Android-Couchbase Lite-带过滤器提取-Replication.setFilter [英] Android - Couchbase lite - pull with filter - Replication.setFilter

问题描述

我正在使用android messagerie应用程序，消息存储在互联网上的CouchDB（Apache）数据库中。
如何在Android设备上提取带有过滤器的消息？

I'm working on a android messagerie app, messages are stored in a CouchDB(Apache) database on the internet. How can I pull messages with filter on my Android devices?

Android代码段：

Android Snippet:

Replication pull = new Replication(messageDB, messageUrl, Replication.Direction.PULL);

//filter
pull.setFilter("message/by_username");
HashMap<String, Object> filterParams = new HashMap<>();
filterParams.put("username", usr);
pull.setFilterParams(filterParams);

pull.setContinuous(false); //oneshot
pull.start();

Apache设计文档：

Apache design document:

{
  "_id": "_design/message",
  "views": {
    "by_username": {
      "map": "function (doc) {\n  emit([doc.username]);\n  \n}"
    }
  },
  "filters": {
    "by_username": "function(doc, req){ if(!doc.username) return false; if(req.query.username && req.query.username != doc.username){return false} else {return true}}"
  },
  "language": "javascript"
}

使用块过滤器，同步将永远不会停止，但是数据库始终为空（3分钟后我没有找到任何文档）。

With the block filter, the synchronization will never stop but the database is always empty (I did not find any document after 3 minutes).

没有块过滤器，仅需几秒钟即可下载所有邮件。
谢谢。

Without the block filter, all messages are downloaded in only few seconds. Thanks.

推荐答案

但是，有一种解决方法可以使用带有ouchdb 2.x服务器的沙发床lite 1.4如上所述，无需对库进行任何更改。
请参考给出的答案此处

There is however a workaround for working with couchbase lite 1.4 with couchdb 2.x server to working without any change in the library as mentioned above. Please refer to answer given here

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