检索Couchbase的所有记录(文档)

问题描述

我正在使用node.js并正在寻找一种方法来获取特定存储空间的所有文档.有没有循环和增量索引的解决方案吗?我知道我可以创建一个原子键，然后通过循环使用它来检索所有数据，但是我需要一个返回所有文档的函数.是否有任何功能至少"返回存储桶中已经存在的文档数量?

I am using node.js and looking for a way to get all documents of a specific bucket of couchbase. Is there any solution without having a loop and incremental index ? I know I can make an atomic key and later on using it via a loop to retrieve all data.But I need a function which returns all documents. Is there any function which 'at least' return me the number of documents already exist in bucket?

推荐答案

我也遇到了这个问题，根据Couchbase工程团队的说法，没有观点就不可能.因此，我最终有了一个视图的命名约定，该视图应该出现在我要具有所有键列表的每个存储桶中.

I've had this question before me as well, as per Couchbase engineering team its not possible without having a view. So I ended up having a naming convention for a view that should be present in every bucket that I want to have list of ALL keys.

我将其称为键"，而我的地图功能如下:

I call it "Keys" and my map function like this:

function (doc, meta) {
  emit(meta.id, null);
}

因此，在我的客户端上，我可以遍历存储桶中的所有文档...因为我知道所有密钥.

So then on my client I can iterate over all the documents in the bucket...since I know all the keys.

另一种替代方法是使用 N1QL 来获取所有密钥.这是Couchbase 3中引入的新查询语言.因此，您可以编写如下查询以返回所有文档键:

Another alternative is to use N1QL to get all the keys. THis is a new query language introduced in Couchbase 3. So you can write a query like this to return all documents keys:

SELECT META().id AS id
FROM your_bucket_name

或者您可以自己返回所有文档:

Or you can return all documents themselves:

SELECT *
FROM your_bucket_name

检查 Node.js和N1QL ，以获取更多信息.

Check Node.js and N1QL for additional information.

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