Couchdb：显示_attachments(Couchdb: Show _attachments)

刚刚感受到CouchDB并且遇到一些误解。

我可以列出视图中的记录（感谢之前的响应者）

http://mysite.iriscouch.com/mydb/_design/_view/myview

我修改了我的视图以包含_attachments，但这似乎没有显示_attachments，它们是jpeg文件。

map function(doc) { if(doc.SignMark && doc.Details) { emit(doc.SignMark, doc.Details, doc._attachments); } }

我显然错过了一些简单的概念

谢谢 - mcl

Just getting a feel for CouchDB and hitting a few misunderstanding.

I can list the records from a view with (thanks to a previous responder)

http://mysite.iriscouch.com/mydb/_design/_view/myview

I have amended my view to include _attachments, but that does not appear to be showing the _attachments, which are jpeg files.

map function(doc) { if(doc.SignMark && doc.Details) { emit(doc.SignMark, doc.Details, doc._attachments); } }

I have obviously missed some simple concept

Thanks - mcl

最满意答案

Emit总是有两个参数：键和值。 每个都可以是一个对象。 这样可行：

function(doc) { if(doc.SignMark && doc.Details) { emit(doc.SignMark, [doc.Details, doc._attachments]); } }

但是您可以构造要发出的任意键和值，并且您还可以为每个文档发出多个或根本没有值。

优秀的CouchDB Book帮了我很多忙！ 这是观点的相关章节： http ： //guide.couchdb.org/draft/views.html

Emit always takes two parameters: key and value. Each can be an object. So this would work:

function(doc) { if(doc.SignMark && doc.Details) { emit(doc.SignMark, [doc.Details, doc._attachments]); } }

But you can construct arbitrary keys and values to emit, and you can also emit multiple or no values at all for each document.

The excellent CouchDB Book helped me a lot! This is the relevant chapter for views: http://guide.couchdb.org/draft/views.html

更多推荐