Meteor object mapper

Omm maps between rich objects and documents.

Key features

• Load rich objects instead of documents from a collection

• Describe the object graph through annotation-style function calls

• Declare meteor methods through annotations-style function calls

• Perform collection altering operations anywhere on the object graph

• Strengthens encapsulation of objects by removing persistence logic from the domain logic

• Atomicity over complex operations within one document

Api Documentation

JsDoc

Example

Garden.js

Garden = function Garden( name, id ){
	this._id = id;
	this.name = name;
	this.plants = [];
	this.harvested = 0;
};
// declares Garden as an Entity
omm.addEntity(Garden);
// declares that the property "plants" contains objects of the type "Plant"
omm.arrayType(Garden, "plants", "Plant");

Garden.prototype.addPlant = function( t ){
	this.plants.push( new Plant( t, this ) );
};
omm.collectionUpdate( Garden, "addPlant" );

Garden.prototype.growPlants = function(){
	this.plants.forEach( function(p){
		p.grow();
	});
};
omm.collectionUpdate( Garden, "growPlants" );

Plant.js

Plant = function Plant( type, garden ){
	//this._id = "id"+garden.plants.length;
	this.type = type;
	this.height = 1;
	this.garden = garden;
};
// declares that Plant is an Entity
omm.addEntity(Plant);
// declares that the property garden contains object of the class "Garden"
omm.type(Plant, "garden", "Garden");
// declares that the value of the property should be stored as a key (string) rather than the actual object
omm.asForeignKey(Plant, "garden");


Plant.prototype.grow = function(){
	if( this.height<20 )
		this.height++;
	if( this.height==10 || this.height==15 ){
		this.garden.addPlant(this.type,this.garden);
	}
};

Plant.prototype.harvest = function(){
	var i = this.garden.plants.indexOf(this);
	this.garden.plants.splice(i,1);
	this.garden.harvested+=this.height;
};
// declares that the function "harvest" should also be invoked on the object in the collection.
omm.collectionUpdate( Plant, "harvest");

License

MIT