How to access CouchDB documents using CouchRest model - ruby-on-rails

Question

Please help me to solve this. I’ve around 1500 documents in my CouchDB, each document belongs to any one of the types (‘Survey’ and ’Response’).
I need solution for followings
1] Need to display Document Ids (_id) in a Dropdown list which has document type (documentType) as ‘Survey’
2] If I select an item (_id) from drop down, I need to display all document Ids (_id) in list box which belongs to selected ID (_id selected from drop down list)
I've total 1500 documents like this
{
"_id": "ff2fb2554682ba613c2f83c63502808a",
"_rev": "4-dd559696434a402739e789ccc8c9a481",
"answers": [
{
"answers": [
"Aug 19,2011"
],
"questionId": "50f3df434ae02ac7fff48c1c2bde83e4"
},
{
"answers": [
"Bechu Yadav"
],
"questionId": "15504f006e58872fd94871fe0c9d32ad"
},
{
"answers": [
"35"
],
"questionId": "3c447a2f5cc6ca1985ce2c81463a3c47"
},
{
"answers": [
"Male"
],
"questionId": "a6df7c25602939554612ef6de762f5b9"
},
{
"questionId": "2f66155965e60094f23f01af531d5af1",
"subAnswers": [
{
"questionId": "1dae2d86eef846c967254c9e369170ce"
},
{
"questionId": "40ffeb4d33dab1fe8d2d8b73c02ed13b"
},
{
"questionId": "2db1e8b6e97d5baa8935b9b31fcc9648"
},
{
"questionId": "0f8bb9f91ea8085b4ffb839ee8deabb5"
},
{
"questionId": "22a93ecb72c50ff8899f8b2937776e51"
},
{
"questionId": "e5106384790c2be745c952c4b867a0ff"
}
]
"questionId": "492cf9bd41257ea478c5222fbba06616"
}
],
"createdAt": "2011-08-19T21:05:36.486+0000",
"createdBy": "user4",
"documentType": "Response",
"ipAddress": "42.110.85.67",
"location": {
"latitude": 26.8415613,
"longitude": 75.8222883,
"provider": "network"
},
"surveyId": "6df022f0f371752167ad4920b38e1c37",
"published": true
}
And my CouchRest model looks like as follows
class Android < CouchRest::Model::Base
property :description, String
property :_id, String
property :_rev, String
property :documentType, String
design do
view :by_documentType,:map =>"function(doc){if (doc.documentType == 'Survey') {emit(doc._id);}}"
view :by_createdBy
end
end
But when I access by_documentType it's returning nil
Android.find_by_documentType('Survey')

Answer 1

Thanks Friends!
Finally I found the Answer, I changed my Model as follows
require 'couchrest_model'
class Android < CouchRest::Model::Base
property :description, String
property :_id, String
property :_rev, String
property :documentType, String
property :surveyId, String
design do
view :by_document_type,:map =>"function(doc) {if (doc.documentType == \"Survey\") {emit([doc._id,doc.title], 1);}}",:reduce=>"function(keys, values, rereduce) {return sum(values);}"
view :by_surveyId,:map =>"function(doc) {emit([doc.surveyId], 1);}",:reduce=>"function(keys, values, rereduce) {return sum(values);}"
end
end
And now able to call this view as required. following returns all the documents which has document type 'Survey'
Android.by_document_type.rows
And Based on Survey ID selection, I can retrieve all documents which belongs to selected survey id, as follows
Android.by_surveyId.key('Selected Survey ID goes here').rows

Answer 2

Try Android.by_documentType.key('Survey')