Odoo的ORM非常牛逼， 但是有一个缺点，就是删除一个模型的时候， 系统并不会帮我们从数据库中删除，然后重启odoo的时候就会报keyerror， 为了彻底从数据库中删除一个模型的数据，我整理了如下sql脚本：

-- 查找model_id
select * from ir_model where model='hx.dcs.device.data';
delete from  ir_model_relation where model=147;
delete from ir_model_fields_selection where field_id in (select id from ir_model_fields where  model_id=147 );
delete from ir_model_fields_group_rel where field_id in (select id from ir_model_fields where  model_id=147 );
delete from ir_model_fields where model_id=147;
delete from ir_model_data where model='hx.dcs.device.data';
delete from ir_model_access where model_id=147;delete from ir_model_constraint where model=147;
delete from ir_model where model='hx.dcs.device.data';

重要提醒：删除有风险，谨慎使用！！！