如何进行文件的部分更新 [英] How to do partial update of a document

问题描述

我需要有关如何更新CouchDB中的字段的指南。我尝试通过控制台卷曲，它可以正常工作，但以编程方式。我不知道如何更新特定字段（例如姓名）。这是在CouchDB中更新文档的片段，该片段可以正常工作并向我返回更新的修订版ID。

I need a guidance on how can I update a field in CouchDB. I tried curl via console it works fine but programatically. I don't understand how to update a particular field say 'name'. Here is the snippet of updating a document in CouchDB which works fine and returns me the updated revision id.

HttpPut httpPutRequest = new HttpPut(hostUrl +"/"+ docId);
StringEntity body = new StringEntity(jsonDoc.toString());
httpPutRequest.setEntity(body);

httpPutRequest.setHeader("Accept", "application/json");
httpPutRequest.setHeader("Content-type", "application/json");

推荐答案

CouchDB不支持部分更新。换句话说，要更新文档中的字段，必须更新本地JSON文档中的字段并将该文档作为一个整体推送到CouchDB。

Partial updates are not supported by CouchDB. In other words, to update a field in the document, you must update the field in your local JSON document and push that document to CouchDB as a whole.

您可以完成通过仍然发出HTTP PUT，确保文档中包含适当的_rev。

You can accomplish this by still issuing an HTTP PUT, ensuring the appropriate _rev is included in your document.

更多详细信息，请参见 。

More details are available in the wiki.

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