如何在使用cloudant查找api时查找总行数

Question

我有一个查找查询，如下所示

POST /movies/_find HTTP/1.1
Accept: application/json
Content-Type: application/json
Content-Length: 168
Host: localhost:5984

{
    "selector": {
        "year": {"$gt": 2010}
    },
    "fields": ["_id", "_rev", "year", "title"],
    "sort": [{"year": "asc"}],
    "limit": 2,
    "skip": 0
}

返回与查询匹配的前两个结果。是否可以使用此查询获取总行数。这在构建分页时非常有用

Answer 1

不，对不起为此，查询需要遍历整个集合进行计数。请注意，文本索引已经支持开箱即用的分页：

https://console.bluemix.net/docs/services/Cloudant/api/cloudant_query.html#finding-documents-by-using-an-index

Answer 2

您可以使用GET /电影获取数据库的元数据

总行数 - “doc_count”

响应示例：

    {
      "update_seq": "<some data>",
      "db_name": "movies",
      "sizes": {
        "file": <size>,
        "external": <size>,
        "active": <size>
      },
      "purge_seq": 0,
      "other": {
        "data_size": <size>
      },
      "doc_del_count": <number>,
      "doc_count": <number>,
      "disk_size": <size>,
      "disk_format_version": <version>,
      "compact_running": false,
      "instance_start_time": "0"
    }