从Node.js中的Cloudant数据库中删除文档 [英] Deleting a document from Cloudant Database in nodejs

问题描述

这可能是一个基本问题，但我浏览了github Cloudant库和Cloudant文档，并提到了从数据库中删除特定文档的情况，但从未进行彻底解释。非常令人沮丧我最想删除文档的方法是使用http请求，而不是Cloudant库提供的功能，即使我正在通过_rev传递文档，我也不断收到文档更新冲突。谁能解释使用nodejs从Cloudant数据库中删除文档的示例，以帮助您解决该问题。谢谢。

This may be a basic question but I've looked through the github Cloudant library and the Cloudant documentation and deleting a specific document from the database is mentioned but never thoroughly explained. It's very frustrating. The closest I've gotten to deleting a document is using an http request rather then the functions Cloudant library offers and I continuously get a "Document Update Conflict" even though I'm passing through the _rev of the document. Can anybody explain deleting a document from a Cloudant database using nodejs with an example to help sort this out. Thanks.

推荐答案

您可以使用destroy 方法= https://github.com/apache/couchdb-nano#document-functions rel = nofollow title = nano> nano 就像@JakePeyser所说的那样，而不是使用http API，因为使用nodejs。
但是由于您正在发送_rev并收到文档更新冲突错误，这使我怀疑您是否拥有最新的_rev。如果本地_rev与远程_rev不匹配，则通常会发生文档更新冲突。因此，我建议将 destroy 函数包装在 get 函数中。因此，对@JakePeyser的示例进行的更新将是：

You can use the destroy method of nano like @JakePeyser has said, instead of using http APIs since you are using nodejs. But since you are sending _rev and getting a "Document Update Conflict" error, it leads me to doubt if you have the latest _rev with you. "Document Update Conflict" happens mostly if the local _rev doesn't match the remote _rev. I would therefore suggest wrapping your destroy function in a get function. So an update to @JakePeyser's example would be:

var nano = require("nano")("cloudantURL"),
db = nano.db.use("yourDB");
db.get(docUniqueId, function(err, body) {
  if (!err) {
    var latestRev = body._rev;
    db.destroy(docUniqueId, latestRev, function(err, body, header) {
      if (!err) {
          console.log("Successfully deleted doc", docUniqueId);
      }
    });
  }
})

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