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Jordan Soo Yen Yih
Jordan Soo Yen Yih

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Apache CouchDB cheatsheet

#database #couchdb #beginners

Apache CouchDB is an open source NoSQL document database that collects and stores data in JSON-based document formats. Unlike relational databases, CouchDB uses a schema-free data model, which simplifies record management across various computing devices, mobile phones and web browsers.

In this post, I will focus on a few useful HTTP API which are use more frequently by the developers.

Index

Server

  1. Check CouchDB is running 
GET /
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Or

GET /_up
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  1. Check CouchDB's running tasks 
GET /_active_tasks
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  1. Get all databases 
GET /_all_dbs
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  1. Access the built-in Fauxton administration interface 
GET /_utils
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Databases

  1. Database Operations. 
* Get database
GET /{YOUR_DATABASE_NAME}

* Create database
PUT /{YOUR_DATABASE_NAME}

* Delete database
DELETE /{YOUR_DATABASE_NAME}
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  1. Create a new document in the specified database. 
POST /{YOUR_DATABASE_NAME}
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  1. List all documents in the database 
GET /{YOUR_DATABASE_NAME}/_all_docs
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  1. Query several documents in bulk 
POST /{YOUR_DATABASE_NAME}/_bulk_get
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  1. Create / Update documents in bulk 
POST /{YOUR_DATABASE_NAME}/_bulk_docs
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  1. Find documents with JSON querying syntax (Mango Query) 
POST /{YOUR_DATABASE_NAME}/_find
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  1. Setup database security 
* Get security object
GET /{YOUR_DATABASE_NAME}/_security

* Set security object
PUT /{YOUR_DATABASE_NAME}/_security
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Documents

  1. Document CRUD 
* Get a specific document
GET /{YOUR_DATABASE_NAME}/{DOCUMENT_ID}

* Create or Update a specific document
PUT /{YOUR_DATABASE_NAME}/{DOCUMENT_ID}

* Delete a specific document
DELETE /{YOUR_DATABASE_NAME}/{DOCUMENT_ID}
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  1. File Attachment CRUD. 
* Get a file attachment associated with the document
GET /{YOUR_DATABASE_NAME}/{DOCUMENT_ID}/{ATTACHMENT_NAME}

* Upload an attachment to the specified document
PUT /{YOUR_DATABASE_NAME}/{DOCUMENT_ID}/{ATTACHMENT_NAME}

* Delete an attachment from the specified document
DELETE /{YOUR_DATABASE_NAME}/{DOCUMENT_ID}/{ATTACHMENT_NAME}
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Design Documents

  1. Design Document CRUD 
* Get a design document
GET /{YOUR_DATABASE_NAME}/_design/{DESIGN_DOCUMENT_ID}

* Create a new design document
PUT /{YOUR_DATABASE_NAME}/_design/{DESIGN_DOCUMENT_ID}

* Delete a design document
PUT /{YOUR_DATABASE_NAME}/_design/{DESIGN_DOCUMENT_ID}
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  1. Execute a View function 
GET /{YOUR_DATABASE_NAME}/_design/{DESIGN_DOCUMENT_ID}/_view/{VIEW_NAME}

* Execute a view function with query string parameters
POST /{YOUR_DATABASE_NAME}/_design/{DESIGN_DOCUMENT_ID}/_view/{VIEW_NAME}
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  1. Execute an Update Function 
POST /{YOUR_DATABASE_NAME}/_design/{DESIGN_DOCUMENT_ID}/_update/{FUNCTION_NAME}
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Bonus

  1. Authentication For CouchDB v3.0+, currently supports 4 type of authentication methods (Basic, Cookie, Proxy, JWT). Every methods are interacting with the same API endpoint. 
GET /_session
POST /_session
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  1. Database changes

This is an interesting and powerful API which allows you to get a sorted list of changes made to documents in the specified database.

GET /{YOUR_DATABASE_NAME}/_changes

* For query parameter
POST /{YOUR_DATABASE_NAME}/_changes
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Thank you for reading

Above is the list of useful CouchDB HTTP API that use frequently by the developers. There are more actually but above are good enough for a normal project. Hope you find these resources useful.

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