Small script to populate collections

populate.coffee

_ = require('lodash')

module.exports =
populate = (mapName, fromCollection, toCollection, fromId, toId='id') ->
  indexed = _.indexBy(toCollection, toId)
  for doc in fromCollection || []
    doc[mapName] = indexed[doc[revision_id]]


docs = [
  {id: 1, title: 'foo', user_id: 2},
  {id: 2, title: 'bar', user_id: 10},
  {id: 2, title: 'bar'}
]


users = [
  {id: 2, name: 'test'},
  {id: 10, name: 'blub'}
]


// This sets all references
populate('users', docs, users, 'user_id')