Pouchdb。如何验证文档是否已复制

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我基本上是使用poychdb来让移动用户离线创建销售订单，然后将它们复制到中央Couchdb服务器，然后在Cron作业的基础上在那里处理它们。

Im using poychdb basically to let a mobile user create sales orders offline, then later replicate them to central couchdb server, then process them there on a cron job basis.

由于复制可以同步某些文档...然后停止（丢失Internet ...），我需要一种方法来阻止移动用户编辑那些已同步的订单。但是hd仍然可以编辑其他尚未上传的订单

As replication can sync some docs...then stop (lost Internet. ..) i need a way to block the mobile user from editing those already synced orders. But hd can still edit other non-yet-uploaded orders

有某种方法吗？

推荐答案

replicate（）函数返回一个事件发射器，该事件发射器发出'change'事件： pouchdb/api.html#replication 。

The replicate() function returns an event emitter which emits a 'change' event: pouchdb/api.html#replication.

因此您可以收听'change'事件，该事件将告诉您写入了多少文档以及 seq （更新序列号）。使用更改feed和 since 参数，您可以确定哪些文档已被写入远程数据库。

So you can listen for 'change' events, which will tell you how many documents were written and the seq (update sequence #) of the last written document. Using the changes feed and the since parameter, you can figure out which documents were already written to the remote database.

例如如果 last_seq 是50，则 changes（{since：50}）将为您提供所有未已同步。

E.g. if the last_seq is 50, then changes({since: 50}) will give you all documents that haven't been synced yet.