按官方文档说明,odoo中的瞬态模型中的数据会在某一时刻自动清除:
Model super-class for transient records, meant to be temporarily persistent, and regularly vacuum-cleaned.
至于什么时候执行vacuum 动作,官方文档没有明确说明。
其实这个清理时间是在定时任务中指定的"Setting-->Technical-->Automation-->Scheduled Actions"中,“Base: Auto-vacuum internal data”这个定时任务:
根据这里面的python code,我们进一步确定代码:
class AutoVacuum(models.AbstractModel):
""" Expose the vacuum method to the cron jobs mechanism. """
_name = 'ir.autovacuum'
_description = 'Automatic Vacuum'
@api.model
def _gc_transient_models(self):
for mname in self.env:
model = self.env[mname]
if model.is_transient():
try:
with self._cr.savepoint():
model._transient_vacuum(force=True)
except Exception as e:
_logger.warning("Failed to clean transient model %s\n%s", model, str(e))
@api.model
def _gc_user_logs(self):
self._cr.execute("""
DELETE FROM res_users_log log1 WHERE EXISTS (
SELECT 1 FROM res_users_log log2
WHERE log1.create_uid = log2.create_uid
AND log1.create_date < log2.create_date
)
""")
_logger.info("GC'd %d user log entries", self._cr.rowcount)
@api.model
def power_on(self, *args, **kwargs):
if not self.env.is_admin():
raise AccessDenied()
self.env['ir.attachment']._file_gc()
self._gc_transient_models()
self._gc_user_logs()
return True
其中:power_on 是定时任务要执行的函数,里面的 “_gc_transient_models”是清理瞬态模型数据的函数。
扩展:如果我们需要自动清理自己的某个模型数据,可以通过继承“ir.autovacuum”,重写power_on函数,来达到清理自定义模型的目的。