Apache CouchDB

您可以在Wikipedia上了解到此条目的英文信息 Apache CouchDB Thanks, Wikipedia.

简介

CouchDB是一个文档数据库；它是一个支持复制的（Replecated）文档数据库，具有REST接口，也就是说可以在HTTP上，用标准的GET、PUT、POST动词去访问。而且它用JavaScript作为查询语言去建立数据视图（View）。在SQL数据库里，你要定义各种表和表中的数据类型及大小，CouchDB不一样，它是没有Schema的。在CouchDB里，每个文档都是独立的对象，可以是任意的 JSON结构。这是技术上的表述。那么它的优点在哪里呢？它有利于构建很多协作型的应用，很多Web应用都是围绕着文档、上下文、任务、Bug报告，诸如此类的东西。这些就是CouchDB最擅长的方面。

相似项目: MongoDB

CouchDB和Lotus Notes最接近, 其核心就是文档模型.

Apache CouchDB Sketch

CouchDB创造者Damien Katz畅谈CouchDB

Install

Windows

先安装 Erlang, 再安装 CouchDB

启动 C:\erl5.7.2\bin\couch_start.bat

访问 http://localhost:5984/_utils/index.html

Database

A CouchDB database is a flat collection of these documents.

CouchDB Document

A CouchDB document is simply a JSON object.

A CouchDB document is an object that consists of named fields. Field values may be strings, numbers, dates, or even ordered lists and associative maps. An example of a document would be a blog post:

"Subject": "I like Django"  
"Author": "Allen"  
"PostedDate": "5/23/2009"  
"Tags": ["Python", "Django", "Framework"]
"Body": "Django is a high-level Python Web framework that encourages rapid development and clean, I like Django."

CouchDB Views

Views are the primary tool used for querying and reporting on CouchDB documents. There are two different kinds of views: permanent and temporary views.

Views are defined with Javascript functions. Here is the very simplest function:

function(doc) {
  emit(null, doc);
}

Python

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dotCloud open-source cloud federation platform
Ajatus CRM A CRM that runs as a local Ajax web application
Couchit minimal site creator
http://scratchpad.cmlenz.net/
http://wiki.apache.org/couchdb/CouchDB_in_the_wild

Links

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