This article demonstrates three approaches for storing tree like structures with NoSQL databases with example of MongoDB.
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use TreeMongo;
var path=[]
var item = db.categoriesPCO.findOne({_id:"Nokia"})
while (item.parent !== null) {
item=db.categoriesPCO.findOne({_id:item.parent});
path.push(item._id);
}
path.reverse().join(' / ');
//Electronics / Cell_Phones_and_Accessories / Cell_Phones_and_Smartphones
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