test</field>
            <field name="email_from">xxx@mail.com</field>
            <field name="email_to">xxl@mail.com</field>
            <field name="subject">test</field>
            <field name="model_id" ref="test.model_test"/>
            <field name="auto_delete" eval="True"/>
            <field name="body_html"><![CDATA[
                <p>Hi,</p>This is simple test <br><br>

                <table width="771" cellspacing="1" cellpadding="4" border="1" height="73">
                <tbody>
                <tr>
                <td>Number</td>
                <td>Name</td>
                <td>Result</td>
            </tr>
            % if object.get_record_ids():
                % for values in object.get_record_ids()
                <tr>
                        <td>${values['number']}</td>
                        <td>${values['name']}</td>
                        <td>${values['result']}</td>
                </tr>
                % endfor
                % endif
                </tbody></table><br>
        ]]></field>
        </record>
    </data>
</openerp>

get_record_ids方法

@api.model
def get_record_ids(self):
       ticket_ids = self.env['stock.location'].search([('usage','=','view')], limit=5)
       records=[]
       for ticket_id in ticket_ids:
           tickets={}
           result = ticket_id.result
       ticket_id.result_difference = ticket_id.last_month_result - result
       ticket_id.last_month_result = result
       if ticket_id.result_difference != 0 and ticket_id:
       tickets['number'] = ticket_id.number
       tickets['name'] = ticket_id.name
       tickets['result'] = ticket_id.result
               records.append(tickets)
       return records

和

@api.model
def get_data(self):
res_id = 2
    template = self.env.ref('test.email_template_test')
    self.env['mail.template'].browse(template.id).send_mail(res_id, force_send=True)

ticket_id.result是计算值。