sync.filter.coffee

should = require('chai').should()
PouchDB = require('pouchdb')
async = require('async')
db = new PouchDB('mobile', db: require('memdown'))
remote = new PouchDB('remote', db: require('memdown'))
filter =
    _id: '_design/myfilter'
    filters: config: ((doc) ->
        doc.type == 'ok'
    ).toString()
localDocs = [
    { _id: '0' }
    {
        _id: '1'
        type: 'ok'
    }
    filter
]
remoteDocs = [
    { _id: 'a' }
    {
        _id: 'b'
        type: 'ok'
    }
    filter
]


remote.bulkDocs(remoteDocs).then(->
    db.bulkDocs localDocs
).then(->
    new (PouchDB.utils.Promise)((resolve, reject) ->
        filter = 'myfilter/config'
        changes = 0

        onChange = (c) ->
            changes += c.change.docs.length
            if changes == 2
                sync.cancel()
            return

        sync = db.sync(remote,
            filter: filter
            live: true
            retry: true
            batch_size: 20
            batches_limit: 5
            back_off_function: (delay) ->
                return 1000 if delay is 0
                return delay if delay > 60000
                return delay * 2).on('error', reject).on('change', onChange).on('complete', resolve)
        return
    )
).then(->
    db.allDocs()
).then((docs) ->
    console.log docs.total_rows
    remote.allDocs()
).then (docs) ->
    console.log docs.total_rows
    return