Presentation by Jonathan Weiss about Ruby on CouchDB at Ruby User Group Berlin in Marc 2010. Present SimplyStored, a nice wrapper for Ruby object. RockingChair is an in-memory CouchDB for speeding up your tests.

1. SimplyStored & RockingChair
Ruby on CouchDB
Jonathan Weiss, 04.03.2010
Peritor GmbH
Thursday, March 4, 2010

2. Peritor
Cloud-Management und -Deployment made easy
http://scalarium.com
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3. Database Requirements
High availability
Easy replication and copy
Clustering
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4. CouchDB
relax
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5. Die Lösung
Built for the Web
Scales
Performant
Replication built-in
Flexible schema
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6. CouchDB
{
"_id": "BCCD12CBB",
"_rev": "1-AB764C",
"type": "person",
"name": "Darth Vader",
"age": 63,
"headware": ["Helmet", "Sombrero"],
"dark_side": true
}
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7. CouchDB
{
"_id": "BCCD12CBB",
"_rev": "1-AB764C",
"type": "person",
"name": "Darth Vader",
"age": 63,
"headware": ["Helmet", "Sombrero"],
"dark_side": true
}
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8. CouchDB
{
"_id": "BCCD12CBB",
"_rev": "1-AB764C",
"type": "person",
"name": "Darth Vader",
"age": 63,
"headware": ["Helmet", "Sombrero"],
"dark_side": true
}
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9. CouchDB - CRUD
Create and update:
PUT /starwars/BCCD12CBB
Read:
GET /starwars/BCCD12CBB
Delete:
DELETE /starwars/BCCD12CBB
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10. CouchDB
How do I query my data?
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11. CouchDB
Views!
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12. CouchDB
function(doc) {
if (doc.headware) {
for (var hat in doc.headware) {
emit(hat, 1);
}
}
}
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13. CouchDB
function(keys, values, rereduce) {
return sum(values);
}
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14. CouchDB
function(keys, values, rereduce) {
return sum(values);
}
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15. Queries
SQL CouchDB JavaScript
SELECT * FROM function(doc) {
if (doc['ruby_class'] == 'User' &&
`users` WHERE doc['status'] == 1) {
`users`.id = 5 emit([doc.project_id,
doc.created_at], null);
AND `status` = 1; }
}
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16. Queries
ActiveRecord SimplyStored
class Project < ActiveRecord::Base class Project
has_many :users include SimplyStored::Couch
end has_many :users
end
Project.first.users Project.first.users
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17. SimplyStored
SimplyStored
Models
Associations
Validations
Callbacks
Dynamic finder
S3 attachments
Paranoid delete
http://github.com/peritor/simply_stored
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18. SimplyStored
Standing on the shoulders of giants:
- CouchPotato
- CouchRest
- RestClient
- HTTP
- CouchDB
http://github.com/peritor/simply_stored
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19. RockingChair
In-memory CouchDB
- Just a big Hash
- Speeds up your tests
- Tests can run in parallel
- Nice for debugging
http://github.com/jweiss/rocking_chair
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20. Now show me some Code!
Thursday, March 4, 2010

21. Peritor GmbH
Blücherstr. 22, Hof III Aufgang 6
10961 Berlin
Tel.: +49 (0)30 69 20 09 84 0
Fax: +49 (0)30 69 20 09 84 9
Internet: www.peritor.com
E-Mail: info@peritor.com
© Peritor GmbH - Alle Rechte Vorbehalten
Thursday, March 4, 2010