Deleting embedded document from document, MongoDB shell with $pull

pull that embed out

> use test_database
> var pu = db.Profileusers
> pu.find({"blocks.title":""}).toArray() // find in Profileusers collection all profile users that have a block which title is empty
[
	{
		"_id" : ObjectId("4fc73221c0cd99aba79c7b74"),
		"blocks" : [
			{
				"_id" : ObjectId("4fc78936376ab08618000000"),
				"title" : "", // <-- here is the incriminating element, it's gonna fly muaaahaaaaaaa-ha-ha-ha (evil_grin)
				"image" : "",
				"description" : "",
				"content" : ""
			},
			{
				"_id" : ObjectId("4fc78988376ab0ec2d000000"),
				"title" : "Efekat ♥", // <-- this one is safe for now
				"image" : "",
				"description" : "Some nicey nicey desc",
				"content" : "Who needs a content for Fs' sake"
			}
		],
		"password" : "password", // <-- totally safe, recommended ;)
		"roles" : [
			"ROLE_ADMIN"
		],
		"username" : "SpoyggNew2"
	}
]
> pu.update( {"blocks.title":""}, {$pull:{"blocks":{"title":""}}} ) // in Profileusers find all documents that have a block which title is empty
                                                                    // and $pull all blocks that have an empty title.
                                                                    // Some obvious notes:
                                                                    // 1. You can select root document anyway you like
                                                                    // 2. You can select embedded document anyway you like
                                                                    // 3. What is important is this construct:
                                                                    //    db.<collection>.update( <clause for root>, {$pull:<clause for embed(s)>} )
                                                                    // 4. Since this is done with Mongo shell do not paste this comments!!! Anyway
                                                                    //    it will stick better if you write it on your own you lazy copy-paster!
> pu.find({}).toArray()
[
	{
		"_id" : ObjectId("4fc73221c0cd99aba79c7b74"),
		"blocks" : [ // notice the absence of that ugly non-titled block :D
			{
				"_id" : ObjectId("4fc78988376ab0ec2d000000"),
				"title" : "Efekat ♥",
				"image" : "",
				"description" : "Some nicey nicey desc",
				"content" : "Who needs a content for Fs' sake"
			}
		],
		"password" : "password", // <-- once more, this is totally safe, use as much as possible :D
		"roles" : [
			"ROLE_ADMIN"
		],
		"username" : "SpoyggNew2"
	}
]