A Rails plugin for connecting to and working with CouchDB via CouchRest
Specifically, this plugin provides the following utilities:
This plugin does not interfere with the traditional relational database backend, so you can use that as a datastore alongside CouchDB if you want. (In fact, you'll have to unwire the requirement for a relational database if you don't want to use one.)
This plugin assumes some knowledge of CouchDB and its important differences from conventional Rails data storage (RDBMS) options. See the CouchDB site for more information.
Install with the native Rails plugin installation script:
script/plugin install git://github.com/hpoydar/couchrest-rails.git
Or simply add to vendor/plugins and generate the files you need:
The plugin creates two folders:
db/couch/- For storing CouchDB database information map and reduce functions (views)
test/fixtures/couch- for storing and loading CouchDB fixtures (yaml)
These paths can be customized in an initializer or environment configuration file:
CouchRestRails.fixtures_path = 'custom/path/to/your/fixtures/from/app/root' CouchRestRails.views_path = 'custom/path/to/your/views/from/app/root'
The installation process will also create a
config/couchdb.ymlfile for customizing your configuration.
couchdb.ymlfile can be customized to support the specifics of your particular CouchDB installation. Since multiple databases per application are supported, it is recommended that you specify a
database_prefixfor use in naming the database on the CouchDB server. This will make it much easier to peer into your server with Sofa and figure out which databases belong to which application.
Database names are defined in the
CouchRestRails::Documentmodels that use them. (See below, 'CouchRestRails document model')
Use the rake tasks to create databases, delete databases, reset databases, push views and load fixtures:
rake couchdb:create[database] # Create a CouchDB database defined in config/couchdb.yml for the current environment (use no database argument to use all databases defined in CouchRestRails::Document models) rake couchdb:delete[database] # Deletes a CouchDB database for the current RAILS_ENV (use no database argument to use all databases defined in CouchRestRails::Document models) rake couchdb:fixtures:load[database] # Load fixtures into a current environment's CouchDB database (use no database argument to use all databases defined in CouchRestRails::Document models) rake couchdb:lucene:push[database] # Push Lucene views into a current environment's CouchDB database (use no database argument to use all databases defined in CouchRestRails::Document models) rake couchdb:views:push[database] # Push views into a current environment's CouchDB database (use no database argument to use all databases defined in CouchRestRails::Document models) rake doc:plugins:couchrest-rails # Generate documentation for the couchrest-rails plugin
For models, inherit from CouchRestRails::Document, which hooks up CouchRest::ExtendedDocument to your CouchDB backend and includes the Validatable module:
class YourCouchDocument < CouchRestRails::Document use_database :database_name
property :email property :question property :answer property :rating
validates_presence_of :question validates_numericality_of :rating
Make sure you define your database in the model with the
See the CouchRest documentation and specs for more information about CouchRest::ExtendedDocument. (The views defined here are in addition to the ones you can manually set up and push via rake in db/couch/views.)
Custom views--outside of the ones defined in your CouchRestRails::Document models--that you want to push up to the CouchDB database/server instance should be in the following format:
db/couch//views |-- |-- |-- map.js `-- reduce.js
Push up your views via rake (
rake couchdb:views:push) or within your code or console (
For testing or spec'ing, use these helpers to setup and teardown a test database with fixtures:
There are also some simple matchers you can can use to spec validations. See
You can store fixtures as Yaml files in the following path pattern:
You can customize this path in an initializer or environment file:
CouchRestRails.fixtures_path = 'custom/path/to/your/fixtures'
Create fixture file by via rake (
rake couchdb:fixtures:dump) or within your code or console (
Add fixtures to rails test:
class RailsTest < Test::Unit::TestCase couchdb_fixtures :
If you want to support Lucene full-text searching of CouchDB documents, enable support for it in an initializer or environment configuration file:
CouchRestRails.use_lucene = true
The Lucene design documents per database are stored alongside the views:
db/couch//lucene |-- |-- .js |-- .js |-- ...
You can also customize this path:
CouchRestRails.lucene_path = 'custom/path/to/your/lucene/docs/from/app/root'
Push up your lucene doc via rake (
rake couchdb:lucence:push) or within your code or console (
To run the test suite, you'll need rspec installed with rspec-rails library enabled for the host application. You can run the tests in the following way:
$ rake spec:plugins $ rake spec $ autospec
(The latter requires the ZenTest gem)
Please don't submit any pull requests with failing specs
Copyright (c) Henry Poydar, released under the MIT license