Question

根据couchDb 2.0的官方文件 http://docs.couchdb.org/en/2.0.0/api/database/common.html

获取/ {db} 获取有关指定数据库的信息。

参数： db - 数据库名称请求标题：

接受 - 应用程序/ JSON 文本/纯

响应标题：

Content-Type –
application/json
text/plain; charset=utf-8

响应JSON对象：

committed_update_seq (number) – The number of committed update.
compact_running (boolean) – Set to true if the database compaction routine is operating on this database.
db_name (string) – The name of the database.
disk_format_version (number) – The version of the physical format used for the data when it is stored on disk.
data_size (number) – The number of bytes of live data inside the database file.
disk_size (number) – The length of the database file on disk. Views indexes are not included in the calculation.
doc_count (number) – A count of the documents in the specified database.
doc_del_count (number) – Number of deleted documents
instance_start_time (string) – Timestamp of when the database was opened, expressed in microseconds since the epoch.
purge_seq (number) – The number of purge operations on the database.
**update_seq (number) – The current number of updates to the database.**

状态代码：
200 OK - 请求已成功完成找不到404 - 找不到请求的数据库

update_seq必须以数字形式返回，但在我们运行请求时

http://192.168.1.48:5984/testing **（CouchDb 2.0）**回复是

{"db_name":"testing","update_seq":"0-g1AAAAFTeJzLYWBg4MhgTmEQTM4vTc5ISXLIyU9OzMnILy7JAUoxJTIkyf___z8rkQGPoiQFIJlkT1idA0hdPGF1CSB19QTV5bEASYYGIAVUOp8YtQsgavcTo_YARO19YtQ-gKgFuTcLANRjby4","sizes":{"file":33952,"external":0,"active":0},"purge_seq":0,"other":{"data_size":0},"doc_del_count":0,"doc_count":0,"disk_size":33952,"disk_format_version":6,"data_size":0,"compact_running":false,"instance_start_time":"0"}

以前在我们运行请求的couchdb 1.6.1中

http://192.168.1.80:5984/learners （CouchDb 2.0）响应

{"db_name":"learners","doc_count":0,"doc_del_count":3,**"update_seq":6**,"purge_seq":0,"compact_running":false,"disk_size":12386,"data_size":657,"instance_start_time":"1487830025605920","disk_format_version":6,"committed_update_seq":6}

因此，plz解释这是在couchdb 2.0或其他方面的一个例外。

Answer 1

CouchDB文档不是最新版本。 CouchDB 2.0引入了群集，并且通过群集，update_seq必须更改为唯一的字符串。

您应该将update_seq视为不透明的标识符，而不是具有固有含义的内容。如果update_seq已更改，则数据库本身已更改。

也就是说，update_seq的第一部分是一个数字，所以如果你真的需要数字序列，你可以解析它。但我强烈建议不要依赖它，因为update_seq格式可能会在未来版本的CouchDB中发生变化。

CouchDb 2.0：update_seq不是数字

1 个答案: