Meteor Mongo Updating

meteor-mongo-updating.js

// Replaces all of Vote.users array
Votes.update(
 {_id: '32dc6fa5-052e-4e2c-8a90-4bd235bf3b0d'},
 {
   $set: { 
	'users':  [
	{
	  id: '2f537a74-3ce0-47b3-80fc-97a4189b2c15',
	  vote: 0
	},
	{
	  id: '6d46c5a6-d014-4ef8-b78b-c4638fc2cd7f',
	  vote: null
	},
	{
	  id: '8bffafa7-8736-4c4b-968e-82900b82c266',
	  vote: 1
	},
	{
	  id: 'a359da7f-a0d1-4f41-96e6-449dcde09a33',
	  vote: null
	}
	]
  }
}
)

// Set an individual users vote (by their index)
Votes.update({}, {$set: {'users.1.vote': 2}})

// Reset vote in all of vote.users array
vote = Votes.findOne({_id: vote_id})

_.each vote.users, (user) ->
	Votes.update(
		{_id: vote_id, 'users.id': user.id},
		{$set: {'users.$.vote': null}}
	)

// Remove a particular field
Votes.update({_id: '32dc6fa5-052e-4e2c-8a90-4bd235bf3b0d'}, {$unset: {user: 1}})

// Adds to vote.options array
Votes.update(
	{_id: '32dc6fa5-052e-4e2c-8a90-4bd235bf3b0d'},
	{
		$push: {
			options: {
				option: 'Whatever'
			}
		}
	}
)