find all documents of all collections in db of mongoose using express

Question

i have a database with Mongodb , that contains 13 collections and i want to do a find function on it to get all the documents in that 13 collections in one command if it's possible , for info , i am working with mongoose & node expressjs

Answer 1

There is no way to get all the data from all the collections since queries run on the collection, not outside it. You could however run a loop to get the response from each collection and then consolidate it finally. Perhaps add the results of each collection to a data structure? Something like this -

var dataFromAllCollections = [];
const collections = db.getCollectionNames();
for(var i = 0; i< collections.length; i++){    
   dataFromAllCollections.push(db.getCollection(collections[i]).find());
}