XML 中直接定义 python 脚本 和 sql 语句提取数据
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openerp\addons\account_test\account_test_data.xml 
 <record model="accounting.assert.test" id="account_test_02">
 <field name="sequence">2</field>
 <field name="name">Test 2: Opening a fiscal year</field>
 <field name="desc">Check if the balance of the new opened fiscal year matches with last year's balance</field>
 <field name="code_exec"><![CDATA[result = []
 cr.execute("select coalesce(sum(debit),0) as debit_new_fyear,coalesce(sum(credit),0) as credit_new_fyear from account_move_line where period_id in (select id from account_period where state='draft' and special order by id desc limit 1);")
 rec = cr.dictfetchall()
 cr.execute("select coalesce(sum(debit),0) as debit_last_fyear,coalesce(sum(credit),0) as credit_last_fyear from account_move_line where period_id in (select period_id from account_fiscalyear where state='done' order by id desc limit 1);")
 rec2= cr.dictfetchall()
 if (rec2[0]['credit_last_fyear']-rec[0]['credit_new_fyear']!=0) or (rec2[0]['debit_last_fyear']-rec[0]['debit_new_fyear']!=0) :
 result.append(('* New fiscalyear debit and credit are:'))
 result.append(rec[0])
 result.append(('* Last year debit and credit are:'))
 result.append(rec2[0])
 ]]></field>
 </record>
