为什么django-viewflow内部表'viewflow_task_previous‘会倒退？

Question

假设定义了以下步骤

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当我深入研究内部表，特别是viewflow_task_previous表时，似乎from和to是颠倒的？

pmas=> select * from viewflow_task_previous where from_task_id = 10248;
  id  | from_task_id | to_task_id 
------+--------------+------------
 9099 |        10248 |      10247
(1 row)

pmas=> select id, status, flow_task, status from viewflow_task where id = 10248;
  id   |  status  |                                flow_task                                |  status  
-------+----------+-------------------------------------------------------------------------+----------
 10248 | ASSIGNED | connect_it/flows.new_circuit.flow.NewCircuit.external_task_installation | ASSIGNED
(1 row)

pmas=> select id, status, flow_task, status from viewflow_task where id = 10247;
  id   | status |                                flow_task                                | status 
-------+--------+-------------------------------------------------------------------------+--------
 10247 | DONE   | connect_it/flows.new_circuit.flow.NewCircuit.external_task_provisioning | DONE
(1 row)

有人能解释一下这是为什么以及如何工作的吗？

Answer 1

由任务模型的models.ManyToManyField previous字段创建的viewflow_task_previous表

https://github.com/viewflow/viewflow/blob/master/viewflow/models.py#L97

是的，这在SQL级别上造成了一些混乱