• Perl
• Jan 2015
• Commands
• Accessing server information
• Creating a database
• Get database info
• Create a document
• Retrieve a document
• Update document
• Etc.

CouchDB

http://couchdb.apache.org

Installed CouchDB on Oct 10, 2014.

apt-get install couchdb

It installed version 1.0.1.

Version 1.6.1 is available.

---

https://launchpad.net/~couchdb/+archive/ubuntu/stable

# install the ppa-finding tool
# for 12.04 release
sudo apt-get install python-software-properties -y

# for 14.04 release
sudo apt-get install software-properties-common -y

# add the ppa
sudo add-apt-repository ppa:couchdb/stable -y

# update cached list of packages
sudo apt-get update -y

# remove any existing couchdb binaries
sudo apt-get remove couchdb couchdb-bin couchdb-common -yf

# see my shiny goodness - note the version number displayed and ensure its what you expect
sudo apt-get -f install
sudo apt-get install -V couchdb

# manage via upstart
sudo stop couchdb
  couchdb stop/waiting

# update /etc/couchdb/local.ini with 'bind_address=0.0.0.0' as needed
sudo start couchdb
  couchdb start/running, process 17422

# check version
couchdb -V
    couchdb - Apache CouchDB 1.6.1

Good. Up to date. Oct 10, 2014

old post:
http://blog.woobling.org/2009/05/why-i-dont-use-couchdb.html

Perl

http://search.cpan.org/dist/CouchDB-Client/lib/CouchDB/Client.pm

The above main module is outdated or oldish, 2009.

http://cpanratings.perl.org/dist/CouchDB-Client

"Generally, when I have a choice I prefer AnyEvent::CouchDB."

http://search.cpan.org/~beppu/AnyEvent-CouchDB- 1.31/lib/AnyEvent/CouchDB.pm - (2011)

perl -MCPAN -e 'install CouchDB::Client'

Installed above Perl module on Oct 10, 2014. It took under one minute to install, unlike the nearly 10 minutes to complete the install of the MongoDB Perl client module.

Jan 2015

*

• • http://search.cpan.org/~zaphar/DB-CouchDB-Schema-0.3.04_remove_blib/lib/DB/CouchDB.pm

• Store::CouchDB
  • http://search.cpan.org/~norbu/Store-CouchDB-3.8/lib/Store/CouchDB.pm
  • https://github.com/norbu09/Store-CouchDB
  • https://metacpan.org/pod/Store::CouchDB

Commands

http://wiki.apache.org/couchdb/Complete_HTTP_API_Reference

CouchDB is API, HTTP, REST, JSON, and JavaScript driven.

in the file /etc/couchdb/local.ini set and uncomment the lines:
port=5984
bind_address=127.0.0.1

http://en.wikipedia.org/wiki/CouchDB

Accessing server information

curl http://127.0.0.1:5984/

Reponse:
{"couchdb":"Welcome","uuid":"2c6d440df9b206a8592c4f5db6f4e38a","version":"1.6.1","vendor":{"name":"Ubuntu","version":"12.04"}}

Creating a database

Creating a database named wiki

curl -X PUT http://127.0.0.1:5984/wiki

Response:
{"ok": true}

Attempting to create a second database named wiki

curl -X PUT http://127.0.0.1:5984/wiki

Response:
{"error":"file_exists", "reason":"The database could not be created, the file already exists."}

Get database info

Retrieve information about the wiki database

curl http://127.0.0.1:5984/wiki

{"db_name":"wiki","doc_count":0,"doc_del_count":0,"update_seq":0,"purge_seq":0,"compact_running":false,"disk_size":79,"data_size":0,"instance_start_time":"1412965274017838","disk_format_version":6,"committed_update_seq":0}

Create a document

Create a document, asking CouchDB to supply a document id

curl -X POST -H "Content-Type: application/json" --data '{ "text" : "Wikipedia on CouchDB", "rating": 5 }' http://127.0.0.1:5984/wiki

Response
{"ok":true,"id":"eadaefc9769de77b098009cfae000ef6","rev":"1-80fd6f7aeb55c83c8999b4613843af5d"}

Retrieve a document

curl http://127.0.0.1:5984/wiki/eadaefc9769de77b098009cfae000ef6

Response
{"_id":"eadaefc9769de77b098009cfae000ef6","_rev":"1-80fd6f7aeb55c83c8999b4613843af5d","text":"Wikipedia on CouchDB","rating":5}

Update document

http://wiki.apache.org/couchdb/HTTP_Document_API#PUT

curl -X PUT -H "Content-Type: application/json" --data '{ "text" : "Wikipedia on CouchDB", "rating": 0, "_rev":"1-80fd6f7aeb55c83c8999b4613843af5d"}' http://127.0.0.1:5984/wiki/eadaefc9769de77b098009cfae000ef6

Response
{"ok":true,"id":"eadaefc9769de77b098009cfae000ef6","rev":"2-5ba469fb0677c7293baab0403c478fd2"}

Etc.

[X] http://guide.couchdb.org/draft/cookbook.html

[X] http://guide.couchdb.org/draft/views.html

http://stackoverflow.com/questions/2923063/searching-by-key-in-apache-couchdb

http://sitr.us/2009/06/30/database-queries-the-couchdb-way.html

#database - #nosql - #json