Mongo-fixture NPM

Mongo Fixture

Node module for populating a Mongo db using JSON.

Declaratively reference other documents in the same dataset to create relationships between them.

Install

npm install --save-dev mongo-fixture

Usage

fixture = require('mongo-fixture');

fixture('data.json', function(error){
	if(err){
		throw err;
	}
});

Example JSON file

[
	{
		"__collection": "User",
		"username": "User A",
		"age": 20,
		"active": false,
		"nonCollection": {
			"propA": "A"
		},
		"plan": {
			"__collection": "Plan",
			"__ref": "1",
			"name": "Plan A",
			"price": 100,
			"private": true,
			"specialOffer": {
				"__collection": "SpecialOffer",
				"propX": "X"
			},
			"otherProp": {
				"__collection": "OtherThing",
				"propR": "R",
				"__ref": "1"
			}
		}
	},
	{
		"__collection": "User",
		"username": "User B",
		"age": 20,
		"active": true,
		"plan": {
			"__collection": "Plan",
			"__duplicate": "1"
		}
	},
	{
		"__collection": "User",
		"username": "User C",
		"age": 32,
		"active": true,
		"plan": {
			"__collection": "Plan",
			"__ref": "2",
			"name": "Plan B",
			"price": 200,
			"private": false,
			"specialOffer": {
				"__collection": "SpecialOffer",
				"propX": "Y"
			},
			"otherProp": {
				"__collection": "OtherThing",
				"__duplicate": "1"
			}
		}
	},
	{
		"__collection": "User",
		"username": "User D",
		"age": 33,
		"active": true,
		"plan": {
			"__collection": "Plan",
			"__duplicate": "2"
		}
	}
]

Child Documents

Child documents are simple JSON objects with a __collection attribute. The child objects become ObjectId references when the db is populated.

Eg:

{
	"__collection": "ParentCollection",
	child: {
		"__collection": "ChildCollection",
		"keyX": "valueX"
	}
}

Becomes the following documents:

// ParentCollection Doc
{
	child: ObjectId("55c0ade6b47164eb35a544a1")
}
// ChildCollection Doc
{
	"keyX": "valueX"
}

Duplicates

Children can belong to multiple parents using __ref and __duplicate attributes. Defined a common child once and give it a unique __ref value of your choice. Then in another parent object reference the child by specifying the __duplicate attribute and setting it to the value of the __ref of the original.

Eg:

[
	{
		"__collection": "ParentCollection",
		"child": {
			"__collection": "ChildCollection",
			"_ref": "1",
			"otherProp": "X"
		}
	},
	{
		"__collection": "ParentCollection",
		"child": {
			"__collection": "ChildCollection",
			"_duplicate": "1"
		}
	}
]

NB: always specify the __collection attribute.