Manage tree structures in MongoDB
Install the module with: npm install mongotree
Create a default tree
var mongotree = require('mongotree'),
MongoClient = require('mongodb').MongoClient,
dsn = 'mongodb://localhost:27017/my-database';
// Create a new tree structure in a mongodb collection
MongoClient.connect(dsn, function(err, db) {
mongotree.addTree('products/cameras/accessories', db.collection('my-collection'), function(err, tree) {
console.log(tree);
db.close();
});
});
// outputs
[ { _id: 'products', name: 'products', parent: '' },
{ _id: 'products/cameras', name: 'cameras', parent: 'products' },
{ _id: 'products/cameras/accessories',
name: 'accessories',
parent: 'products/cameras' } ]Create a tree with custom params for nodes
var params = {
path: 'products/cameras/accessories',
created: new Date()
};
mongotree.addTree(params, db.collection('my-collection'), function(err, tree) {
console.log(tree);
});
// outputs
[ { _id: 'products',
name: 'products',
parent: '',
created: Fri Aug 16 2013 09:41:44 GMT-0700 (MST) },
{ _id: 'products/cameras',
name: 'cameras',
parent: 'products',
created: Fri Aug 16 2013 09:41:44 GMT-0700 (MST) },
{ _id: 'products/cameras/accessories',
name: 'accessories',
parent: 'products/cameras',
created: Fri Aug 16 2013 09:41:44 GMT-0700 (MST) } ]Create a tree with friendly path names
mongotree.addTree('Products / Cameras / Camera Accessories', collection, function(err, tree) {
console.log(tree);
});
// outputs
[ { _id: 'products',
name: 'Products',
parent: '' },
{ _id: 'products/cameras',
name: 'Cameras',
parent: 'products' },
{ _id: 'products/cameras/camera-accessories',
name: 'Camera Accessories',
parent: 'products/cameras' } ]Get ancestors
mongotree.getAncestors('products/cameras/accessories', collection, function(err, tree) {
console.log(tree);
});
// outputs
[ { _id: 'products', name: 'products', parent: '' },
{ _id: 'products/cameras', name: 'cameras', parent: 'products' } ]Get decendants
mongotree.getDecendants('products', collection, function(err, tree) {
console.log(tree);
});
// outputs
[ { _id: 'products/cameras', name: 'cameras', parent: 'products' },
{ _id: 'products/cameras/accessories',
name: 'accessories',
parent: 'products/cameras' } ]